* Re: [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
[not found] <000000000000657ecd0614456af8@google.com>
@ 2024-09-27 18:26 ` syzbot
2024-10-08 1:44 ` syzbot
1 sibling, 0 replies; 6+ messages in thread
From: syzbot @ 2024-09-27 18:26 UTC (permalink / raw)
To: davem, dkirjanov, edumazet, jgg, kirjanov, kuba, leon,
linux-kernel, linux-rdma, naveenm, netdev, pabeni, rkannoth,
syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: d505d3593b52 net: wwan: qcom_bam_dmux: Fix missing pm_runt..
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=105286a9980000
kernel config: https://syzkaller.appspot.com/x/.config?x=b2d4fdf18a83ec0b
dashboard link: https://syzkaller.appspot.com/bug?extid=5fe14f2ff4ccbace9a26
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150d959f980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0286a1cf90df/disk-d505d359.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b573fa96ab33/vmlinux-d505d359.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cdd9993102ed/bzImage-d505d359.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5fe14f2ff4ccbace9a26@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x6e/0x190 net/ethtool/ioctl.c:442
Read of size 8 at addr ffff88806ea3a308 by task kworker/1:1/60
CPU: 1 UID: 0 PID: 60 Comm: kworker/1:1 Not tainted 6.11.0-syzkaller-11503-gd505d3593b52 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events smc_ib_port_event_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
__ethtool_get_link_ksettings+0x6e/0x190 net/ethtool/ioctl.c:442
ib_get_eth_speed+0x160/0x800 drivers/infiniband/core/verbs.c:1996
rxe_query_port+0x76/0x260 drivers/infiniband/sw/rxe/rxe_verbs.c:55
__ib_query_port drivers/infiniband/core/device.c:2111 [inline]
ib_query_port+0x166/0x7d0 drivers/infiniband/core/device.c:2143
smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
smc_ib_port_event_work+0x14e/0xa50 net/smc/smc_ib.c:388
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 5335:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:257 [inline]
__do_kmalloc_node mm/slub.c:4265 [inline]
__kmalloc_node_noprof+0x22a/0x440 mm/slub.c:4271
__kvmalloc_node_noprof+0x72/0x190 mm/util.c:658
alloc_netdev_mqs+0x9b/0x1000 net/core/dev.c:11093
rtnl_create_link+0x2f9/0xc20 net/core/rtnetlink.c:3374
rtnl_newlink_create net/core/rtnetlink.c:3500 [inline]
__rtnl_newlink net/core/rtnetlink.c:3730 [inline]
rtnl_newlink+0x1423/0x20a0 net/core/rtnetlink.c:3743
rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6646
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
__sys_sendto+0x39b/0x4f0 net/socket.c:2210
__do_sys_sendto net/socket.c:2222 [inline]
__se_sys_sendto net/socket.c:2218 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2218
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 1583:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2343 [inline]
slab_free mm/slub.c:4580 [inline]
kfree+0x1a0/0x440 mm/slub.c:4728
device_release+0x99/0x1c0
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x22f/0x480 lib/kobject.c:737
netdev_run_todo+0xe79/0x1000 net/core/dev.c:10812
default_device_exit_batch+0xa24/0xaa0 net/core/dev.c:11945
ops_exit_list net/core/net_namespace.c:178 [inline]
cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:626
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the object at ffff88806ea3a000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 776 bytes inside of
freed 4096-byte region [ffff88806ea3a000, ffff88806ea3b000)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6ea38
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88802c1c9001
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac4f500 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000001f5000000 ffff88802c1c9001
head: 00fff00000000040 ffff88801ac4f500 dead000000000122 0000000000000000
head: 0000000000000000 0000000000040004 00000001f5000000 ffff88802c1c9001
head: 00fff00000000003 ffffea0001ba8e01 ffffffffffffffff 0000000000000000
head: 0000000700000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5335, tgid 5335 (syz-executor), ts 184149259579, free_ts 182141357499
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1545 [inline]
