syzbot

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VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 4095 at fs/buffer.c:1148 __brelse fs/buffer.c:1148 [inline]
WARNING: CPU: 0 PID: 4095 at fs/buffer.c:1148 brelse include/linux/buffer_head.h:325 [inline]
WARNING: CPU: 0 PID: 4095 at fs/buffer.c:1148 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
WARNING: CPU: 0 PID: 4095 at fs/buffer.c:1148 invalidate_bh_lru+0x130/0x228 fs/buffer.c:1407
Modules linked in:
CPU: 0 PID: 4095 Comm: syz-executor.0 Not tainted 5.15.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
pstate: 604000c5 (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+0x130/0x228 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+0x130/0x228 fs/buffer.c:1407
sp : ffff80001c6b76b0
x29: ffff80001c6b76b0 x28: ffff0001b4811d48 x27: dfff800000000000
x26: ffff800008a65c34 x25: 0000000000000001 x24: ffff0001b480c6d8
x23: 0000000000000078 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000dc9d6970 x19: ffff800011b4c0e0 x18: 0000000000000003
x17: ff80800008333ebc x16: ffff800011940934 x15: ffff800008333ebc
x14: 00000000ffffffff x13: ffffffffffffffff x12: 0000000000000000
x11: ff8080000832b964 x10: 0000000000000000 x9 : f4c57b538fdc0f00
x8 : f4c57b538fdc0f00 x7 : fffffffffffef9d0 x6 : fffffffffffef990
x5 : ffff80001c6b6e18 x4 : ffff800014990230 x3 : ffff80000854a334
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+0x130/0x228 fs/buffer.c:1407
 smp_call_function_many_cond+0x920/0x1088 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+0x164/0x324 block/bdev.c:659
 blkdev_put_whole block/bdev.c:690 [inline]
 blkdev_put+0x498/0x6b0 block/bdev.c:954
 kill_block_super+0x98/0xdc fs/super.c:1408
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0x108/0x128 fs/super.c:366
 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
 task_work_run+0x130/0x1e4 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
 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+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 6394026
hardirqs last  enabled at (6394025): [<ffff80000881fccc>] free_unref_page_list+0x71c/0x7a8 mm/page_alloc.c:3478
hardirqs last disabled at (6394026): [<ffff80000840b880>] smp_call_function_many_cond+0x914/0x1088 kernel/smp.c:959
softirqs last  enabled at (6393760): [<ffff800008030068>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (6393758): [<ffff800008030034>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace 70ffa8491a8bb91a ]---