* linux-3.7.4: kmemleak in sctp_sysctl_net_register()?
@ 2013-01-23 20:59 ` Martin Mokrejs
0 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-01-23 20:59 UTC (permalink / raw)
To: LKML, Vlad Yasevich, Sridhar Samudrala, linux-sctp
Hi,
today I got the following report from the kernel, looks it happened when
I started/used/quit chromium browser. I haven't seen this with 3.7.1 but
I use builtin kmemleak detector only for 2-3 weeks.
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
Please let me know if you need more info, like dmesg, .config or other.
Hope this helps.
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread* linux-3.7.4: kmemleak in sctp_sysctl_net_register()?
@ 2013-01-23 20:59 ` Martin Mokrejs
0 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-01-23 20:59 UTC (permalink / raw)
To: LKML, Vlad Yasevich, Sridhar Samudrala, linux-sctp
Hi,
today I got the following report from the kernel, looks it happened when
I started/used/quit chromium browser. I haven't seen this with 3.7.1 but
I use builtin kmemleak detector only for 2-3 weeks.
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
Please let me know if you need more info, like dmesg, .config or other.
Hope this helps.
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread* [PATCH] SCTP: Free the per-net sysctl table on net exit.
2013-01-23 20:59 ` Martin Mokrejs
@ 2013-01-24 16:02 ` Vlad Yasevich
-1 siblings, 0 replies; 34+ messages in thread
From: Vlad Yasevich @ 2013-01-24 16:02 UTC (permalink / raw)
To: netdev; +Cc: davem, linux-sctp, mmokrejs, Vlad Yasevich, Eric W. Biederman
Per-net sysctl table needs to be explicitly freed at
net exit. Otherwise we see the following with kmemleak:
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
CC: "Eric W. Biederman" <ebiederm@xmission.com>
---
net/sctp/sysctl.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 043889a..cd5712f 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
void sctp_sysctl_net_unregister(struct net *net)
{
+ struct ctl_table *table;
+
+ table = net->sctp.sysctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->sctp.sysctl_header);
+ kfree(table);
}
static struct ctl_table_header * sctp_sysctl_header;
--
1.7.7.6
^ permalink raw reply related [flat|nested] 34+ messages in thread* [PATCH] SCTP: Free the per-net sysctl table on net exit.
@ 2013-01-24 16:02 ` Vlad Yasevich
0 siblings, 0 replies; 34+ messages in thread
From: Vlad Yasevich @ 2013-01-24 16:02 UTC (permalink / raw)
To: netdev; +Cc: davem, linux-sctp, mmokrejs, Vlad Yasevich, Eric W. Biederman
Per-net sysctl table needs to be explicitly freed at
net exit. Otherwise we see the following with kmemleak:
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
CC: "Eric W. Biederman" <ebiederm@xmission.com>
---
net/sctp/sysctl.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 043889a..cd5712f 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
void sctp_sysctl_net_unregister(struct net *net)
{
+ struct ctl_table *table;
+
+ table = net->sctp.sysctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->sctp.sysctl_header);
+ kfree(table);
}
static struct ctl_table_header * sctp_sysctl_header;
--
1.7.7.6
^ permalink raw reply related [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit.
2013-01-24 16:02 ` Vlad Yasevich
@ 2013-01-24 16:44 ` Neil Horman
-1 siblings, 0 replies; 34+ messages in thread
From: Neil Horman @ 2013-01-24 16:44 UTC (permalink / raw)
To: Vlad Yasevich; +Cc: netdev, davem, linux-sctp, mmokrejs, Eric W. Biederman
On Thu, Jan 24, 2013 at 11:02:47AM -0500, Vlad Yasevich wrote:
> Per-net sysctl table needs to be explicitly freed at
> net exit. Otherwise we see the following with kmemleak:
>
> unreferenced object 0xffff880402d08000 (size 2048):
> comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
> hex dump (first 32 bytes):
> b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
> 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
> backtrace:
> [<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
> [<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
> [<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
> [<ffffffff810f10c2>] kmemdup+0x1b/0x30
> [<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
> [<ffffffff8155d305>] sctp_net_init+0x100/0x39f
> [<ffffffff814ad53c>] ops_init+0xc6/0xf5
> [<ffffffff814ad5b7>] setup_net+0x4c/0xd0
> [<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
> [<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
> [<ffffffff810939f4>] copy_namespaces+0x63/0x99
> [<ffffffff81076733>] copy_process+0xa65/0x1233
> [<ffffffff81077030>] do_fork+0x10b/0x271
> [<ffffffff8100a0e9>] sys_clone+0x23/0x25
> [<ffffffff815dda73>] stub_clone+0x13/0x20
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
> Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
> CC: "Eric W. Biederman" <ebiederm@xmission.com>
> ---
> net/sctp/sysctl.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
> index 043889a..cd5712f 100644
> --- a/net/sctp/sysctl.c
> +++ b/net/sctp/sysctl.c
> @@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
>
> void sctp_sysctl_net_unregister(struct net *net)
> {
> + struct ctl_table *table;
> +
> + table = net->sctp.sysctl_hdr->ctl_table_arg;
> unregister_net_sysctl_table(net->sctp.sysctl_header);
> + kfree(table);
> }
>
> static struct ctl_table_header * sctp_sysctl_header;
> --
> 1.7.7.6
>
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
^ permalink raw reply [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit.
@ 2013-01-24 16:44 ` Neil Horman
0 siblings, 0 replies; 34+ messages in thread
From: Neil Horman @ 2013-01-24 16:44 UTC (permalink / raw)
To: Vlad Yasevich; +Cc: netdev, davem, linux-sctp, mmokrejs, Eric W. Biederman
On Thu, Jan 24, 2013 at 11:02:47AM -0500, Vlad Yasevich wrote:
> Per-net sysctl table needs to be explicitly freed at
> net exit. Otherwise we see the following with kmemleak:
>
> unreferenced object 0xffff880402d08000 (size 2048):
> comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
> hex dump (first 32 bytes):
> b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
> 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
> backtrace:
> [<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
> [<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
> [<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
> [<ffffffff810f10c2>] kmemdup+0x1b/0x30
> [<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
> [<ffffffff8155d305>] sctp_net_init+0x100/0x39f
> [<ffffffff814ad53c>] ops_init+0xc6/0xf5
> [<ffffffff814ad5b7>] setup_net+0x4c/0xd0
> [<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
> [<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
> [<ffffffff810939f4>] copy_namespaces+0x63/0x99
> [<ffffffff81076733>] copy_process+0xa65/0x1233
> [<ffffffff81077030>] do_fork+0x10b/0x271
> [<ffffffff8100a0e9>] sys_clone+0x23/0x25
> [<ffffffff815dda73>] stub_clone+0x13/0x20
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
> Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
> CC: "Eric W. Biederman" <ebiederm@xmission.com>
> ---
> net/sctp/sysctl.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
> index 043889a..cd5712f 100644
> --- a/net/sctp/sysctl.c
> +++ b/net/sctp/sysctl.c
> @@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
>
> void sctp_sysctl_net_unregister(struct net *net)
> {
> + struct ctl_table *table;
> +
> + table = net->sctp.sysctl_hdr->ctl_table_arg;
> unregister_net_sysctl_table(net->sctp.sysctl_header);
> + kfree(table);
> }
>
> static struct ctl_table_header * sctp_sysctl_header;
> --
> 1.7.7.6
>
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
^ permalink raw reply [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit.