get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
alloc_slab_page+0x6a/0x120 mm/slub.c:2413
allocate_slab+0x5a/0x2f0 mm/slub.c:2579
new_slab mm/slub.c:2632 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819
__slab_alloc+0x58/0xa0 mm/slub.c:3909
__slab_alloc_node mm/slub.c:3962 [inline]
slab_alloc_node mm/slub.c:4123 [inline]
__do_kmalloc_node mm/slub.c:4264 [inline]
__kmalloc_noprof+0x25a/0x400 mm/slub.c:4277
kmalloc_noprof include/linux/slab.h:882 [inline]
kzalloc_noprof include/linux/slab.h:1014 [inline]
__register_sysctl_table+0x65/0x1550 fs/proc/proc_sysctl.c:1368
__addrconf_sysctl_register+0x234/0x3a0 net/ipv6/addrconf.c:7224
addrconf_sysctl_register+0x167/0x1c0 net/ipv6/addrconf.c:7272
ipv6_add_dev+0xcf6/0x1220 net/ipv6/addrconf.c:456
addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3655
notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
call_netdevice_notifiers net/core/dev.c:2048 [inline]
register_netdevice+0x167f/0x1b00 net/core/dev.c:10520
page last free pid 5308 tgid 5308 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1108 [inline]
free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638
vfree+0x186/0x2e0 mm/vmalloc.c:3361
kcov_put kernel/kcov.c:439 [inline]
kcov_close+0x28/0x50 kernel/kcov.c:535
__fput+0x23f/0x880 fs/file_table.c:431
task_work_run+0x24f/0x310 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xa2f/0x28e0 kernel/exit.c:939
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
get_signal+0x176f/0x1810 kernel/signal.c:2936
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88806ea3a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88806ea3a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88806ea3a300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88806ea3a380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88806ea3a400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
[not found] <000000000000657ecd0614456af8@google.com>
2024-09-27 18:26 ` [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings syzbot
@ 2024-10-08 1:44 ` syzbot
2024-10-08 11:44 ` Leon Romanovsky
2024-10-08 11:51 ` Leon Romanovsky
1 sibling, 2 replies; 6+ messages in thread
From: syzbot @ 2024-10-08 1:44 UTC (permalink / raw)
To: ahmed.zaki, andrew, boqun.feng, cmeiohas, davem, dkirjanov,
ecree.xilinx, edumazet, hdanton, jgg, kalesh-anakkur.purayil,
kirjanov, kuba, leon, linux-kernel, linux-rdma, michaelgur,
msanalla, naveenm, netdev, pabeni, penguin-kernel,
przemyslaw.kitszel, rkannoth, syzkaller-bugs, torvalds
syzbot has bisected this issue to:
commit 5f8ca04fdd3c66a322ea318b5f1cb684dd56e5b2
Author: Chiara Meiohas <cmeiohas@nvidia.com>
Date: Mon Sep 9 17:30:22 2024 +0000
RDMA/device: Remove optimization in ib_device_get_netdev()
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16db2327980000
start commit: c4a14f6d9d17 ipv4: ip_gre: Fix drops of small packets in i..
git tree: net
final oops: https://syzkaller.appspot.com/x/report.txt?x=15db2327980000
console output: https://syzkaller.appspot.com/x/log.txt?x=11db2327980000
kernel config: https://syzkaller.appspot.com/x/.config?x=b2d4fdf18a83ec0b
dashboard link: https://syzkaller.appspot.com/bug?extid=5fe14f2ff4ccbace9a26
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11eca3d0580000
Reported-by: syzbot+5fe14f2ff4ccbace9a26@syzkaller.appspotmail.com
Fixes: 5f8ca04fdd3c ("RDMA/device: Remove optimization in ib_device_get_netdev()")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
2024-10-08 1:44 ` syzbot
@ 2024-10-08 11:44 ` Leon Romanovsky
2024-10-08 12:02 ` syzbot
2024-10-08 11:51 ` Leon Romanovsky
1 sibling, 1 reply; 6+ messages in thread
From: Leon Romanovsky @ 2024-10-08 11:44 UTC (permalink / raw)
To: syzbot; +Cc: linux-rdma
On Mon, Oct 07, 2024 at 06:44:02PM -0700, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 5f8ca04fdd3c66a322ea318b5f1cb684dd56e5b2
> Author: Chiara Meiohas <cmeiohas@nvidia.com>
> Date: Mon Sep 9 17:30:22 2024 +0000
>
> RDMA/device: Remove optimization in ib_device_get_netdev()
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16db2327980000
> start commit: c4a14f6d9d17 ipv4: ip_gre: Fix drops of small packets in i..
