WARNING: bad unlock balance in ucma_destroy_id

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: aec3002d Linux 4.19.56
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15aaa023a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=48b721ea0070d1cd
dashboard link: https://syzkaller.appspot.com/bug?extid=bab3ddce7ee3bc34ccd4
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d65255a00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+bab3dd...@syzkaller.appspotmail.com

8021q: adding VLAN 0 to HW filter on device batadv0
audit: type=1400 audit(1561632176.582:38): avc: denied { associate } for
pid=8128 comm="syz-executor.0" name="syz0"
scontext=unconfined_u:object_r:unlabeled_t:s0
tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1
=====================================
WARNING: bad unlock balance detected!
4.19.56 #28 Not tainted
-------------------------------------
syz-executor.0/9212 is trying to release lock (&file->mut) at:
[<ffffffff84ffbf9c>] ucma_destroy_id+0x24c/0x4a0
drivers/infiniband/core/ucma.c:628
but there are no more locks to release!

other info that might help us debug this:
1 lock held by syz-executor.0/9212:
#0: 0000000062f54a15 (&file->mut){+.+.}, at: ucma_destroy_id+0x1e9/0x4a0
drivers/infiniband/core/ucma.c:626

stack backtrace:
CPU: 0 PID: 9212 Comm: syz-executor.0 Not tainted 4.19.56 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
print_unlock_imbalance_bug kernel/locking/lockdep.c:3464 [inline]
print_unlock_imbalance_bug.cold+0x114/0x123 kernel/locking/lockdep.c:3441
__lock_release kernel/locking/lockdep.c:3671 [inline]
lock_release+0x6cd/0xa30 kernel/locking/lockdep.c:3919
__mutex_unlock_slowpath+0x8e/0x6b0 kernel/locking/mutex.c:1197
mutex_unlock+0xd/0x10 kernel/locking/mutex.c:713
ucma_destroy_id+0x24c/0x4a0 drivers/infiniband/core/ucma.c:628
ucma_write+0x2d7/0x3c0 drivers/infiniband/core/ucma.c:1689
__vfs_write+0x114/0x810 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0x14f/0x2d0 fs/read_write.c:599
__do_sys_write fs/read_write.c:611 [inline]
__se_sys_write fs/read_write.c:608 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:608
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459519
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f97ccf3fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519
RDX: 0000000020000118 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f97ccf406d4
R13: 00000000004d0138 R14: 00000000004e02c8 R15: 00000000ffffffff
==================================================================
BUG: KASAN: use-after-free in ucma_destroy_id+0x44c/0x4a0
drivers/infiniband/core/ucma.c:630
Read of size 8 at addr ffff8880a1fd3da8 by task syz-executor.0/9212

CPU: 0 PID: 9212 Comm: syz-executor.0 Not tainted 4.19.56 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report mm/kasan/report.c:412 [inline]
kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
ucma_destroy_id+0x44c/0x4a0 drivers/infiniband/core/ucma.c:630
ucma_write+0x2d7/0x3c0 drivers/infiniband/core/ucma.c:1689
__vfs_write+0x114/0x810 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0x14f/0x2d0 fs/read_write.c:599
__do_sys_write fs/read_write.c:611 [inline]
__se_sys_write fs/read_write.c:608 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:608
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459519
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f97ccf3fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519
RDX: 0000000020000118 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f97ccf406d4
R13: 00000000004d0138 R14: 00000000004e02c8 R15: 00000000ffffffff

Allocated by task 9208:
save_stack+0x45/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc mm/kasan/kasan.c:553 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531
kmem_cache_alloc_trace+0x152/0x760 mm/slab.c:3625
kmalloc include/linux/slab.h:515 [inline]
kzalloc include/linux/slab.h:709 [inline]
ucma_alloc_ctx+0x4e/0x4e0 drivers/infiniband/core/ucma.c:209
ucma_create_id+0x12d/0x640 drivers/infiniband/core/ucma.c:500
ucma_write+0x2d7/0x3c0 drivers/infiniband/core/ucma.c:1689
__vfs_write+0x114/0x810 fs/read_write.c:485
vfs_write+0x20c/0x560 fs/read_write.c:549
ksys_write+0x14f/0x2d0 fs/read_write.c:599
__do_sys_write fs/read_write.c:611 [inline]
__se_sys_write fs/read_write.c:608 [inline]
__x64_sys_write+0x73/0xb0 fs/read_write.c:608
do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 9206:
save_stack+0x45/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
__cache_free mm/slab.c:3503 [inline]
kfree+0xcf/0x220 mm/slab.c:3822
ucma_free_ctx+0x801/0xb90 drivers/infiniband/core/ucma.c:599
ucma_close+0x122/0x320 drivers/infiniband/core/ucma.c:1775
__fput+0x2dd/0x8b0 fs/file_table.c:278
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x145/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880a1fd3d40
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 104 bytes inside of
256-byte region [ffff8880a1fd3d40, ffff8880a1fd3e40)
The buggy address belongs to the page:
page:ffffea000287f4c0 count:1 mapcount:0 mapping:ffff88812c3f07c0 index:0x0
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffffea000287f148 ffffea0002853908 ffff88812c3f07c0
raw: 0000000000000000 ffff8880a1fd30c0 000000010000000c 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
ffff8880a1fd3c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880a1fd3d00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
> ffff8880a1fd3d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880a1fd3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff8880a1fd3e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================