2013-01-24 16:44 ` Neil Horman
@ 2013-01-24 22:14 ` Eric W. Biederman
-1 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-24 22:14 UTC (permalink / raw)
To: Neil Horman; +Cc: Vlad Yasevich, netdev, davem, linux-sctp, mmokrejs
Neil Horman <nhorman@tuxdriver.com> writes:
> On Thu, Jan 24, 2013 at 11:02:47AM -0500, Vlad Yasevich wrote:
>> Per-net sysctl table needs to be explicitly freed at
>> net exit. Otherwise we see the following with kmemleak:
>>
>> unreferenced object 0xffff880402d08000 (size 2048):
>> comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
>> hex dump (first 32 bytes):
>> b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
>> 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
>> backtrace:
>> [<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
>> [<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
>> [<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
>> [<ffffffff810f10c2>] kmemdup+0x1b/0x30
>> [<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
>> [<ffffffff8155d305>] sctp_net_init+0x100/0x39f
>> [<ffffffff814ad53c>] ops_init+0xc6/0xf5
>> [<ffffffff814ad5b7>] setup_net+0x4c/0xd0
>> [<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
>> [<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
>> [<ffffffff810939f4>] copy_namespaces+0x63/0x99
>> [<ffffffff81076733>] copy_process+0xa65/0x1233
>> [<ffffffff81077030>] do_fork+0x10b/0x271
>> [<ffffffff8100a0e9>] sys_clone+0x23/0x25
>> [<ffffffff815dda73>] stub_clone+0x13/0x20
>> [<ffffffffffffffff>] 0xffffffffffffffff
>>
>> Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
>> Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
>> CC: "Eric W. Biederman" <ebiederm@xmission.com>
>> ---
>> net/sctp/sysctl.c | 4 ++++
>> 1 files changed, 4 insertions(+), 0 deletions(-)
>>
>> diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
>> index 043889a..cd5712f 100644
>> --- a/net/sctp/sysctl.c
>> +++ b/net/sctp/sysctl.c
>> @@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
>>
>> void sctp_sysctl_net_unregister(struct net *net)
>> {
>> + struct ctl_table *table;
>> +
>> + table = net->sctp.sysctl_hdr->ctl_table_arg;
>> unregister_net_sysctl_table(net->sctp.sysctl_header);
>> + kfree(table);
>> }
>>
>> static struct ctl_table_header * sctp_sysctl_header;
>> --
>> 1.7.7.6
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe netdev" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>
> Acked-by: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Doh. I should have known better.
Eric
^ permalink raw reply [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit.
@ 2013-01-24 22:14 ` Eric W. Biederman
0 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-24 22:14 UTC (permalink / raw)
To: Neil Horman; +Cc: Vlad Yasevich, netdev, davem, linux-sctp, mmokrejs
Neil Horman <nhorman@tuxdriver.com> writes:
> On Thu, Jan 24, 2013 at 11:02:47AM -0500, Vlad Yasevich wrote:
>> Per-net sysctl table needs to be explicitly freed at
>> net exit. Otherwise we see the following with kmemleak:
>>
>> unreferenced object 0xffff880402d08000 (size 2048):
>> comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
>> hex dump (first 32 bytes):
>> b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
>> 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
>> backtrace:
>> [<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
>> [<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
>> [<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
>> [<ffffffff810f10c2>] kmemdup+0x1b/0x30
>> [<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
>> [<ffffffff8155d305>] sctp_net_init+0x100/0x39f
>> [<ffffffff814ad53c>] ops_init+0xc6/0xf5
>> [<ffffffff814ad5b7>] setup_net+0x4c/0xd0
>> [<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
>> [<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
>> [<ffffffff810939f4>] copy_namespaces+0x63/0x99
>> [<ffffffff81076733>] copy_process+0xa65/0x1233
>> [<ffffffff81077030>] do_fork+0x10b/0x271
>> [<ffffffff8100a0e9>] sys_clone+0x23/0x25
>> [<ffffffff815dda73>] stub_clone+0x13/0x20
>> [<ffffffffffffffff>] 0xffffffffffffffff
>>
>> Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
>> Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
>> CC: "Eric W. Biederman" <ebiederm@xmission.com>
>> ---
>> net/sctp/sysctl.c | 4 ++++
>> 1 files changed, 4 insertions(+), 0 deletions(-)
>>
>> diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
>> index 043889a..cd5712f 100644
>> --- a/net/sctp/sysctl.c
>> +++ b/net/sctp/sysctl.c
>> @@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
>>
>> void sctp_sysctl_net_unregister(struct net *net)
>> {
>> + struct ctl_table *table;
>> +
>> + table = net->sctp.sysctl_hdr->ctl_table_arg;
>> unregister_net_sysctl_table(net->sctp.sysctl_header);
>> + kfree(table);
>> }
>>
>> static struct ctl_table_header * sctp_sysctl_header;
>> --
>> 1.7.7.6
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe netdev" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>
> Acked-by: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Doh. I should have known better.
Eric
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit.
2013-01-24 16:02 ` Vlad Yasevich
@ 2013-01-28 0:35 ` David Miller
-1 siblings, 0 replies; 34+ messages in thread
From: David Miller @ 2013-01-28 0:35 UTC (permalink / raw)
To: vyasevich; +Cc: netdev, linux-sctp, mmokrejs, ebiederm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^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit.