> git tree: net
> final oops: https://syzkaller.appspot.com/x/report.txt?x=15db2327980000
> console output: https://syzkaller.appspot.com/x/log.txt?x=11db2327980000
> kernel config: https://syzkaller.appspot.com/x/.config?x=b2d4fdf18a83ec0b
> dashboard link: https://syzkaller.appspot.com/bug?extid=5fe14f2ff4ccbace9a26
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11eca3d0580000
>
> Reported-by: syzbot+5fe14f2ff4ccbace9a26@syzkaller.appspotmail.com
> Fixes: 5f8ca04fdd3c ("RDMA/device: Remove optimization in ib_device_get_netdev()")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index e029401b5680..f56085b928a4 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2070,10 +2070,6 @@ static int iw_query_port(struct ib_device *device,
memset(port_attr, 0, sizeof(*port_attr));
- netdev = ib_device_get_netdev(device, port_num);
- if (!netdev)
- return -ENODEV;
-
port_attr->max_mtu = IB_MTU_4096;
port_attr->active_mtu = ib_mtu_int_to_enum(netdev->mtu);
@@ -2096,7 +2092,6 @@ static int iw_query_port(struct ib_device *device,
rcu_read_unlock();
}
- dev_put(netdev);
return device->ops.query_port(device, port_num, port_attr);
}
@@ -2134,13 +2129,27 @@ int ib_query_port(struct ib_device *device,
u32 port_num,
struct ib_port_attr *port_attr)
{
+ struct net_device *netdev = NULL;
+ int ret;
+
if (!rdma_is_port_valid(device, port_num))
return -EINVAL;
+ if (rdma_protocol_iwarp(device, port_num) ||
+ rdma_protocol_roce(device, port_num)) {
+ netdev = ib_device_get_netdev(device, port_num);
+ if (!netdev)
+ return -ENODEV;
+ }
+
if (rdma_protocol_iwarp(device, port_num))
- return iw_query_port(device, port_num, port_attr);
+ ret = iw_query_port(device, port_num, port_attr);
else
- return __ib_query_port(device, port_num, port_attr);
+ ret = __ib_query_port(device, port_num, port_attr);
+ if (netdev)
+ dev_put(netdev);
+ return ret;
+
}
EXPORT_SYMBOL(ib_query_port);
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
2024-10-08 1:44 ` syzbot
2024-10-08 11:44 ` Leon Romanovsky
@ 2024-10-08 11:51 ` Leon Romanovsky
2024-10-08 12:24 ` syzbot
1 sibling, 1 reply; 6+ messages in thread
From: Leon Romanovsky @ 2024-10-08 11:51 UTC (permalink / raw)
To: syzbot; +Cc: linux-rdma
On Mon, Oct 07, 2024 at 06:44:02PM -0700, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 5f8ca04fdd3c66a322ea318b5f1cb684dd56e5b2
> Author: Chiara Meiohas <cmeiohas@nvidia.com>
> Date: Mon Sep 9 17:30:22 2024 +0000
>
> RDMA/device: Remove optimization in ib_device_get_netdev()
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16db2327980000
> start commit: c4a14f6d9d17 ipv4: ip_gre: Fix drops of small packets in i..