---
This bug 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.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: f4cc0ed9 Linux 4.14.131
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=146edb0ba00000
kernel config: https://syzkaller.appspot.com/x/.config?x=ab1953b2cdac00f5
dashboard link: https://syzkaller.appspot.com/bug?extid=22956fa835c831577177

compiler: gcc (GCC) 9.0.0 20181231 (experimental)

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=127f821ba00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:

Reported-by: syzbot+22956f...@syzkaller.appspotmail.com

IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready

8021q: adding VLAN 0 to HW filter on device batadv0

IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready

=====================================
WARNING: bad unlock balance detected!

4.14.131 #25 Not tainted
-------------------------------------
syz-executor.0/7941 is trying to release lock (&file->mut) at:
[<ffffffff84789c6d>] ucma_destroy_id+0x20d/0x420
drivers/infiniband/core/ucma.c:606

but there are no more locks to release!

other info that might help us debug this:

1 lock held by syz-executor.0/7941:
#0: (&file->mut){+.+.}, at: [<ffffffff84789c0a>]
ucma_destroy_id+0x1aa/0x420 drivers/infiniband/core/ucma.c:604

stack backtrace:
CPU: 1 PID: 7941 Comm: syz-executor.0 Not tainted 4.14.131 #25

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:

__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x19c lib/dump_stack.c:53
print_unlock_imbalance_bug kernel/locking/lockdep.c:3548 [inline]
print_unlock_imbalance_bug.cold+0x114/0x123 kernel/locking/lockdep.c:3525
__lock_release kernel/locking/lockdep.c:3762 [inline]
lock_release+0x616/0x940 kernel/locking/lockdep.c:4010
__mutex_unlock_slowpath+0x71/0x800 kernel/locking/mutex.c:1018
mutex_unlock+0xd/0x10 kernel/locking/mutex.c:614
ucma_destroy_id+0x20d/0x420 drivers/infiniband/core/ucma.c:606
ucma_write+0x231/0x310 drivers/infiniband/core/ucma.c:1672
__vfs_write+0x105/0x6b0 fs/read_write.c:480
vfs_write+0x198/0x500 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xfd/0x230 fs/read_write.c:582
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459519
RSP: 002b:00007f5ffff83c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001

RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519
RDX: 0000000020000118 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5ffff846d4

R13: 00000000004d0138 R14: 00000000004e02c8 R15: 00000000ffffffff
==================================================================

BUG: KASAN: use-after-free in ucma_destroy_id+0x3e2/0x420
drivers/infiniband/core/ucma.c:608
Read of size 8 at addr ffff888089d48128 by task syz-executor.0/7941

CPU: 1 PID: 7941 Comm: syz-executor.0 Not tainted 4.14.131 #25

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:

__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x19c lib/dump_stack.c:53
print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
ucma_destroy_id+0x3e2/0x420 drivers/infiniband/core/ucma.c:608
ucma_write+0x231/0x310 drivers/infiniband/core/ucma.c:1672
__vfs_write+0x105/0x6b0 fs/read_write.c:480
vfs_write+0x198/0x500 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xfd/0x230 fs/read_write.c:582
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459519
RSP: 002b:00007f5ffff83c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001

RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519
RDX: 0000000020000118 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5ffff846d4