@ 2013-01-28 0:35 ` David Miller
0 siblings, 0 replies; 34+ messages in thread
From: David Miller @ 2013-01-28 0:35 UTC (permalink / raw)
To: vyasevich; +Cc: netdev, linux-sctp, mmokrejs, ebiederm
From: Vlad Yasevich <vyasevich@gmail.com>
Date: Thu, 24 Jan 2013 11:02:47 -0500
> @@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
>
> void sctp_sysctl_net_unregister(struct net *net)
> {
> + struct ctl_table *table;
> +
> + table = net->sctp.sysctl_hdr->ctl_table_arg;
> unregister_net_sysctl_table(net->sctp.sysctl_header);
> + kfree(table);
> }
In what tree does this compile? I tried both 'net' and 'net-next'
and got the same exact result:
net/sctp/sysctl.c: In function ‘sctp_sysctl_net_unregister’:
net/sctp/sysctl.c:371:19: error: ‘struct netns_sctp’ has no member named ‘sysctl_hdr’
make[1]: *** [net/sctp/sysctl.o] Error 1
make: *** [net/sctp/sysctl.o] Error 2
^ permalink raw reply [flat|nested] 34+ messages in thread* [PATCH] SCTP: Free the per-net sysctl table on net exit.
2013-01-28 0:35 ` David Miller
@ 2013-01-28 1:58 ` Eric W. Biederman
-1 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-28 1:58 UTC (permalink / raw)
To: David Miller; +Cc: vyasevich, netdev, linux-sctp, mmokrejs
Per-net sysctl table needs to be explicitly freed at
net exit. Otherwise we see the following with kmemleak:
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
I fixed the spelling of sysctl_header so the code actually
compiles. -- EWB.
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
net/sctp/sysctl.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 043889a..cd5712f 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
void sctp_sysctl_net_unregister(struct net *net)
{
+ struct ctl_table *table;
+
+ table = net->sctp.sysctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->sctp.sysctl_header);
+ kfree(table);
}
static struct ctl_table_header * sctp_sysctl_header;
--
1.7.5.4
^ permalink raw reply related [flat|nested] 34+ messages in thread* [PATCH] SCTP: Free the per-net sysctl table on net exit.
@ 2013-01-28 1:58 ` Eric W. Biederman
0 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-28 1:58 UTC (permalink / raw)
To: David Miller; +Cc: vyasevich, netdev, linux-sctp, mmokrejs
Per-net sysctl table needs to be explicitly freed at
net exit. Otherwise we see the following with kmemleak:
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
I fixed the spelling of sysctl_header so the code actually
compiles. -- EWB.
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
net/sctp/sysctl.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 043889a..cd5712f 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
void sctp_sysctl_net_unregister(struct net *net)
{
+ struct ctl_table *table;
+
+ table = net->sctp.sysctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->sctp.sysctl_header);
+ kfree(table);
}
static struct ctl_table_header * sctp_sysctl_header;
--
1.7.5.4
^ permalink raw reply related [flat|nested] 34+ messages in thread* [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-01-28 1:58 ` Eric W. Biederman
@ 2013-01-28 3:25 ` Eric W. Biederman
-1 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-28 3:25 UTC (permalink / raw)
To: David Miller; +Cc: vyasevich, netdev, linux-sctp, mmokrejs
From: Vlad Yasevich <vyasevich@gmail.com>
Date: Thu, 24 Jan 2013 11:02:47 -0500
Per-net sysctl table needs to be explicitly freed at
net exit. Otherwise we see the following with kmemleak:
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
I fixed the spelling of sysctl_header so the code actually
compiles. -- EWB.
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
The typo is fixed in the patch this time in addition to my test
tree.
net/sctp/sysctl.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 043889a..bf3c6e8 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
void sctp_sysctl_net_unregister(struct net *net)
{
+ struct ctl_table *table;
+
+ table = net->sctp.sysctl_header->ctl_table_arg;
unregister_net_sysctl_table(net->sctp.sysctl_header);
+ kfree(table);
}
static struct ctl_table_header * sctp_sysctl_header;
--
1.7.5.4
^ permalink raw reply related [flat|nested] 34+ messages in thread* [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-01-28 3:25 ` Eric W. Biederman
0 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-28 3:25 UTC (permalink / raw)
To: David Miller; +Cc: vyasevich, netdev, linux-sctp, mmokrejs
From: Vlad Yasevich <vyasevich@gmail.com>
Date: Thu, 24 Jan 2013 11:02:47 -0500
Per-net sysctl table needs to be explicitly freed at
net exit. Otherwise we see the following with kmemleak:
unreferenced object 0xffff880402d08000 (size 2048):
comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
I fixed the spelling of sysctl_header so the code actually
compiles. -- EWB.
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
The typo is fixed in the patch this time in addition to my test
tree.
net/sctp/sysctl.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index 043889a..bf3c6e8 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
void sctp_sysctl_net_unregister(struct net *net)
{
+ struct ctl_table *table;
+
+ table = net->sctp.sysctl_header->ctl_table_arg;
unregister_net_sysctl_table(net->sctp.sysctl_header);
+ kfree(table);
}
static struct ctl_table_header * sctp_sysctl_header;
--
1.7.5.4
^ permalink raw reply related [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-01-28 3:25 ` Eric W. Biederman
@ 2013-01-28 5:11 ` David Miller
-1 siblings, 0 replies; 34+ messages in thread
From: David Miller @ 2013-01-28 5:11 UTC (permalink / raw)
To: ebiederm; +Cc: vyasevich, netdev, linux-sctp, mmokrejs
From: ebiederm@xmission.com (Eric W. Biederman)
Date: Sun, 27 Jan 2013 19:25:11 -0800
> The typo is fixed in the patch this time in addition to my test
> tree.
Applied, thanks for fixing this up Eric.
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-01-28 5:11 ` David Miller
0 siblings, 0 replies; 34+ messages in thread
From: David Miller @ 2013-01-28 5:11 UTC (permalink / raw)
To: ebiederm; +Cc: vyasevich, netdev, linux-sctp, mmokrejs
From: ebiederm@xmission.com (Eric W. Biederman)
Date: Sun, 27 Jan 2013 19:25:11 -0800
> The typo is fixed in the patch this time in addition to my test
> tree.
Applied, thanks for fixing this up Eric.
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-01-28 5:11 ` David Miller
@ 2013-01-28 8:33 ` Martin Mokrejs
-1 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-01-28 8:33 UTC (permalink / raw)
To: David Miller; +Cc: ebiederm, vyasevich, netdev, linux-sctp
David Miller wrote:
> From: ebiederm@xmission.com (Eric W. Biederman)
> Date: Sun, 27 Jan 2013 19:25:11 -0800
>
>> The typo is fixed in the patch this time in addition to my test
>> tree.
>
> Applied, thanks for fixing this up Eric.
I did check now how come that I patched my 3.7.4 on Jan 24. Looks like
-head or -next has different namings. For me, the original patch applied
fine. So far I haven't hit the memleak although it happened only once to me
before the patch. But probably I can confirm say Tested-by:.