> git tree: net
> final oops: https://syzkaller.appspot.com/x/report.txt?x=15db2327980000
> console output: https://syzkaller.appspot.com/x/log.txt?x=11db2327980000
> kernel config: https://syzkaller.appspot.com/x/.config?x=b2d4fdf18a83ec0b
> dashboard link: https://syzkaller.appspot.com/bug?extid=5fe14f2ff4ccbace9a26
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11eca3d0580000
>
> Reported-by: syzbot+5fe14f2ff4ccbace9a26@syzkaller.appspotmail.com
> Fixes: 5f8ca04fdd3c ("RDMA/device: Remove optimization in ib_device_get_netdev()")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index e029401b5680..0b7e5245ffbc 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2061,19 +2061,14 @@ void ib_dispatch_event_clients(struct ib_event *event)
up_read(&event->device->event_handler_rwsem);
}
-static int iw_query_port(struct ib_device *device,
- u32 port_num,
- struct ib_port_attr *port_attr)
+static int iw_query_port(struct ib_device *device, u32 port_num,
+ struct ib_port_attr *port_attr,
+ struct net_device *netdev)
{
struct in_device *inetdev;
- struct net_device *netdev;
memset(port_attr, 0, sizeof(*port_attr));
- netdev = ib_device_get_netdev(device, port_num);
- if (!netdev)
- return -ENODEV;
-
port_attr->max_mtu = IB_MTU_4096;
port_attr->active_mtu = ib_mtu_int_to_enum(netdev->mtu);
@@ -2096,7 +2091,6 @@ static int iw_query_port(struct ib_device *device,
rcu_read_unlock();
}
- dev_put(netdev);
return device->ops.query_port(device, port_num, port_attr);
}
@@ -2134,13 +2128,27 @@ int ib_query_port(struct ib_device *device,
u32 port_num,
struct ib_port_attr *port_attr)
{
+ struct net_device *netdev = NULL;
+ int ret;
+
if (!rdma_is_port_valid(device, port_num))
return -EINVAL;
+ if (rdma_protocol_iwarp(device, port_num) ||
+ rdma_protocol_roce(device, port_num)) {
+ netdev = ib_device_get_netdev(device, port_num);
+ if (!netdev)
+ return -ENODEV;
+ }
+
if (rdma_protocol_iwarp(device, port_num))
- return iw_query_port(device, port_num, port_attr);
+ ret = iw_query_port(device, port_num, port_attr, netdev);
else
- return __ib_query_port(device, port_num, port_attr);
+ ret = __ib_query_port(device, port_num, port_attr);
+ if (netdev)
+ dev_put(netdev);
+ return ret;
+
}
EXPORT_SYMBOL(ib_query_port);
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
2024-10-08 11:44 ` Leon Romanovsky
@ 2024-10-08 12:02 ` syzbot
0 siblings, 0 replies; 6+ messages in thread
From: syzbot @ 2024-10-08 12:02 UTC (permalink / raw)
To: leon, linux-kernel, linux-rdma, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x6e/0x190 net/ethtool/ioctl.c:442
Read of size 8 at addr ffff88807c76c308 by task kworker/1:2/1171
CPU: 1 UID: 0 PID: 1171 Comm: kworker/1:2 Not tainted 6.12.0-rc2-syzkaller-g615b94746a54-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events smc_ib_port_event_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
__ethtool_get_link_ksettings+0x6e/0x190 net/ethtool/ioctl.c:442
ib_get_eth_speed+0x160/0x800 drivers/infiniband/core/verbs.c:1996
rxe_query_port+0x76/0x260 drivers/infiniband/sw/rxe/rxe_verbs.c:55
__ib_query_port drivers/infiniband/core/device.c:2106 [inline]
ib_query_port+0x201/0x850 drivers/infiniband/core/device.c:2148
smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
smc_ib_port_event_work+0x14e/0xa50 net/smc/smc_ib.c:388
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 5797:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:257 [inline]
__do_kmalloc_node mm/slub.c:4264 [inline]
__kmalloc_node_noprof+0x22a/0x440 mm/slub.c:4270
__kvmalloc_node_noprof+0x72/0x190 mm/util.c:658
alloc_netdev_mqs+0x9b/0x1000 net/core/dev.c:11097
rtnl_create_link+0x2f9/0xc20 net/core/rtnetlink.c:3374
rtnl_newlink_create net/core/rtnetlink.c:3500 [inline]
__rtnl_newlink net/core/rtnetlink.c:3730 [inline]
rtnl_newlink+0x1423/0x20a0 net/core/rtnetlink.c:3743
rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6646
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:744
__sys_sendto+0x39b/0x4f0 net/socket.c:2209
__do_sys_sendto net/socket.c:2221 [inline]
__se_sys_sendto net/socket.c:2217 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2217
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 190:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2342 [inline]
slab_free mm/slub.c:4579 [inline]
kfree+0x1a0/0x440 mm/slub.c:4727
device_release+0x99/0x1c0
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x22f/0x480 lib/kobject.c:737
netdev_run_todo+0xe79/0x1000 net/core/dev.c:10816
default_device_exit_batch+0xa24/0xaa0 net/core/dev.c:11949
ops_exit_list net/core/net_namespace.c:178 [inline]
cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:626
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the object at ffff88807c76c000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 776 bytes inside of
