syzbot

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WARNING: fs/dcache.c:829 at fast_dput+0x334/0x430 fs/dcache.c:829, CPU#0: syz-executor/5820
Modules linked in:
CPU: 0 UID: 0 PID: 5820 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:fast_dput+0x334/0x430 fs/dcache.c:829
Code: e3 81 ff 48 b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 84 c0 0f 85 e2 00 00 00 41 80 0e 40 e9 fd fe ff ff e8 4d e3 81 ff 90 <0f> 0b 90 e9 ef fe ff ff 44 89 e6 81 e6 00 00 04 00 31 ff e8 74 e7
RSP: 0018:ffffc9000405f8e8 EFLAGS: 00010293
RAX: ffffffff82400fe3 RBX: ffff88805b6b5838 RCX: ffff8880796f8000
RDX: 0000000000000000 RSI: 00000000ffffff80 RDI: 0000000000000001
RBP: 00000000ffffff80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200080bf0c R12: dffffc0000000000
R13: 1ffff1100b6d6b0f R14: ffff88805b6b5780 R15: ffff88805b6b5878
FS:  0000555567b48500(0000) GS:ffff888125a03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555567b635c8 CR3: 000000006689c000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dput+0xe8/0x1a0 fs/dcache.c:924
 ovl_stack_put+0x6a/0xa0 fs/overlayfs/util.c:133
 ovl_destroy_inode+0xaa/0x150 fs/overlayfs/super.c:218
 destroy_inode fs/inode.c:396 [inline]
 evict+0x8aa/0xae0 fs/inode.c:861
 __dentry_kill+0x209/0x660 fs/dcache.c:670
 shrink_kill+0xa9/0x2c0 fs/dcache.c:1137
 shrink_dentry_list+0x2e0/0x5e0 fs/dcache.c:1164
 shrink_dcache_tree+0xca/0x2e0 fs/dcache.c:-1
 do_one_tree+0x28/0xe0 fs/dcache.c:1644
 shrink_dcache_for_umount+0xa0/0x170 fs/dcache.c:1661
 generic_shutdown_super+0x67/0x2c0 fs/super.c:621
 kill_anon_super+0x3b/0x70 fs/super.c:1289
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1328
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0xff/0x4f0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2ce8390a77
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd7b7b0d68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f2ce8413d7d RCX: 00007f2ce8390a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd7b7b0e20
RBP: 00007ffd7b7b0e20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd7b7b1eb0
R13: 00007f2ce8413d7d R14: 00000000000277ab R15: 00007ffd7b7b1ef0
 </TASK>