#
-rw-r--r-- 1 root root 8435 Jan 24 17:12 /usr/src/linux-3.7.4/net/sctp/sysctl.c
-rw-rw-r-- 1 root root 8347 Jan 21 20:45 /usr/src/linux-3.7.4/net/sctp/sysctl.c.orig
# ls -la /usr/src/linux-3.7.4/net/sctp/sysctl.o
-rw-r--r-- 1 root root 246144 Jan 21 22:37 /usr/src/linux-3.7.4/net/sctp/sysctl.o
# ls -la /usr/src/linux-3.7.4/arch/x86/boot/bzImage
-rw-r--r-- 1 root root 3794592 Jan 21 22:45 /usr/src/linux-3.7.4/arch/x86/boot/bzImage
#
If 3.7 and earlier need the old patch (like I currently think) please make them aware
of that.
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-01-28 8:33 ` Martin Mokrejs
0 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-01-28 8:33 UTC (permalink / raw)
To: David Miller; +Cc: ebiederm, vyasevich, netdev, linux-sctp
David Miller wrote:
> From: ebiederm@xmission.com (Eric W. Biederman)
> Date: Sun, 27 Jan 2013 19:25:11 -0800
>
>> The typo is fixed in the patch this time in addition to my test
>> tree.
>
> Applied, thanks for fixing this up Eric.
I did check now how come that I patched my 3.7.4 on Jan 24. Looks like
-head or -next has different namings. For me, the original patch applied
fine. So far I haven't hit the memleak although it happened only once to me
before the patch. But probably I can confirm say Tested-by:.
#
-rw-r--r-- 1 root root 8435 Jan 24 17:12 /usr/src/linux-3.7.4/net/sctp/sysctl.c
-rw-rw-r-- 1 root root 8347 Jan 21 20:45 /usr/src/linux-3.7.4/net/sctp/sysctl.c.orig
# ls -la /usr/src/linux-3.7.4/net/sctp/sysctl.o
-rw-r--r-- 1 root root 246144 Jan 21 22:37 /usr/src/linux-3.7.4/net/sctp/sysctl.o
# ls -la /usr/src/linux-3.7.4/arch/x86/boot/bzImage
-rw-r--r-- 1 root root 3794592 Jan 21 22:45 /usr/src/linux-3.7.4/arch/x86/boot/bzImage
#
If 3.7 and earlier need the old patch (like I currently think) please make them aware
of that.
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-01-28 8:33 ` Martin Mokrejs
@ 2013-01-28 15:47 ` Eric W. Biederman
-1 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-28 15:47 UTC (permalink / raw)
To: Martin Mokrejs; +Cc: David Miller, vyasevich, netdev, linux-sctp
Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
> David Miller wrote:
>> From: ebiederm@xmission.com (Eric W. Biederman)
>> Date: Sun, 27 Jan 2013 19:25:11 -0800
>>
>>> The typo is fixed in the patch this time in addition to my test
>>> tree.
>>
>> Applied, thanks for fixing this up Eric.
>
> I did check now how come that I patched my 3.7.4 on Jan 24. Looks like
> -head or -next has different namings. For me, the original patch applied
> fine. So far I haven't hit the memleak although it happened only once to me
> before the patch.
The problem isn't that the patch doesn't apply the problem is that the
patch did not build. The naming has not changed in the git history.
> But probably I can confirm say Tested-by:.
>
> #
> -rw-r--r-- 1 root root 8435 Jan 24 17:12 /usr/src/linux-3.7.4/net/sctp/sysctl.c
> -rw-rw-r-- 1 root root 8347 Jan 21 20:45 /usr/src/linux-3.7.4/net/sctp/sysctl.c.orig
> # ls -la /usr/src/linux-3.7.4/net/sctp/sysctl.o
> -rw-r--r-- 1 root root 246144 Jan 21 22:37 /usr/src/linux-3.7.4/net/sctp/sysctl.o
> # ls -la /usr/src/linux-3.7.4/arch/x86/boot/bzImage
> -rw-r--r-- 1 root root 3794592 Jan 21 22:45 /usr/src/linux-3.7.4/arch/x86/boot/bzImage
> #
It doesn't look look like you rebuilt anything after you applied the
changes to net/sctp/sysctl.c. sysctl.o and bzImage are both 3 days older.
Eric
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-01-28 15:47 ` Eric W. Biederman
0 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-28 15:47 UTC (permalink / raw)
To: Martin Mokrejs; +Cc: David Miller, vyasevich, netdev, linux-sctp
Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
> David Miller wrote:
>> From: ebiederm@xmission.com (Eric W. Biederman)
>> Date: Sun, 27 Jan 2013 19:25:11 -0800
>>
>>> The typo is fixed in the patch this time in addition to my test
>>> tree.
>>
>> Applied, thanks for fixing this up Eric.
>
> I did check now how come that I patched my 3.7.4 on Jan 24. Looks like
> -head or -next has different namings. For me, the original patch applied
> fine. So far I haven't hit the memleak although it happened only once to me
> before the patch.
The problem isn't that the patch doesn't apply the problem is that the
patch did not build. The naming has not changed in the git history.
> But probably I can confirm say Tested-by:.
>
> #
> -rw-r--r-- 1 root root 8435 Jan 24 17:12 /usr/src/linux-3.7.4/net/sctp/sysctl.c
> -rw-rw-r-- 1 root root 8347 Jan 21 20:45 /usr/src/linux-3.7.4/net/sctp/sysctl.c.orig
> # ls -la /usr/src/linux-3.7.4/net/sctp/sysctl.o
> -rw-r--r-- 1 root root 246144 Jan 21 22:37 /usr/src/linux-3.7.4/net/sctp/sysctl.o
> # ls -la /usr/src/linux-3.7.4/arch/x86/boot/bzImage
> -rw-r--r-- 1 root root 3794592 Jan 21 22:45 /usr/src/linux-3.7.4/arch/x86/boot/bzImage
> #
It doesn't look look like you rebuilt anything after you applied the
changes to net/sctp/sysctl.c. sysctl.o and bzImage are both 3 days older.
Eric
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-01-28 15:47 ` Eric W. Biederman
@ 2013-01-28 21:17 ` Martin Mokrejs
-1 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-01-28 21:17 UTC (permalink / raw)
To: Eric W. Biederman; +Cc: David Miller, vyasevich, netdev, linux-sctp
Hi Eric,
Eric W. Biederman wrote:
> Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
>
>> David Miller wrote:
>>> From: ebiederm@xmission.com (Eric W. Biederman)
>>> Date: Sun, 27 Jan 2013 19:25:11 -0800
>>>
>>>> The typo is fixed in the patch this time in addition to my test
>>>> tree.