freed 4096-byte region [ffff88807c76c000, ffff88807c76d000)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c768
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88802ce8e201
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac4f500 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000001f5000000 ffff88802ce8e201
head: 00fff00000000040 ffff88801ac4f500 dead000000000122 0000000000000000
head: 0000000000000000 0000000000040004 00000001f5000000 ffff88802ce8e201
head: 00fff00000000003 ffffea0001f1da01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5797, tgid 5797 (syz-executor), ts 104351453577, free_ts 104328010992
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1545 [inline]
get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
alloc_slab_page+0x6a/0x120 mm/slub.c:2412
allocate_slab+0x5a/0x2f0 mm/slub.c:2578
new_slab mm/slub.c:2631 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818
__slab_alloc+0x58/0xa0 mm/slub.c:3908
__slab_alloc_node mm/slub.c:3961 [inline]
slab_alloc_node mm/slub.c:4122 [inline]
__do_kmalloc_node mm/slub.c:4263 [inline]
__kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4283
kmemdup_noprof+0x2a/0x60 mm/util.c:133
__addrconf_sysctl_register+0xb1/0x3a0 net/ipv6/addrconf.c:7206
addrconf_sysctl_register+0x167/0x1c0 net/ipv6/addrconf.c:7272
ipv6_add_dev+0xcf6/0x1220 net/ipv6/addrconf.c:456
addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3655
notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
call_netdevice_notifiers net/core/dev.c:2048 [inline]
register_netdevice+0x167f/0x1b00 net/core/dev.c:10524
page last free pid 5787 tgid 5787 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1108 [inline]
free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638
__slab_free+0x31b/0x3d0 mm/slub.c:4490
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4085 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
__kmalloc_cache_noprof+0x132/0x2c0 mm/slub.c:4290
kmalloc_noprof include/linux/slab.h:878 [inline]
netdev_name_node_alloc net/core/dev.c:268 [inline]
netdev_name_node_head_alloc net/core/dev.c:282 [inline]
register_netdevice+0x59c/0x1b00 net/core/dev.c:10412
veth_newlink+0x855/0xce0 drivers/net/veth.c:1861
rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
__rtnl_newlink net/core/rtnetlink.c:3730 [inline]
rtnl_newlink+0x1591/0x20a0 net/core/rtnetlink.c:3743
rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6646
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:744
__sys_sendto+0x39b/0x4f0 net/socket.c:2209
__do_sys_sendto net/socket.c:2221 [inline]
__se_sys_sendto net/socket.c:2217 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2217
Memory state around the buggy address:
ffff88807c76c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807c76c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807c76c300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807c76c380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807c76c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Tested on:
commit: 615b9474 RDMA/hns: Disassociate mmap pages for all uct..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11b98f9f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7cd9e7e4a8a0a15b
dashboard link: https://syzkaller.appspot.com/bug?extid=5fe14f2ff4ccbace9a26
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=16498f9f980000
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
2024-10-08 11:51 ` Leon Romanovsky
@ 2024-10-08 12:24 ` syzbot
0 siblings, 0 replies; 6+ messages in thread
From: syzbot @ 2024-10-08 12:24 UTC (permalink / raw)
To: leon, linux-kernel, linux-rdma, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x6e/0x190 net/ethtool/ioctl.c:442
Read of size 8 at addr ffff8880673be308 by task kworker/0:1/9
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.12.0-rc2-syzkaller-g615b94746a54-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events smc_ib_port_event_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
__ethtool_get_link_ksettings+0x6e/0x190 net/ethtool/ioctl.c:442
ib_get_eth_speed+0x160/0x800 drivers/infiniband/core/verbs.c:1996
rxe_query_port+0x76/0x260 drivers/infiniband/sw/rxe/rxe_verbs.c:55
__ib_query_port drivers/infiniband/core/device.c:2105 [inline]
ib_query_port+0x208/0x870 drivers/infiniband/core/device.c:2147
smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
smc_ib_port_event_work+0x14e/0xa50 net/smc/smc_ib.c:388
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 5967:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:257 [inline]
__do_kmalloc_node mm/slub.c:4264 [inline]
__kmalloc_node_noprof+0x22a/0x440 mm/slub.c:4270
__kvmalloc_node_noprof+0x72/0x190 mm/util.c:658
alloc_netdev_mqs+0x9b/0x1000 net/core/dev.c:11097
