------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 4933 at fs/buffer.c:1148 __brelse fs/buffer.c:1148 [inline]
WARNING: CPU: 1 PID: 4933 at fs/buffer.c:1148 brelse include/linux/buffer_head.h:325 [inline]
WARNING: CPU: 1 PID: 4933 at fs/buffer.c:1148 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
WARNING: CPU: 1 PID: 4933 at fs/buffer.c:1148 invalidate_bh_lru+0x128/0x234 fs/buffer.c:1407
Modules linked in:
CPU: 1 PID: 4933 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 624000c5 (nZCv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __brelse fs/buffer.c:1148 [inline]
pc : brelse include/linux/buffer_head.h:325 [inline]
pc : __invalidate_bh_lrus fs/buffer.c:1394 [inline]
pc : invalidate_bh_lru+0x128/0x234 fs/buffer.c:1407
lr : __brelse fs/buffer.c:1148 [inline]
lr : brelse include/linux/buffer_head.h:325 [inline]
lr : __invalidate_bh_lrus fs/buffer.c:1394 [inline]
lr : invalidate_bh_lru+0x128/0x234 fs/buffer.c:1407
sp : ffff80001f6d77c0
x29: ffff80001f6d77c0 x28: ffff80001417d000 x27: 1fffe0003421c65b
x26: 0000000000000001 x25: ffff0001a10e32d8 x24: 0000000000000000
x23: dfff800000000000 x22: 0000000000000000 x21: ffff0000e29077a0
x20: ffff0001a10e32d8 x19: ffff8000113d9aa0 x18: 0000000000000003
x17: 0000000000000000 x16: ffff8000111c8944 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000002 x10: 0000000000000000 x9 : 8c364d5cc0ffe200
x8 : 8c364d5cc0ffe200 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f6d70b8 x4 : ffff80001425f420 x3 : ffff80000850471c
x2 : 0000000000000001 x1 : 0000000100000002 x0 : 0000000000000027
Call trace:
 __brelse fs/buffer.c:1148 [inline]
 brelse include/linux/buffer_head.h:325 [inline]
 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
 invalidate_bh_lru+0x128/0x234 fs/buffer.c:1407
 smp_call_function_many_cond+0xa50/0xeb0 kernel/smp.c:960
 on_each_cpu_cond_mask+0x5c/0xc4 kernel/smp.c:1135
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x34/0x40 fs/buffer.c:1426
 kill_bdev block/bdev.c:76 [inline]
 blkdev_flush_mapping+0x168/0x31c block/bdev.c:659
 blkdev_put_whole block/bdev.c:690 [inline]
 blkdev_put+0x490/0x6ac block/bdev.c:957
 blkdev_close+0x74/0xb0 block/fops.c:478
 __fput+0x1c0/0x7f8 fs/file_table.c:311
 ____fput+0x20/0x30 fs/file_table.c:339
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 9750
hardirqs last  enabled at (9749): [<ffff80000883e06c>] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231
hardirqs last disabled at (9750): [<ffff8000083cd7b0>] smp_call_function_many_cond+0xa44/0xeb0 kernel/smp.c:959
softirqs last  enabled at (9534): [<ffff800008031f6c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (9532): [<ffff800008031f38>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace 6903da8befc062c8 ]---
------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 4933 at fs/buffer.c:1148 __brelse fs/buffer.c:1148 [inline]
WARNING: CPU: 0 PID: 4933 at fs/buffer.c:1148 brelse include/linux/buffer_head.h:325 [inline]
WARNING: CPU: 0 PID: 4933 at fs/buffer.c:1148 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
WARNING: CPU: 0 PID: 4933 at fs/buffer.c:1148 invalidate_bh_lru+0x128/0x234 fs/buffer.c:1407
Modules linked in:
CPU: 0 PID: 4933 Comm: udevd Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 624000c5 (nZCv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __brelse fs/buffer.c:1148 [inline]
pc : brelse include/linux/buffer_head.h:325 [inline]
pc : __invalidate_bh_lrus fs/buffer.c:1394 [inline]
pc : invalidate_bh_lru+0x128/0x234 fs/buffer.c:1407
lr : __brelse fs/buffer.c:1148 [inline]
lr : brelse include/linux/buffer_head.h:325 [inline]
lr : __invalidate_bh_lrus fs/buffer.c:1394 [inline]
lr : invalidate_bh_lru+0x128/0x234 fs/buffer.c:1407
sp : ffff80001f6d77c0
x29: ffff80001f6d77c0 x28: ffff80001417d000 x27: 1fffe0003421845c
x26: 0000000000000001 x25: ffff0001a10c22d8 x24: 0000000000000001
x23: dfff800000000000 x22: 0000000000000000 x21: ffff0000e28a94e8
x20: ffff0001a10c22e0 x19: ffff8000113d9aa0 x18: 0000000000000003
x17: 0000000000000000 x16: ffff8000111c8944 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000002 x10: 0000000000000000 x9 : 8c364d5cc0ffe200
x8 : 8c364d5cc0ffe200 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f6d70b8 x4 : ffff80001425f420 x3 : ffff80000850471c
x2 : 0000000000000001 x1 : 0000000100000002 x0 : 0000000000000027
Call trace:
 __brelse fs/buffer.c:1148 [inline]
 brelse include/linux/buffer_head.h:325 [inline]
 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
 invalidate_bh_lru+0x128/0x234 fs/buffer.c:1407
 smp_call_function_many_cond+0xa50/0xeb0 kernel/smp.c:960
 on_each_cpu_cond_mask+0x5c/0xc4 kernel/smp.c:1135
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x34/0x40 fs/buffer.c:1426
 kill_bdev block/bdev.c:76 [inline]
 blkdev_flush_mapping+0x168/0x31c block/bdev.c:659
 blkdev_put_whole block/bdev.c:690 [inline]
 blkdev_put+0x490/0x6ac block/bdev.c:957
 blkdev_close+0x74/0xb0 block/fops.c:478
 __fput+0x1c0/0x7f8 fs/file_table.c:311
 ____fput+0x20/0x30 fs/file_table.c:339
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 19386
hardirqs last  enabled at (19385): [<ffff80000883e06c>] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:231
hardirqs last disabled at (19386): [<ffff8000083cd7b0>] smp_call_function_many_cond+0xa44/0xeb0 kernel/smp.c:959
softirqs last  enabled at (19374): [<ffff800008031f6c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (19372): [<ffff800008031f38>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace 6903da8befc062ca ]---