>>>
>>> Applied, thanks for fixing this up Eric.
>>
>> I did check now how come that I patched my 3.7.4 on Jan 24. Looks like
>> -head or -next has different namings. For me, the original patch applied
>> fine. So far I haven't hit the memleak although it happened only once to me
>> before the patch.
>
> The problem isn't that the patch doesn't apply the problem is that the
> patch did not build. The naming has not changed in the git history.
>
>> But probably I can confirm say Tested-by:.
>>
>> #
>> -rw-r--r-- 1 root root 8435 Jan 24 17:12 /usr/src/linux-3.7.4/net/sctp/sysctl.c
>> -rw-rw-r-- 1 root root 8347 Jan 21 20:45 /usr/src/linux-3.7.4/net/sctp/sysctl.c.orig
>> # ls -la /usr/src/linux-3.7.4/net/sctp/sysctl.o
>> -rw-r--r-- 1 root root 246144 Jan 21 22:37 /usr/src/linux-3.7.4/net/sctp/sysctl.o
>> # ls -la /usr/src/linux-3.7.4/arch/x86/boot/bzImage
>> -rw-r--r-- 1 root root 3794592 Jan 21 22:45 /usr/src/linux-3.7.4/arch/x86/boot/bzImage
>> #
>
> It doesn't look look like you rebuilt anything after you applied the
> changes to net/sctp/sysctl.c. sysctl.o and bzImage are both 3 days older.
Ah, I must have been really blind. Thanks for pointing that out. I should
really start to do:
make bzImage && make modules && make modules_install && cp arch/x86_64/boot/bzImage /boot/vmlinuz-$ver
echo "silly me, make(1) did not delete the old bzImage"
So I haven't tested the patch yet. doh. Provided I am running 3 days without reproducing
the original memleak on an unpatched kernel I doubt I can easily prove it after a reboot.
:( Will probably stay untested. But compiles fine here. ;-)
Thanks,
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-01-28 21:17 ` Martin Mokrejs
0 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-01-28 21:17 UTC (permalink / raw)
To: Eric W. Biederman; +Cc: David Miller, vyasevich, netdev, linux-sctp
Hi Eric,
Eric W. Biederman wrote:
> Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
>
>> David Miller wrote:
>>> From: ebiederm@xmission.com (Eric W. Biederman)
>>> Date: Sun, 27 Jan 2013 19:25:11 -0800
>>>
>>>> The typo is fixed in the patch this time in addition to my test
>>>> tree.
>>>
>>> Applied, thanks for fixing this up Eric.
>>
>> I did check now how come that I patched my 3.7.4 on Jan 24. Looks like
>> -head or -next has different namings. For me, the original patch applied
>> fine. So far I haven't hit the memleak although it happened only once to me
>> before the patch.
>
> The problem isn't that the patch doesn't apply the problem is that the
> patch did not build. The naming has not changed in the git history.
>
>> But probably I can confirm say Tested-by:.
>>
>> #
>> -rw-r--r-- 1 root root 8435 Jan 24 17:12 /usr/src/linux-3.7.4/net/sctp/sysctl.c
>> -rw-rw-r-- 1 root root 8347 Jan 21 20:45 /usr/src/linux-3.7.4/net/sctp/sysctl.c.orig
>> # ls -la /usr/src/linux-3.7.4/net/sctp/sysctl.o
>> -rw-r--r-- 1 root root 246144 Jan 21 22:37 /usr/src/linux-3.7.4/net/sctp/sysctl.o
>> # ls -la /usr/src/linux-3.7.4/arch/x86/boot/bzImage
>> -rw-r--r-- 1 root root 3794592 Jan 21 22:45 /usr/src/linux-3.7.4/arch/x86/boot/bzImage
>> #
>
> It doesn't look look like you rebuilt anything after you applied the
> changes to net/sctp/sysctl.c. sysctl.o and bzImage are both 3 days older.
Ah, I must have been really blind. Thanks for pointing that out. I should
really start to do:
make bzImage && make modules && make modules_install && cp arch/x86_64/boot/bzImage /boot/vmlinuz-$ver
echo "silly me, make(1) did not delete the old bzImage"
So I haven't tested the patch yet. doh. Provided I am running 3 days without reproducing
the original memleak on an unpatched kernel I doubt I can easily prove it after a reboot.
:( Will probably stay untested. But compiles fine here. ;-)
Thanks,
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-01-28 21:17 ` Martin Mokrejs
@ 2013-01-28 21:25 ` Martin Mokrejs
-1 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-01-28 21:25 UTC (permalink / raw)
To: Eric W. Biederman; +Cc: David Miller, vyasevich, netdev, linux-sctp
Martin Mokrejs wrote:
> Hi Eric,
>
> Eric W. Biederman wrote:
>> Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
>>
>>> David Miller wrote:
>>>> From: ebiederm@xmission.com (Eric W. Biederman)
>>>> Date: Sun, 27 Jan 2013 19:25:11 -0800
>>>>
>>>>> The typo is fixed in the patch this time in addition to my test
>>>>> tree.
>>>>
>>>> Applied, thanks for fixing this up Eric.
> So I haven't tested the patch yet. doh. Provided I am running 3 days without reproducing
> the original memleak on an unpatched kernel I doubt I can easily prove it after a reboot.
Umm, I spoke too early. It did happen again during these 3 days on unpatched 3.7.4:
unreferenced object 0xffff880402769030 (size 2048):
comm "chrome_sandbox", pid 4720, jiffies 4294966701 (age 285697.590s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 84 4f d8 03 88 ff ff .h...... .O.....
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
But I won't make it to a reboot in next 2-3 days to test the patch v2, sorry.
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-01-28 21:25 ` Martin Mokrejs
0 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-01-28 21:25 UTC (permalink / raw)
To: Eric W. Biederman; +Cc: David Miller, vyasevich, netdev, linux-sctp
Martin Mokrejs wrote:
> Hi Eric,
>
> Eric W. Biederman wrote:
>> Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
>>
>>> David Miller wrote:
>>>> From: ebiederm@xmission.com (Eric W. Biederman)
>>>> Date: Sun, 27 Jan 2013 19:25:11 -0800
>>>>
>>>>> The typo is fixed in the patch this time in addition to my test
>>>>> tree.
>>>>
>>>> Applied, thanks for fixing this up Eric.
> So I haven't tested the patch yet. doh. Provided I am running 3 days without reproducing
> the original memleak on an unpatched kernel I doubt I can easily prove it after a reboot.
