[moderation] [gfs2?] KASAN: slab-use-after-free Read in gfs2_glock_free
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syzbot
Apr 30, 2024, 5:35:28 PMApr 30
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: e6ebf0117218 Merge tag 'mm-hotfixes-stable-2024-04-26-13-3..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15cbdfc8980000
kernel config: https://syzkaller.appspot.com/x/.config?x=bd5ccbebf2edbe54
dashboard link: https://syzkaller.appspot.com/bug?extid=6169a526172f97942e95
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
CC: [agru...@redhat.com gf...@lists.linux.dev linux-...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-e6ebf011.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1250fa3e2001/vmlinux-e6ebf011.xz
kernel image: https://storage.googleapis.com/syzbot-assets/94872fce1d52/bzImage-e6ebf011.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6169a5...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in register_lock_class+0xdab/0x1230 kernel/locking/lockdep.c:1328
Read of size 8 at addr ffff88801df6c530 by task kworker/2:1H/1198
CPU: 2 PID: 1198 Comm: kworker/2:1H Not tainted 6.9.0-rc5-syzkaller-00238-ge6ebf0117218 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: glock_workqueue glock_work_func
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
register_lock_class+0xdab/0x1230 kernel/locking/lockdep.c:1328
__lock_acquire+0x111/0x3b30 kernel/locking/lockdep.c:5014
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:105 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:127
gfs2_glock_free+0xe70/0x12d0 fs/gfs2/glock.c:179
glock_work_func+0x2bc/0x390 fs/gfs2/glock.c:1109
process_one_work+0x902/0x1a30 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 6988:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
kmalloc include/linux/slab.h:628 [inline]
kzalloc include/linux/slab.h:749 [inline]
init_sbd fs/gfs2/ops_fstype.c:77 [inline]
gfs2_fill_super+0x141/0x2ac0 fs/gfs2/ops_fstype.c:1160
get_tree_bdev+0x36f/0x610 fs/super.c:1614
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1341
vfs_get_tree+0x8f/0x380 fs/super.c:1779
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x6e1/0x1f10 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 6751:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:240 [inline]
__kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kfree+0x129/0x390 mm/slub.c:4390
generic_shutdown_super+0x159/0x3d0 fs/super.c:641
kill_block_super+0x3b/0x90 fs/super.c:1675
gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804
deactivate_locked_super+0xbe/0x1a0 fs/super.c:472
deactivate_super+0xde/0x100 fs/super.c:505
cleanup_mnt+0x222/0x450 fs/namespace.c:1267
task_work_run+0x14e/0x250 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x278/0x2a0 kernel/entry/common.c:218
__do_fast_syscall_32+0x82/0x120 arch/x86/entry/common.c:389
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff88801df6c000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 1328 bytes inside of
freed 8192-byte region [ffff88801df6c000, ffff88801df6e000)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1df68
head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000840 ffff888014c43180 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
head: 00fff80000000840 ffff888014c43180 dead000000000100 dead000000000122
head: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
head: 00fff80000000003 ffffea000077da01 ffffea000077da48 00000000ffffffff
head: 0000000800000000 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5451, tgid -1145328208 (syz-executor.3), ts 5451, free_ts 204995315024
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
__alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page mm/slub.c:2175 [inline]
allocate_slab mm/slub.c:2338 [inline]
new_slab+0xcc/0x3a0 mm/slub.c:2391
___slab_alloc+0x670/0x16d0 mm/slub.c:3525
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
__do_kmalloc_node mm/slub.c:3965 [inline]
__kmalloc+0x3b4/0x440 mm/slub.c:3979
kmalloc_array include/linux/slab.h:665 [inline]
batadv_hash_new+0xb2/0x2e0 net/batman-adv/hash.c:56
batadv_bla_init+0x370/0x750 net/batman-adv/bridge_loop_avoidance.c:1563
batadv_mesh_init+0x523/0x9a0 net/batman-adv/main.c:212
batadv_softif_init_late+0xbd6/0xf30 net/batman-adv/soft-interface.c:812
register_netdevice+0x59f/0x1c40 net/core/dev.c:10210
batadv_softif_newlink+0x70/0x90 net/batman-adv/soft-interface.c:1088
rtnl_newlink_create net/core/rtnetlink.c:3494 [inline]
__rtnl_newlink+0x119c/0x1960 net/core/rtnetlink.c:3714
rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3727
rtnetlink_rcv_msg+0x3c7/0xe60 net/core/rtnetlink.c:6595
page last free pid 5444 tgid 5444 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
__put_partials+0x14c/0x170 mm/slub.c:2906
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmalloc_trace+0x147/0x330 mm/slub.c:3992
kmalloc include/linux/slab.h:628 [inline]
kzalloc include/linux/slab.h:749 [inline]
kobject_uevent_env+0x265/0x15f0 lib/kobject_uevent.c:525
__kobject_del+0x168/0x1f0 lib/kobject.c:601
kobject_cleanup lib/kobject.c:680 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x31c/0x5b0 lib/kobject.c:737
net_rx_queue_update_kobjects+0x478/0x5f0 net/core/net-sysfs.c:1174
netif_set_real_num_rx_queues+0x169/0x210 net/core/dev.c:2941
veth_init_queues+0x151/0x190 drivers/net/veth.c:1759
veth_newlink+0x546/0xa10 drivers/net/veth.c:1871
rtnl_newlink_create net/core/rtnetlink.c:3494 [inline]
__rtnl_newlink+0x119c/0x1960 net/core/rtnetlink.c:3714
rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3727
Memory state around the buggy address:
ffff88801df6c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801df6c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801df6c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801df6c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801df6c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