R13: 00000000004d0138 R14: 00000000004e02c8 R15: 00000000ffffffff

Allocated by task 7937:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x45/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
kmem_cache_alloc_trace+0x152/0x790 mm/slab.c:3618
kmalloc include/linux/slab.h:488 [inline]
kzalloc include/linux/slab.h:661 [inline]
ucma_alloc_ctx+0x85/0x520 drivers/infiniband/core/ucma.c:192
ucma_create_id+0xed/0x5b0 drivers/infiniband/core/ucma.c:478
ucma_write+0x231/0x310 drivers/infiniband/core/ucma.c:1672
__vfs_write+0x105/0x6b0 fs/read_write.c:480
vfs_write+0x198/0x500 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xfd/0x230 fs/read_write.c:582
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 7936:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x45/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xcc/0x270 mm/slab.c:3815
ucma_free_ctx+0x73c/0xa30 drivers/infiniband/core/ucma.c:577
ucma_close+0x11d/0x310 drivers/infiniband/core/ucma.c:1758
__fput+0x275/0x7a0 fs/file_table.c:210
____fput+0x16/0x20 fs/file_table.c:244
task_work_run+0x114/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff888089d480c0

which belongs to the cache kmalloc-256 of size 256
The buggy address is located 104 bytes inside of

256-byte region [ffff888089d480c0, ffff888089d481c0)

The buggy address belongs to the page:

page:ffffea0002275200 count:1 mapcount:0 mapping:ffff888089d480c0 index:0x0
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff888089d480c0 0000000000000000 000000010000000c
raw: ffffea000228d2a0 ffffea0002a11820 ffff8880aa8007c0 0000000000000000

page dumped because: kasan: bad access detected

Memory state around the buggy address:

ffff888089d48000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888089d48080: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
> ffff888089d48100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888089d48180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff888089d48200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 65640c873dcf Linux 4.14.292
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17db2727080000
kernel config: https://syzkaller.appspot.com/x/.config?x=e88a9c332b8ce547
dashboard link: https://syzkaller.appspot.com/bug?extid=22956fa835c831577177
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=134c088f080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1495931f080000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+22956f...@syzkaller.appspotmail.com

=====================================
WARNING: bad unlock balance detected!

4.14.292-syzkaller #0 Not tainted
-------------------------------------
syz-executor956/8126 is trying to release lock (&file->mut) at:
[<ffffffff855217fb>] ucma_destroy_id+0x1eb/0x420 drivers/infiniband/core/ucma.c:606

but there are no more locks to release!

other info that might help us debug this:

1 lock held by syz-executor956/8126:
#0: (&file->mut){+.+.}, at: [<ffffffff8552179c>] ucma_destroy_id+0x18c/0x420 drivers/infiniband/core/ucma.c:604

stack backtrace:
CPU: 1 PID: 8126 Comm: syz-executor956 Not tainted 4.14.292-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022

Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]

dump_stack+0x1b2/0x281 lib/dump_stack.c:58
print_unlock_imbalance_bug include/trace/events/lock.h:58 [inline]
__lock_release kernel/locking/lockdep.c:3769 [inline]
lock_release.cold+0x70/0xbf kernel/locking/lockdep.c:4017
__mutex_unlock_slowpath+0x75/0x770 kernel/locking/mutex.c:1018
ucma_destroy_id+0x1eb/0x420 drivers/infiniband/core/ucma.c:606
ucma_write+0x206/0x2c0 drivers/infiniband/core/ucma.c:1672
__vfs_write+0xe4/0x630 fs/read_write.c:480
vfs_write+0x17f/0x4d0 fs/read_write.c:544
SYSC_write fs/read_write.c:590 [inline]
SyS_write+0xf2/0x210 fs/read_write.c:582
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f45d87c9a69
RSP: 002b:00007f45d875a308 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f45d8851418 RCX: 00007f45d87c9a69
RDX: 0000000000000018 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007f45d8851410 R08: 00007f45d875a700 R09: 0000000000000000
R10: 00007f45d875a700 R11: 0000000000000246 R12: 00007f45d885141c
R13: 00007f45d881f074 R14: 006d635f616d6472 R15: 0000000000022000

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=109d6e25080000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=bab3ddce7ee3bc34ccd4

compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1495af9d080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=174c088f080000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bab3dd...@syzkaller.appspotmail.com

wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready

=====================================
WARNING: bad unlock balance detected!