Umm, I spoke too early. It did happen again during these 3 days on unpatched 3.7.4:
unreferenced object 0xffff880402769030 (size 2048):
comm "chrome_sandbox", pid 4720, jiffies 4294966701 (age 285697.590s)
hex dump (first 32 bytes):
b2 68 89 81 ff ff ff ff 20 84 4f d8 03 88 ff ff .h...... .O.....
04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
[<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
[<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
[<ffffffff810f10c2>] kmemdup+0x1b/0x30
[<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
[<ffffffff8155d305>] sctp_net_init+0x100/0x39f
[<ffffffff814ad53c>] ops_init+0xc6/0xf5
[<ffffffff814ad5b7>] setup_net+0x4c/0xd0
[<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
[<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
[<ffffffff810939f4>] copy_namespaces+0x63/0x99
[<ffffffff81076733>] copy_process+0xa65/0x1233
[<ffffffff81077030>] do_fork+0x10b/0x271
[<ffffffff8100a0e9>] sys_clone+0x23/0x25
[<ffffffff815dda73>] stub_clone+0x13/0x20
[<ffffffffffffffff>] 0xffffffffffffffff
But I won't make it to a reboot in next 2-3 days to test the patch v2, sorry.
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-01-28 21:25 ` Martin Mokrejs
@ 2013-01-29 0:20 ` Eric W. Biederman
-1 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-29 0:20 UTC (permalink / raw)
To: Martin Mokrejs; +Cc: David Miller, vyasevich, netdev, linux-sctp
Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
> Martin Mokrejs wrote:
>> Hi Eric,
>>
>> Eric W. Biederman wrote:
>>> Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
>>>
>>>> David Miller wrote:
>>>>> From: ebiederm@xmission.com (Eric W. Biederman)
>>>>> Date: Sun, 27 Jan 2013 19:25:11 -0800
>>>>>
>>>>>> The typo is fixed in the patch this time in addition to my test
>>>>>> tree.
>>>>>
>>>>> Applied, thanks for fixing this up Eric.
>
>> So I haven't tested the patch yet. doh. Provided I am running 3 days without reproducing
>> the original memleak on an unpatched kernel I doubt I can easily prove it after a reboot.
>
> Umm, I spoke too early. It did happen again during these 3 days on unpatched 3.7.4:
>
> unreferenced object 0xffff880402769030 (size 2048):
> comm "chrome_sandbox", pid 4720, jiffies 4294966701 (age 285697.590s)
> hex dump (first 32 bytes):
> b2 68 89 81 ff ff ff ff 20 84 4f d8 03 88 ff ff .h...... .O.....
> 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
> backtrace:
> [<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
> [<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
> [<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
> [<ffffffff810f10c2>] kmemdup+0x1b/0x30
> [<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
> [<ffffffff8155d305>] sctp_net_init+0x100/0x39f
> [<ffffffff814ad53c>] ops_init+0xc6/0xf5
> [<ffffffff814ad5b7>] setup_net+0x4c/0xd0
> [<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
> [<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
> [<ffffffff810939f4>] copy_namespaces+0x63/0x99
> [<ffffffff81076733>] copy_process+0xa65/0x1233
> [<ffffffff81077030>] do_fork+0x10b/0x271
> [<ffffffff8100a0e9>] sys_clone+0x23/0x25
> [<ffffffff815dda73>] stub_clone+0x13/0x20
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> But I won't make it to a reboot in next 2-3 days to test the patch v2, sorry.
No biggy the logic remains the same and the fix in the patch is clrearly
needed from an inspection of the code.
Eric
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-01-29 0:20 ` Eric W. Biederman
0 siblings, 0 replies; 34+ messages in thread
From: Eric W. Biederman @ 2013-01-29 0:20 UTC (permalink / raw)
To: Martin Mokrejs; +Cc: David Miller, vyasevich, netdev, linux-sctp
Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
> Martin Mokrejs wrote:
>> Hi Eric,
>>
>> Eric W. Biederman wrote:
>>> Martin Mokrejs <mmokrejs@fold.natur.cuni.cz> writes:
>>>
>>>> David Miller wrote:
>>>>> From: ebiederm@xmission.com (Eric W. Biederman)
>>>>> Date: Sun, 27 Jan 2013 19:25:11 -0800
>>>>>
>>>>>> The typo is fixed in the patch this time in addition to my test
>>>>>> tree.
>>>>>
>>>>> Applied, thanks for fixing this up Eric.
>
>> So I haven't tested the patch yet. doh. Provided I am running 3 days without reproducing
>> the original memleak on an unpatched kernel I doubt I can easily prove it after a reboot.
>
> Umm, I spoke too early. It did happen again during these 3 days on unpatched 3.7.4:
>
> unreferenced object 0xffff880402769030 (size 2048):
> comm "chrome_sandbox", pid 4720, jiffies 4294966701 (age 285697.590s)
> hex dump (first 32 bytes):
> b2 68 89 81 ff ff ff ff 20 84 4f d8 03 88 ff ff .h...... .O.....
> 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
> backtrace:
> [<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
> [<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
> [<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
> [<ffffffff810f10c2>] kmemdup+0x1b/0x30
> [<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
> [<ffffffff8155d305>] sctp_net_init+0x100/0x39f
> [<ffffffff814ad53c>] ops_init+0xc6/0xf5
> [<ffffffff814ad5b7>] setup_net+0x4c/0xd0
> [<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
> [<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
> [<ffffffff810939f4>] copy_namespaces+0x63/0x99
> [<ffffffff81076733>] copy_process+0xa65/0x1233
> [<ffffffff81077030>] do_fork+0x10b/0x271
> [<ffffffff8100a0e9>] sys_clone+0x23/0x25
> [<ffffffff815dda73>] stub_clone+0x13/0x20
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> But I won't make it to a reboot in next 2-3 days to test the patch v2, sorry.
No biggy the logic remains the same and the fix in the patch is clrearly
needed from an inspection of the code.
Eric
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-01-28 3:25 ` Eric W. Biederman
@ 2013-03-05 9:05 ` Martin Mokrejs
-1 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-03-05 9:05 UTC (permalink / raw)
To: Eric W. Biederman; +Cc: David Miller, vyasevich, netdev, linux-sctp, stable
Hi,
this is to let you know that this patch is still not in stable.
I just fetched 3.7.10 and reproduced the original problem.
I bet this slipped through because there was an initial patch from Vlad Yasevich
on Jan 24, then a follow-up patch from Eric Biedermann which did not compile and
finally a v2 patch from E. B which did compile.
