syzbot

WARNING: CPU: 0 PID: 297 at fs/overlayfs/util.c:600 ovl_dir_version_inc fs/overlayfs/util.c:600 [inline]
WARNING: CPU: 0 PID: 297 at fs/overlayfs/util.c:600 ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:618
Modules linked in:
CPU: 0 UID: 0 PID: 297 Comm: syz-executor158 Not tainted 6.12.30-syzkaller-g3bff0858a069 #0 051941c7a2def972631bf72fe68480c4884f2578
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ovl_dir_version_inc fs/overlayfs/util.c:600 [inline]
RIP: 0010:ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:618
Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 6e 78 99 ff 49 ff 06 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 76 7d 43 ff <0f> 0b e9 3e ff ff ff e8 6a 7d 43 ff 0f 0b e9 6e ff ff ff 44 89 f9
RSP: 0018:ffffc900011cf988 EFLAGS: 00010293
RAX: ffffffff82422d8a RBX: 0000000000000000 RCX: ffff88812ee4b900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900011cf9b0 R08: ffff88811d6cd2df R09: 1ffff11023ad9a5b
R10: dffffc0000000000 R11: ffffed1023ad9a5c R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88811d6cd240 R15: ffff88811d44f990
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c66ed70f0 CR3: 0000000101f50000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ovl_remove_upper fs/overlayfs/dir.c:841 [inline]
 ovl_do_remove+0x7b8/0xcf0 fs/overlayfs/dir.c:912
 ovl_rmdir+0x1e/0x30 fs/overlayfs/dir.c:945
 vfs_rmdir+0x3e0/0x560 fs/namei.c:4340
 incfs_kill_sb+0x109/0x230 fs/incfs/vfs.c:1968
 deactivate_locked_super+0xd5/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1374
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1381
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9b4/0x2630 kernel/exit.c:944
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 __do_sys_exit_group kernel/exit.c:1105 [inline]
 __se_sys_exit_group kernel/exit.c:1103 [inline]
 __x64_sys_exit_group+0x43/0x50 kernel/exit.c:1103
 x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f6c66e5ac89
Code: Unable to access opcode bytes at 0x7f6c66e5ac5f.
RSP: 002b:00007fff12bb5438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f6c66e5ac89
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 00007f6c66ed6290 R08: ffffffffffffffb8 R09: 0000000000000006
R10: 0000000001004002 R11: 0000000000000246 R12: 00007f6c66ed6290
R13: 0000000000000000 R14: 00007f6c66ed6ce0 R15: 00007f6c66e2c2d0
 </TASK>
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 297 at fs/overlayfs/util.c:600 ovl_dir_version_inc fs/overlayfs/util.c:600 [inline]
WARNING: CPU: 1 PID: 297 at fs/overlayfs/util.c:600 ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:618
Modules linked in:
CPU: 1 UID: 0 PID: 297 Comm: syz-executor158 Tainted: G        W          6.12.30-syzkaller-g3bff0858a069 #0 051941c7a2def972631bf72fe68480c4884f2578
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ovl_dir_version_inc fs/overlayfs/util.c:600 [inline]
RIP: 0010:ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:618
Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 6e 78 99 ff 49 ff 06 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 76 7d 43 ff <0f> 0b e9 3e ff ff ff e8 6a 7d 43 ff 0f 0b e9 6e ff ff ff 44 89 f9
RSP: 0018:ffffc900011cf988 EFLAGS: 00010293
RAX: ffffffff82422d8a RBX: 0000000000000000 RCX: ffff88812ee4b900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900011cf9b0 R08: ffff88811d6cd2df R09: 1ffff11023ad9a5b
R10: dffffc0000000000 R11: ffffed1023ad9a5c R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88811d6cd240 R15: ffff88811d44f990
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000308c8258 CR3: 000000010bbdc000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ovl_remove_upper fs/overlayfs/dir.c:841 [inline]
 ovl_do_remove+0x7b8/0xcf0 fs/overlayfs/dir.c:912
 ovl_rmdir+0x1e/0x30 fs/overlayfs/dir.c:945
 vfs_rmdir+0x3e0/0x560 fs/namei.c:4340
 incfs_kill_sb+0x1a0/0x230 fs/incfs/vfs.c:1972
 deactivate_locked_super+0xd5/0x2a0 fs/super.c:476
 deactivate_super+0xb8/0xe0 fs/super.c:509
 cleanup_mnt+0x3f1/0x480 fs/namespace.c:1374
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1381
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x9b4/0x2630 kernel/exit.c:944
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 __do_sys_exit_group kernel/exit.c:1105 [inline]
 __se_sys_exit_group kernel/exit.c:1103 [inline]
 __x64_sys_exit_group+0x43/0x50 kernel/exit.c:1103
 x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f6c66e5ac89
Code: Unable to access opcode bytes at 0x7f6c66e5ac5f.
RSP: 002b:00007fff12bb5438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f6c66e5ac89
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 00007f6c66ed62