rtnl_create_link+0x2f9/0xc20 net/core/rtnetlink.c:3374
rtnl_newlink_create net/core/rtnetlink.c:3500 [inline]
__rtnl_newlink net/core/rtnetlink.c:3730 [inline]
rtnl_newlink+0x1423/0x20a0 net/core/rtnetlink.c:3743
rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6646
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:744
__sys_sendto+0x39b/0x4f0 net/socket.c:2209
__do_sys_sendto net/socket.c:2221 [inline]
__se_sys_sendto net/socket.c:2217 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2217
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 11:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2342 [inline]
slab_free mm/slub.c:4579 [inline]
kfree+0x1a0/0x440 mm/slub.c:4727
device_release+0x99/0x1c0
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x22f/0x480 lib/kobject.c:737
netdev_run_todo+0xe79/0x1000 net/core/dev.c:10816
default_device_exit_batch+0xa24/0xaa0 net/core/dev.c:11949
ops_exit_list net/core/net_namespace.c:178 [inline]
cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:626
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the object at ffff8880673be000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 776 bytes inside of
freed 4096-byte region [ffff8880673be000, ffff8880673bf000)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x673b8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888031406a41
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac4f500 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000001f5000000 ffff888031406a41
head: 00fff00000000040 ffff88801ac4f500 dead000000000122 0000000000000000
head: 0000000000000000 0000000000040004 00000001f5000000 ffff888031406a41
head: 00fff00000000003 ffffea00019cee01 ffffffffffffffff 0000000000000000
head: 0000000700000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5982, tgid 5982 (syz-executor), ts 102124010087, free_ts 96435310364
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1545 [inline]
get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
alloc_slab_page+0x6a/0x120 mm/slub.c:2412
allocate_slab+0x5a/0x2f0 mm/slub.c:2578
new_slab mm/slub.c:2631 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818
__slab_alloc+0x58/0xa0 mm/slub.c:3908
__slab_alloc_node mm/slub.c:3961 [inline]
slab_alloc_node mm/slub.c:4122 [inline]
__kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4290
kmalloc_noprof include/linux/slab.h:878 [inline]
kzalloc_noprof include/linux/slab.h:1014 [inline]
snmp6_alloc_dev net/ipv6/addrconf.c:359 [inline]
ipv6_add_dev+0x570/0x1220 net/ipv6/addrconf.c:409
addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3655
notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
call_netdevice_notifiers net/core/dev.c:2048 [inline]
register_netdevice+0x167f/0x1b00 net/core/dev.c:10524
veth_newlink+0x855/0xce0 drivers/net/veth.c:1861
rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
__rtnl_newlink net/core/rtnetlink.c:3730 [inline]
rtnl_newlink+0x1591/0x20a0 net/core/rtnetlink.c:3743
rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6646
page last free pid 5869 tgid 5869 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1108 [inline]
free_unref_folios+0xf12/0x18d0 mm/page_alloc.c:2686
folios_put_refs+0x76c/0x860 mm/swap.c:1007
free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:332
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
vms_clear_ptes+0x437/0x530 mm/vma.c:1096
vms_complete_munmap_vmas+0x208/0x910 mm/vma.c:1140
do_vmi_align_munmap+0x613/0x730 mm/vma.c:1349
do_vmi_munmap+0x24e/0x2d0 mm/vma.c:1397
__vm_munmap+0x24c/0x480 mm/mmap.c:1600
__do_sys_munmap mm/mmap.c:1617 [inline]
__se_sys_munmap mm/mmap.c:1614 [inline]
__x64_sys_munmap+0x68/0x80 mm/mmap.c:1614
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880673be200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880673be280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880673be300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880673be380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880673be400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Tested on:
commit: 615b9474 RDMA/hns: Disassociate mmap pages for all uct..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
console output: https://syzkaller.appspot.com/x/log.txt?x=131b1707980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7cd9e7e4a8a0a15b
dashboard link: https://syzkaller.appspot.com/bug?extid=5fe14f2ff4ccbace9a26
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=17698f9f980000
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2024-09-27 18:26 ` [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings syzbot
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2024-10-08 11:44 ` Leon Romanovsky
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