------------[ cut here ]------------
WARNING: CPU: 0 PID: 4125 at fs/inode.c:340 drop_nlink+0xce/0x110 fs/inode.c:340
Modules linked in:
CPU: 0 UID: 0 PID: 4125 Comm: syz.3.1584 Not tainted syzkaller #0 8557b6f4d128b4a4d63f70857eed3e16fdb6808e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:drop_nlink+0xce/0x110 fs/inode.c:340
Code: 04 00 00 be 08 00 00 00 e8 5f 46 ee ff f0 48 ff 83 b8 04 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 88 dd a0 03 cc e8 42 0f 98 ff <0f> 0b eb 81 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 59 ff ff ff 4c
RSP: 0018:ffffc9000d3c70d0 EFLAGS: 00010287
RAX: ffffffff81edddde RBX: ffff88813044c000 RCX: 0000000000080000
RDX: ffffc900031d8000 RSI: 0000000000000ee6 RDI: 0000000000000ee7
RBP: ffffc9000d3c70f8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001a78e10 R12: dffffc0000000000
R13: 1ffff11026089809 R14: ffff88813044c048 R15: 0000000000000000
FS:  00007fe6c8c866c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 0000000131474000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 simple_rmdir+0x153/0x260 fs/libfs.c:781
 vfs_rmdir+0x3e0/0x560 fs/namei.c:4340
 incfs_rmdir fs/incfs/vfs.c:649 [inline]
 dir_rmdir+0x236/0x320 fs/incfs/vfs.c:1352
 vfs_rmdir+0x3e0/0x560 fs/namei.c:4340
 incfs_rmdir fs/incfs/vfs.c:649 [inline]
 dir_rmdir+0x236/0x320 fs/incfs/vfs.c:1352
 vfs_rmdir+0x3e0/0x560 fs/namei.c:4340
 ovl_do_rmdir fs/overlayfs/overlayfs.h:209 [inline]
 ovl_workdir_cleanup+0x192/0x780 fs/overlayfs/readdir.c:1156
 ovl_workdir_create+0x2af/0x750 fs/overlayfs/super.c:303
 ovl_make_workdir fs/overlayfs/super.c:650 [inline]
 ovl_get_workdir+0x328/0x1650 fs/overlayfs/super.c:808
 ovl_fill_super+0x133f/0x36f0 fs/overlayfs/super.c:1381
 vfs_get_super fs/super.c:1283 [inline]
 get_tree_nodev+0xce/0x170 fs/super.c:1302
 ovl_get_tree+0x20/0x30 fs/overlayfs/params.c:610
 vfs_get_tree+0xa1/0x290 fs/super.c:1817
 do_new_mount+0x251/0xb40 fs/namespace.c:3531
 path_mount+0x688/0x1050 fs/namespace.c:3858
 do_mount fs/namespace.c:3871 [inline]
 __do_sys_mount fs/namespace.c:4081 [inline]
 __se_sys_mount+0x2bd/0x480 fs/namespace.c:4058
 __x64_sys_mount+0xc3/0xf0 fs/namespace.c:4058
 x64_sys_call+0x2021/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fe6c7d8eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe6c8c86038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe6c7fd5fa0 RCX: 00007fe6c7d8eba9
RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000
RBP: 00007fe6c7e11e19 R08: 0000200000000200 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe6c7fd6038 R14: 00007fe6c7fd5fa0 R15: 00007fff691b40c8
 </TASK>
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4125 at fs/dcache.c:774 fast_dput fs/dcache.c:774 [inline]
WARNING: CPU: 0 PID: 4125 at fs/dcache.c:774 dput+0x3cd/0x510 fs/dcache.c:851
Modules linked in:
CPU: 0 UID: 0 PID: 4125 Comm: syz.3.1584 Tainted: G        W          syzkaller #0 8557b6f4d128b4a4d63f70857eed3e16fdb6808e
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:fast_dput fs/dcache.c:774 [inline]
RIP: 0010:dput+0x3cd/0x510 fs/dcache.c:851
Code: 0c 99 ff 48 b8 00 00 00 00 00 fc ff df 48 8b 4d d0 0f b6 04 01 84 c0 0f 85 21 01 00 00 80 0b 40 e9 a8 fe ff ff e8 a3 0c 99 ff <0f> 0b e9 9c fe ff ff e8 97 0c 99 ff 48 89 df e8 2f 01 00 00 84 c0
RSP: 0018:ffffc9000d3c73b0 EFLAGS: 00010246
RAX: ffffffff81ece07d RBX: ffff8881306bc440 RCX: 0000000000080000
RDX: ffffc900031d8000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000d3c73e0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001a78e68 R12: 00000000ffffff80
R13: ffff8881306bc4c4 R14: ffff8881306bc4c0 R15: 1ffff110260d7898
FS:  00007fe6c8c866c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 0000000131474000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 path_put+0x3d/0x70 fs/namei.c:568
 dentry_release+0x53/0xb0 fs/incfs/vfs.c:1587
 __dentry_kill+0x22e/0x5f0 fs/dcache.c:620
 dput+0x3f2/0x510 fs/dcache.c:857
 path_put+0x3d/0x70 fs/namei.c:568
 dentry_release+0x53/0xb0 fs/incfs/vfs.c:1587
 __dentry_kill+0x22e/0x5f0 fs/dcache.c:620
 dput+0x3f2/0x510 fs/dcache.c:857
 ovl_workdir_create+0x2bf/0x750 fs/overlayfs/super.c:304
 ovl_make_workdir fs/overlayfs/super.c:650 [inline]
 ovl_get_workdir+0x328/0x1650 fs/overlayfs/super.c:808
 ovl_fill_super+0x133f/0x36f0 fs/overlayfs/super.c:1381
 vfs_get_super fs/super.c:1283 [inline]
 get_tree_nodev+0xce/0x170 fs/super.c:1302
 ovl_get_tree+0x20/0x30 fs/overlayfs/params.c:610
 vfs_get_tree+0xa1/0x290 fs/super.c:1817
 do_new_mount+0x251/0xb40 fs/namespace.c:3531
 path_mount+0x688/0x1050 fs/namespace.c:3858
 do_mount fs/namespace.c:3871 [inline]
 __do_sys_mount fs/namespace.c:4081 [inline]
 __se_sys_mount+0x2bd/0x480 fs/namespace.c:4058
 __x64_sys_mount+0xc3/0xf0 fs/namespace.c:4058
 x64_sys_call+0x2021/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fe6c7d8eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe6c8c86038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe6c7fd5fa0 RCX: 00007fe6c7d8eba9
RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000
RBP: 00007fe6c7e11e19 R08: 0000200000000200 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe6c7fd6038 R14: 00007fe6c7fd5fa0 R15: 00007fff691b40c8
 </TASK>
---[ end trace 0000000000000000 ]---
overlayfs: failed to create directory ./bus/work (errno: 17); mounting read-only
overlayfs: maximum fs stacking depth exceeded