For me the last, v2 patch applies (with some hunk) to 3.7.10 and compiles
fine.
Thanks,
martin
Eric W. Biederman wrote:
> From: Vlad Yasevich <vyasevich@gmail.com>
> Date: Thu, 24 Jan 2013 11:02:47 -0500
>
> Per-net sysctl table needs to be explicitly freed at
> net exit. Otherwise we see the following with kmemleak:
>
> unreferenced object 0xffff880402d08000 (size 2048):
> comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
> hex dump (first 32 bytes):
> b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
> 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
> backtrace:
> [<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
> [<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
> [<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
> [<ffffffff810f10c2>] kmemdup+0x1b/0x30
> [<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
> [<ffffffff8155d305>] sctp_net_init+0x100/0x39f
> [<ffffffff814ad53c>] ops_init+0xc6/0xf5
> [<ffffffff814ad5b7>] setup_net+0x4c/0xd0
> [<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
> [<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
> [<ffffffff810939f4>] copy_namespaces+0x63/0x99
> [<ffffffff81076733>] copy_process+0xa65/0x1233
> [<ffffffff81077030>] do_fork+0x10b/0x271
> [<ffffffff8100a0e9>] sys_clone+0x23/0x25
> [<ffffffff815dda73>] stub_clone+0x13/0x20
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> I fixed the spelling of sysctl_header so the code actually
> compiles. -- EWB.
>
> Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
> Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
> Acked-by: Neil Horman <nhorman@tuxdriver.com>
> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
> ---
>
> The typo is fixed in the patch this time in addition to my test
> tree.
>
> net/sctp/sysctl.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
> index 043889a..bf3c6e8 100644
> --- a/net/sctp/sysctl.c
> +++ b/net/sctp/sysctl.c
> @@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
>
> void sctp_sysctl_net_unregister(struct net *net)
> {
> + struct ctl_table *table;
> +
> + table = net->sctp.sysctl_header->ctl_table_arg;
> unregister_net_sysctl_table(net->sctp.sysctl_header);
> + kfree(table);
> }
>
> static struct ctl_table_header * sctp_sysctl_header;
>
^ permalink raw reply [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-03-05 9:05 ` Martin Mokrejs
0 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-03-05 9:05 UTC (permalink / raw)
To: Eric W. Biederman; +Cc: David Miller, vyasevich, netdev, linux-sctp, stable
Hi,
this is to let you know that this patch is still not in stable.
I just fetched 3.7.10 and reproduced the original problem.
I bet this slipped through because there was an initial patch from Vlad Yasevich
on Jan 24, then a follow-up patch from Eric Biedermann which did not compile and
finally a v2 patch from E. B which did compile.
For me the last, v2 patch applies (with some hunk) to 3.7.10 and compiles
fine.
Thanks,
martin
Eric W. Biederman wrote:
> From: Vlad Yasevich <vyasevich@gmail.com>
> Date: Thu, 24 Jan 2013 11:02:47 -0500
>
> Per-net sysctl table needs to be explicitly freed at
> net exit. Otherwise we see the following with kmemleak:
>
> unreferenced object 0xffff880402d08000 (size 2048):
> comm "chrome_sandbox", pid 18437, jiffies 4310887172 (age 9097.630s)
> hex dump (first 32 bytes):
> b2 68 89 81 ff ff ff ff 20 04 04 f8 01 88 ff ff .h...... .......
> 04 00 00 00 a4 01 00 00 00 00 00 00 00 00 00 00 ................
> backtrace:
> [<ffffffff815b4aad>] kmemleak_alloc+0x21/0x3e
> [<ffffffff81110352>] slab_post_alloc_hook+0x28/0x2a
> [<ffffffff81113fad>] __kmalloc_track_caller+0xf1/0x104
> [<ffffffff810f10c2>] kmemdup+0x1b/0x30
> [<ffffffff81571e9f>] sctp_sysctl_net_register+0x1f/0x72
> [<ffffffff8155d305>] sctp_net_init+0x100/0x39f
> [<ffffffff814ad53c>] ops_init+0xc6/0xf5
> [<ffffffff814ad5b7>] setup_net+0x4c/0xd0
> [<ffffffff814ada5e>] copy_net_ns+0x6d/0xd6
> [<ffffffff810938b1>] create_new_namespaces+0xd7/0x147
> [<ffffffff810939f4>] copy_namespaces+0x63/0x99
> [<ffffffff81076733>] copy_process+0xa65/0x1233
> [<ffffffff81077030>] do_fork+0x10b/0x271
> [<ffffffff8100a0e9>] sys_clone+0x23/0x25
> [<ffffffff815dda73>] stub_clone+0x13/0x20
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> I fixed the spelling of sysctl_header so the code actually
> compiles. -- EWB.
>
> Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
> Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
> Acked-by: Neil Horman <nhorman@tuxdriver.com>
> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
> ---
>
> The typo is fixed in the patch this time in addition to my test
> tree.
>
> net/sctp/sysctl.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
> index 043889a..bf3c6e8 100644
> --- a/net/sctp/sysctl.c
> +++ b/net/sctp/sysctl.c
> @@ -366,7 +366,11 @@ int sctp_sysctl_net_register(struct net *net)
>
> void sctp_sysctl_net_unregister(struct net *net)
> {
> + struct ctl_table *table;
> +
> + table = net->sctp.sysctl_header->ctl_table_arg;
> unregister_net_sysctl_table(net->sctp.sysctl_header);
> + kfree(table);
> }
>
> static struct ctl_table_header * sctp_sysctl_header;
>
^ permalink raw reply [flat|nested] 34+ messages in thread* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-03-05 9:05 ` Martin Mokrejs
@ 2013-03-05 19:32 ` David Miller
-1 siblings, 0 replies; 34+ messages in thread
From: David Miller @ 2013-03-05 19:32 UTC (permalink / raw)
To: mmokrejs; +Cc: ebiederm, vyasevich, netdev, linux-sctp, stable
From: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Date: Tue, 05 Mar 2013 10:05:06 +0100
> this is to let you know that this patch is still not in stable.
> I just fetched 3.7.10 and reproduced the original problem.
3.7.x is end of life and no longer being actively maintained.
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-03-05 19:32 ` David Miller
0 siblings, 0 replies; 34+ messages in thread
From: David Miller @ 2013-03-05 19:32 UTC (permalink / raw)
To: mmokrejs; +Cc: ebiederm, vyasevich, netdev, linux-sctp, stable
From: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Date: Tue, 05 Mar 2013 10:05:06 +0100
> this is to let you know that this patch is still not in stable.
