* [PATCH] audit: destroy filename correctly
@ 2013-04-01 7:00 Dmitry Monakhov
2013-04-10 17:07 ` Jeff Layton
2013-04-22 8:08 ` [PATCH] audit: destroy filename correctly PING Dmitry Monakhov
0 siblings, 2 replies; 4+ messages in thread
From: Dmitry Monakhov @ 2013-04-01 7:00 UTC (permalink / raw)
To: linux-kernel; +Cc: viro, eparis, Dmitry Monakhov
filename should be destroyed via final_putname() instead of __putname()
Otherwise this result in following BUGON() in case of long names:
kernel BUG at mm/slab.c:3006!
Call Trace:
kmem_cache_free+0x1c1/0x850
audit_putname+0x88/0x90
putname+0x73/0x80
sys_symlinkat+0x120/0x150
sys_symlink+0x16/0x20
system_call_fastpath+0x16/0x1b
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
---
kernel/auditsc.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index a371f85..bfe7ca6 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1010,7 +1010,7 @@ static inline void audit_free_names(struct audit_context *context)
list_for_each_entry_safe(n, next, &context->names_list, list) {
list_del(&n->list);
if (n->name && n->name_put)
- __putname(n->name);
+ final_putname(n->name);
if (n->should_free)
kfree(n);
}
@@ -2036,7 +2036,7 @@ void audit_putname(struct filename *name)
BUG_ON(!context);
if (!context->in_syscall) {
#if AUDIT_DEBUG == 2
- printk(KERN_ERR "%s:%d(:%d): __putname(%p)\n",
+ printk(KERN_ERR "%s:%d(:%d): final_putname(%p)\n",
__FILE__, __LINE__, context->serial, name);
if (context->name_count) {
struct audit_names *n;
@@ -2047,7 +2047,7 @@ void audit_putname(struct filename *name)
n->name, n->name->name ?: "(null)");
}
#endif
- __putname(name);
+ final_putname(name);
}
#if AUDIT_DEBUG
else {
--
1.7.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] audit: destroy filename correctly
2013-04-01 7:00 [PATCH] audit: destroy filename correctly Dmitry Monakhov
@ 2013-04-10 17:07 ` Jeff Layton
2013-04-22 8:08 ` [PATCH] audit: destroy filename correctly PING Dmitry Monakhov
1 sibling, 0 replies; 4+ messages in thread
From: Jeff Layton @ 2013-04-10 17:07 UTC (permalink / raw)
To: Dmitry Monakhov; +Cc: linux-kernel
On Mon, 1 Apr 2013 11:00:00 +0400
Dmitry Monakhov <dmonakhov@openvz.org> wrote:
> filename should be destroyed via final_putname() instead of __putname()
> Otherwise this result in following BUGON() in case of long names:
> kernel BUG at mm/slab.c:3006!
> Call Trace:
> kmem_cache_free+0x1c1/0x850
> audit_putname+0x88/0x90
> putname+0x73/0x80
> sys_symlinkat+0x120/0x150
> sys_symlink+0x16/0x20
> system_call_fastpath+0x16/0x1b
>
> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
> ---
> kernel/auditsc.c | 6 +++---
> 1 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/auditsc.c b/kernel/auditsc.c
> index a371f85..bfe7ca6 100644
> --- a/kernel/auditsc.c
> +++ b/kernel/auditsc.c
> @@ -1010,7 +1010,7 @@ static inline void audit_free_names(struct audit_context *context)
> list_for_each_entry_safe(n, next, &context->names_list, list) {
> list_del(&n->list);
> if (n->name && n->name_put)
> - __putname(n->name);
> + final_putname(n->name);
> if (n->should_free)
> kfree(n);
> }
> @@ -2036,7 +2036,7 @@ void audit_putname(struct filename *name)
> BUG_ON(!context);
> if (!context->in_syscall) {
> #if AUDIT_DEBUG == 2
> - printk(KERN_ERR "%s:%d(:%d): __putname(%p)\n",
> + printk(KERN_ERR "%s:%d(:%d): final_putname(%p)\n",
> __FILE__, __LINE__, context->serial, name);
> if (context->name_count) {
> struct audit_names *n;
> @@ -2047,7 +2047,7 @@ void audit_putname(struct filename *name)
> n->name, n->name->name ?: "(null)");
> }
> #endif
> - __putname(name);
> + final_putname(name);
> }
> #if AUDIT_DEBUG
> else {
Looks correct to me...
Reviewed-by: Jeff Layton <jlayton@redhat.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] audit: destroy filename correctly PING.
2013-04-01 7:00 [PATCH] audit: destroy filename correctly Dmitry Monakhov
2013-04-10 17:07 ` Jeff Layton
@ 2013-04-22 8:08 ` Dmitry Monakhov
2013-04-23 14:24 ` Eric Paris
1 sibling, 1 reply; 4+ messages in thread
From: Dmitry Monakhov @ 2013-04-22 8:08 UTC (permalink / raw)
To: linux-kernel; +Cc: viro, eparis, linux-audit
On Mon, 1 Apr 2013 11:00:00 +0400, Dmitry Monakhov <dmonakhov@openvz.org> wrote:
Ping. Patch (https://lkml.org/lkml/2013/4/1/65) was not a 1'st April's joke.