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If the report is a duplicate of another one, reply with:
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syzbot found the following issue on:
HEAD commit: e6ebf0117218 Merge tag 'mm-hotfixes-stable-2024-04-26-13-3..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15cbdfc8980000
kernel config: https://syzkaller.appspot.com/x/.config?x=bd5ccbebf2edbe54
dashboard link: https://syzkaller.appspot.com/bug?extid=6169a526172f97942e95
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
CC: [agru...@redhat.com gf...@lists.linux.dev linux-...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-e6ebf011.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1250fa3e2001/vmlinux-e6ebf011.xz
kernel image: https://storage.googleapis.com/syzbot-assets/94872fce1d52/bzImage-e6ebf011.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6169a5...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in register_lock_class+0xdab/0x1230 kernel/locking/lockdep.c:1328
Read of size 8 at addr ffff88801df6c530 by task kworker/2:1H/1198
CPU: 2 PID: 1198 Comm: kworker/2:1H Not tainted 6.9.0-rc5-syzkaller-00238-ge6ebf0117218 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: glock_workqueue glock_work_func
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
register_lock_class+0xdab/0x1230 kernel/locking/lockdep.c:1328
__lock_acquire+0x111/0x3b30 kernel/locking/lockdep.c:5014
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:105 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:127
gfs2_glock_free+0xe70/0x12d0 fs/gfs2/glock.c:179
glock_work_func+0x2bc/0x390 fs/gfs2/glock.c:1109
process_one_work+0x902/0x1a30 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Allocated by task 6988:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
kmalloc include/linux/slab.h:628 [inline]
kzalloc include/linux/slab.h:749 [inline]
init_sbd fs/gfs2/ops_fstype.c:77 [inline]
gfs2_fill_super+0x141/0x2ac0 fs/gfs2/ops_fstype.c:1160
get_tree_bdev+0x36f/0x610 fs/super.c:1614
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1341
vfs_get_tree+0x8f/0x380 fs/super.c:1779
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x6e1/0x1f10 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 6751:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:240 [inline]
__kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kfree+0x129/0x390 mm/slub.c:4390
generic_shutdown_super+0x159/0x3d0 fs/super.c:641
kill_block_super+0x3b/0x90 fs/super.c:1675
gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804
deactivate_locked_super+0xbe/0x1a0 fs/super.c:472
deactivate_super+0xde/0x100 fs/super.c:505
cleanup_mnt+0x222/0x450 fs/namespace.c:1267
task_work_run+0x14e/0x250 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x278/0x2a0 kernel/entry/common.c:218
__do_fast_syscall_32+0x82/0x120 arch/x86/entry/common.c:389
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff88801df6c000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 1328 bytes inside of
freed 8192-byte region [ffff88801df6c000, ffff88801df6e000)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1df68
head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000840 ffff888014c43180 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
head: 00fff80000000840 ffff888014c43180 dead000000000100 dead000000000122
head: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
head: 00fff80000000003 ffffea000077da01 ffffea000077da48 00000000ffffffff
head: 0000000800000000 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5451, tgid -1145328208 (syz-executor.3), ts 5451, free_ts 204995315024
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
__alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page mm/slub.c:2175 [inline]
allocate_slab mm/slub.c:2338 [inline]
new_slab+0xcc/0x3a0 mm/slub.c:2391
___slab_alloc+0x670/0x16d0 mm/slub.c:3525
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
__do_kmalloc_node mm/slub.c:3965 [inline]
__kmalloc+0x3b4/0x440 mm/slub.c:3979
kmalloc_array include/linux/slab.h:665 [inline]
batadv_hash_new+0xb2/0x2e0 net/batman-adv/hash.c:56
batadv_bla_init+0x370/0x750 net/batman-adv/bridge_loop_avoidance.c:1563
batadv_mesh_init+0x523/0x9a0 net/batman-adv/main.c:212
batadv_softif_init_late+0xbd6/0xf30 net/batman-adv/soft-interface.c:812
register_netdevice+0x59f/0x1c40 net/core/dev.c:10210
batadv_softif_newlink+0x70/0x90 net/batman-adv/soft-interface.c:1088
rtnl_newlink_create net/core/rtnetlink.c:3494 [inline]
__rtnl_newlink+0x119c/0x1960 net/core/rtnetlink.c:3714
rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3727
rtnetlink_rcv_msg+0x3c7/0xe60 net/core/rtnetlink.c:6595
page last free pid 5444 tgid 5444 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
__put_partials+0x14c/0x170 mm/slub.c:2906
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmalloc_trace+0x147/0x330 mm/slub.c:3992
kmalloc include/linux/slab.h:628 [inline]
kzalloc include/linux/slab.h:749 [inline]
kobject_uevent_env+0x265/0x15f0 lib/kobject_uevent.c:525
__kobject_del+0x168/0x1f0 lib/kobject.c:601
kobject_cleanup lib/kobject.c:680 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x31c/0x5b0 lib/kobject.c:737
net_rx_queue_update_kobjects+0x478/0x5f0 net/core/net-sysfs.c:1174
netif_set_real_num_rx_queues+0x169/0x210 net/core/dev.c:2941
veth_init_queues+0x151/0x190 drivers/net/veth.c:1759
veth_newlink+0x546/0xa10 drivers/net/veth.c:1871
rtnl_newlink_create net/core/rtnetlink.c:3494 [inline]
__rtnl_newlink+0x119c/0x1960 net/core/rtnetlink.c:3714
rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3727
Memory state around the buggy address:
ffff88801df6c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801df6c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801df6c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801df6c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801df6c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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