> I just fetched 3.7.10 and reproduced the original problem.
3.7.x is end of life and no longer being actively maintained.
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-03-05 19:32 ` David Miller
@ 2013-03-05 21:04 ` Martin Mokrejs
-1 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-03-05 21:04 UTC (permalink / raw)
To: David Miller; +Cc: ebiederm, vyasevich, netdev, linux-sctp, stable
David Miller wrote:
> From: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
> Date: Tue, 05 Mar 2013 10:05:06 +0100
>
>> this is to let you know that this patch is still not in stable.
>> I just fetched 3.7.10 and reproduced the original problem.
>
> 3.7.x is end of life and no longer being actively maintained.
??? 3.7.10 was released on 2013-02-27.
I disagree with making a kernel line 3.7 released on 2012-12-11 unsupported
while 3.8.0 was released just on 2013-02-18. That is way too new. Sorry
to say that but I don't expect 3.8 to be tested properly like 3.7.4 was
NOT in January 2013 when I reported the particular sctp bug, and several
others in USB, pci/e hotplug, etc. Now, with 3.8.2 being out one day
already I will hit for sure other bugs. I really want something stable.
For USB3.0 I need 3.2.x at least, actually 3.5 for some better URB handling
... The already buggy (in 3.2.x PCI/e hotplug) got reworked in about 3.5
into another buggy behavior so another workaround had to be invented.
Of course I do appreciate your work but if somebody bothered to report a bug
and some devs bothered to provide patches, you should let the fix go into life.
It is waiting in the patchwork since 1,5 month. By that time, 3.7.x was the
current, latest&greatest stable. I just don't agree.
Sorry for such a rant, I couldn't resist. ;)
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-03-05 21:04 ` Martin Mokrejs
0 siblings, 0 replies; 34+ messages in thread
From: Martin Mokrejs @ 2013-03-05 21:04 UTC (permalink / raw)
To: David Miller; +Cc: ebiederm, vyasevich, netdev, linux-sctp, stable
David Miller wrote:
> From: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
> Date: Tue, 05 Mar 2013 10:05:06 +0100
>
>> this is to let you know that this patch is still not in stable.
>> I just fetched 3.7.10 and reproduced the original problem.
>
> 3.7.x is end of life and no longer being actively maintained.
??? 3.7.10 was released on 2013-02-27.
I disagree with making a kernel line 3.7 released on 2012-12-11 unsupported
while 3.8.0 was released just on 2013-02-18. That is way too new. Sorry
to say that but I don't expect 3.8 to be tested properly like 3.7.4 was
NOT in January 2013 when I reported the particular sctp bug, and several
others in USB, pci/e hotplug, etc. Now, with 3.8.2 being out one day
already I will hit for sure other bugs. I really want something stable.
For USB3.0 I need 3.2.x at least, actually 3.5 for some better URB handling
... The already buggy (in 3.2.x PCI/e hotplug) got reworked in about 3.5
into another buggy behavior so another workaround had to be invented.
Of course I do appreciate your work but if somebody bothered to report a bug
and some devs bothered to provide patches, you should let the fix go into life.
It is waiting in the patchwork since 1,5 month. By that time, 3.7.x was the
current, latest&greatest stable. I just don't agree.
Sorry for such a rant, I couldn't resist. ;)
Martin
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
2013-03-05 21:04 ` Martin Mokrejs
@ 2013-03-05 21:08 ` David Miller
-1 siblings, 0 replies; 34+ messages in thread
From: David Miller @ 2013-03-05 21:08 UTC (permalink / raw)
To: mmokrejs; +Cc: ebiederm, vyasevich, netdev, linux-sctp, stable
From: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Date: Tue, 05 Mar 2013 22:04:05 +0100
> Sorry for such a rant, I couldn't resist. ;)
Thankfully none of the stable maintainers had to actually read your
rant because you got the stable address wrong.
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH] SCTP: Free the per-net sysctl table on net exit. v2
@ 2013-03-05 21:08 ` David Miller
0 siblings, 0 replies; 34+ messages in thread
From: David Miller @ 2013-03-05 21:08 UTC (permalink / raw)
To: mmokrejs; +Cc: ebiederm, vyasevich, netdev, linux-sctp, stable
From: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Date: Tue, 05 Mar 2013 22:04:05 +0100
> Sorry for such a rant, I couldn't resist. ;)
Thankfully none of the stable maintainers had to actually read your
rant because you got the stable address wrong.
^ permalink raw reply [flat|nested] 34+ messages in thread
end of thread, other threads:[~2013-03-05 21:08 UTC | newest]
Thread overview: 34+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-01-23 20:59 linux-3.7.4: kmemleak in sctp_sysctl_net_register()? Martin Mokrejs
2013-01-23 20:59 ` Martin Mokrejs
2013-01-24 16:02 ` [PATCH] SCTP: Free the per-net sysctl table on net exit Vlad Yasevich
2013-01-24 16:02 ` Vlad Yasevich
2013-01-24 16:44 ` Neil Horman
2013-01-24 16:44 ` Neil Horman
2013-01-24 22:14 ` Eric W. Biederman
2013-01-24 22:14 ` Eric W. Biederman
2013-01-28 0:35 ` David Miller
2013-01-28 0:35 ` David Miller
2013-01-28 1:58 ` Eric W. Biederman
2013-01-28 1:58 ` Eric W. Biederman
2013-01-28 3:25 ` [PATCH] SCTP: Free the per-net sysctl table on net exit. v2 Eric W. Biederman
2013-01-28 3:25 ` Eric W. Biederman
2013-01-28 5:11 ` David Miller
2013-01-28 5:11 ` David Miller
2013-01-28 8:33 ` Martin Mokrejs
2013-01-28 8:33 ` Martin Mokrejs
2013-01-28 15:47 ` Eric W. Biederman
2013-01-28 15:47 ` Eric W. Biederman
2013-01-28 21:17 ` Martin Mokrejs
2013-01-28 21:17 ` Martin Mokrejs
2013-01-28 21:25 ` Martin Mokrejs
2013-01-28 21:25 ` Martin Mokrejs
2013-01-29 0:20 ` Eric W. Biederman
2013-01-29 0:20 ` Eric W. Biederman
2013-03-05 9:05 ` Martin Mokrejs
2013-03-05 9:05 ` Martin Mokrejs
2013-03-05 19:32 ` David Miller
2013-03-05 19:32 ` David Miller
2013-03-05 21:04 ` Martin Mokrejs
2013-03-05 21:04 ` Martin Mokrejs
2013-03-05 21:08 ` David Miller
2013-03-05 21:08 ` David Miller
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