Add CC:linux-audit@redhat.com
> filename should be destroyed via final_putname() instead of __putname()
> Otherwise this result in following BUGON() in case of long names:
> kernel BUG at mm/slab.c:3006!
> Call Trace:
> kmem_cache_free+0x1c1/0x850
> audit_putname+0x88/0x90
> putname+0x73/0x80
> sys_symlinkat+0x120/0x150
> sys_symlink+0x16/0x20
> system_call_fastpath+0x16/0x1b
>
> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
> ---
> kernel/auditsc.c | 6 +++---
> 1 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/auditsc.c b/kernel/auditsc.c
> index a371f85..bfe7ca6 100644
> --- a/kernel/auditsc.c
> +++ b/kernel/auditsc.c
> @@ -1010,7 +1010,7 @@ static inline void audit_free_names(struct audit_context *context)
> list_for_each_entry_safe(n, next, &context->names_list, list) {
> list_del(&n->list);
> if (n->name && n->name_put)
> - __putname(n->name);
> + final_putname(n->name);
> if (n->should_free)
> kfree(n);
> }
> @@ -2036,7 +2036,7 @@ void audit_putname(struct filename *name)
> BUG_ON(!context);
> if (!context->in_syscall) {
> #if AUDIT_DEBUG == 2
> - printk(KERN_ERR "%s:%d(:%d): __putname(%p)\n",
> + printk(KERN_ERR "%s:%d(:%d): final_putname(%p)\n",
> __FILE__, __LINE__, context->serial, name);
> if (context->name_count) {
> struct audit_names *n;
> @@ -2047,7 +2047,7 @@ void audit_putname(struct filename *name)
> n->name, n->name->name ?: "(null)");
> }
> #endif
> - __putname(name);
> + final_putname(name);
> }
> #if AUDIT_DEBUG
> else {
> --
> 1.7.1
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] audit: destroy filename correctly PING.
2013-04-22 8:08 ` [PATCH] audit: destroy filename correctly PING Dmitry Monakhov
@ 2013-04-23 14:24 ` Eric Paris
0 siblings, 0 replies; 4+ messages in thread
From: Eric Paris @ 2013-04-23 14:24 UTC (permalink / raw)
To: Dmitry Monakhov; +Cc: linux-kernel, viro, linux-audit
I picked it up for 3.10. Sorry, should have said something. Thanks!
-Eric
----- Original Message -----
> On Mon, 1 Apr 2013 11:00:00 +0400, Dmitry Monakhov <dmonakhov@openvz.org>
> wrote:
> Ping. Patch (https://lkml.org/lkml/2013/4/1/65) was not a 1'st April's joke.
> Add CC:linux-audit@redhat.com
> > filename should be destroyed via final_putname() instead of __putname()
> > Otherwise this result in following BUGON() in case of long names:
> > kernel BUG at mm/slab.c:3006!
> > Call Trace:
> > kmem_cache_free+0x1c1/0x850
> > audit_putname+0x88/0x90
> > putname+0x73/0x80
> > sys_symlinkat+0x120/0x150
> > sys_symlink+0x16/0x20
> > system_call_fastpath+0x16/0x1b
> >
> > Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
> > ---
> > kernel/auditsc.c | 6 +++---
> > 1 files changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/kernel/auditsc.c b/kernel/auditsc.c
> > index a371f85..bfe7ca6 100644
> > --- a/kernel/auditsc.c
> > +++ b/kernel/auditsc.c
> > @@ -1010,7 +1010,7 @@ static inline void audit_free_names(struct
> > audit_context *context)
> > list_for_each_entry_safe(n, next, &context->names_list, list) {
> > list_del(&n->list);
> > if (n->name && n->name_put)
> > - __putname(n->name);
> > + final_putname(n->name);
> > if (n->should_free)
> > kfree(n);
> > }
> > @@ -2036,7 +2036,7 @@ void audit_putname(struct filename *name)
> > BUG_ON(!context);
> > if (!context->in_syscall) {
> > #if AUDIT_DEBUG == 2
> > - printk(KERN_ERR "%s:%d(:%d): __putname(%p)\n",
> > + printk(KERN_ERR "%s:%d(:%d): final_putname(%p)\n",
> > __FILE__, __LINE__, context->serial, name);
> > if (context->name_count) {
> > struct audit_names *n;
> > @@ -2047,7 +2047,7 @@ void audit_putname(struct filename *name)
> > n->name, n->name->name ?: "(null)");
> > }
> > #endif
> > - __putname(name);
> > + final_putname(name);
> > }
> > #if AUDIT_DEBUG
> > else {
> > --
> > 1.7.1
> >
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-04-23 14:24 UTC | newest]
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2013-04-01 7:00 [PATCH] audit: destroy filename correctly Dmitry Monakhov
2013-04-10 17:07 ` Jeff Layton
2013-04-22 8:08 ` [PATCH] audit: destroy filename correctly PING Dmitry Monakhov
2013-04-23 14:24 ` Eric Paris
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