4.19.211-syzkaller #0 Not tainted
-------------------------------------
syz-executor174/8344 is trying to release lock (&file->mut) at:
[<ffffffff85f61bf1>] ucma_destroy_id+0x221/0x4a0 drivers/infiniband/core/ucma.c:631

but there are no more locks to release!

other info that might help us debug this:

1 lock held by syz-executor174/8344:
#0: 0000000063535aa8 (&file->mut){+.+.}, at: ucma_destroy_id+0x1c2/0x4a0 drivers/infiniband/core/ucma.c:629

stack backtrace:
CPU: 1 PID: 8344 Comm: syz-executor174 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022

Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]

dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_unlock_imbalance_bug kernel/locking/lockdep.c:149 [inline]
__lock_release kernel/locking/lockdep.c:3679 [inline]
lock_release.cold+0xe/0x4a kernel/locking/lockdep.c:3927
__mutex_unlock_slowpath+0x89/0x610 kernel/locking/mutex.c:1203
ucma_destroy_id+0x221/0x4a0 drivers/infiniband/core/ucma.c:631
ucma_write+0x288/0x350 drivers/infiniband/core/ucma.c:1738
__vfs_write+0xf7/0x770 fs/read_write.c:485
vfs_write+0x1f3/0x540 fs/read_write.c:549
ksys_write+0x12b/0x2a0 fs/read_write.c:599
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f2dc0aec3d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2dc026f208 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2dc0b6f4b8 RCX: 00007f2dc0aec3d9

RDX: 0000000000000018 RSI: 0000000020000180 RDI: 0000000000000003

RBP: 00007f2dc0b6f4b0 R08: 00007f2dc026f700 R09: 0000000000000000
R10: 00007f2dc026f700 R11: 0000000000000246 R12: 00007f2dc0b6f4bc
R13: 00007ffc5999ab5f R14: 00007f2dc026f300 R15: 0000000000022000
==================================================================
BUG: KASAN: use-after-free in atomic64_read include/asm-generic/atomic-instrumented.h:27 [inline]
BUG: KASAN: use-after-free in atomic_long_read include/asm-generic/atomic-long.h:47 [inline]
BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0x96/0x610 kernel/locking/mutex.c:1212
Read of size 8 at addr ffff8880b49faac0 by task syz-executor174/8344

CPU: 1 PID: 8344 Comm: syz-executor174 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022

Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]

dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
kasan_report+0x8f/0xa0 mm/kasan/report.c:412
atomic64_read include/asm-generic/atomic-instrumented.h:27 [inline]
atomic_long_read include/asm-generic/atomic-long.h:47 [inline]
__mutex_unlock_slowpath+0x96/0x610 kernel/locking/mutex.c:1212
ucma_destroy_id+0x221/0x4a0 drivers/infiniband/core/ucma.c:631
ucma_write+0x288/0x350 drivers/infiniband/core/ucma.c:1738
__vfs_write+0xf7/0x770 fs/read_write.c:485
vfs_write+0x1f3/0x540 fs/read_write.c:549
ksys_write+0x12b/0x2a0 fs/read_write.c:599
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f2dc0aec3d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2dc026f208 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2dc0b6f4b8 RCX: 00007f2dc0aec3d9

RDX: 0000000000000018 RSI: 0000000020000180 RDI: 0000000000000003

RBP: 00007f2dc0b6f4b0 R08: 00007f2dc026f700 R09: 0000000000000000
R10: 00007f2dc026f700 R11: 0000000000000246 R12: 00007f2dc0b6f4bc
R13: 00007ffc5999ab5f R14: 00007f2dc026f300 R15: 0000000000022000

Allocated by task 8341:
kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
kmalloc include/linux/slab.h:515 [inline]
ucma_open+0x4a/0x280 drivers/infiniband/core/ucma.c:1770
misc_open+0x372/0x4a0 drivers/char/misc.c:141
chrdev_open+0x266/0x770 fs/char_dev.c:423
do_dentry_open+0x4aa/0x1160 fs/open.c:796
do_last fs/namei.c:3421 [inline]
path_openat+0x793/0x2df0 fs/namei.c:3537
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
do_sys_open+0x3b3/0x520 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8082:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
ucma_close+0x2cf/0x360 drivers/infiniband/core/ucma.c:1829
__fput+0x2ce/0x890 fs/file_table.c:278
task_work_run+0x148/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167

prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]

do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880b49faac0

which belongs to the cache kmalloc-256 of size 256

The buggy address is located 0 bytes inside of
256-byte region [ffff8880b49faac0, ffff8880b49fabc0)

The buggy address belongs to the page:

page:ffffea0002d27e80 count:1 mapcount:0 mapping:ffff88813bff07c0 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002bfbd48 ffffea0002d37888 ffff88813bff07c0
raw: 0000000000000000 ffff8880b49fa0c0 000000010000000c 0000000000000000

page dumped because: kasan: bad access detected

Memory state around the buggy address:

ffff8880b49fa980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8880b49faa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc
>ffff8880b49faa80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
^
ffff8880b49fab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880b49fab80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================