syzbot

veth0_vlan: entered promiscuous mode
veth1_macvtap: entered promiscuous mode
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WARNING: CPU: 0 PID: 371 at fs/overlayfs/util.c:602 ovl_dir_version_inc fs/overlayfs/util.c:602 [inline]
WARNING: CPU: 0 PID: 371 at fs/overlayfs/util.c:602 ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:620
Modules linked in:
CPU: 0 UID: 0 PID: 371 Comm: syz-executor Not tainted syzkaller #0 79a81a3ed2cf63e2a306eb4bbf59144c10c9503d
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:ovl_dir_version_inc fs/overlayfs/util.c:602 [inline]
RIP: 0010:ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:620
Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 5e 8b 97 ff 49 ff 06 5b 41 5c 41 5d 41 5e 41 5f 5d e9 0c 33 59 03 cc e8 f6 bf 3f ff <0f> 0b e9 3e ff ff ff e8 ea bf 3f ff 0f 0b e9 6e ff ff ff 44 89 f9
RSP: 0018:ffffc900011cfb48 EFLAGS: 00010293
RAX: ffffffff8247dd1a RBX: 0000000000000000 RCX: ffff888115b1b900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900011cfb70 R08: ffff888110d8cf3f R09: 1ffff110221b19e7
R10: dffffc0000000000 R11: ffffed10221b19e8 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888110d8cea0 R15: ffff888110791cc0
FS:  000055557ce77500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557ce92908 CR3: 0000000114350000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 ovl_remove_upper fs/overlayfs/dir.c:841 [inline]
 ovl_do_remove+0x81b/0xda0 fs/overlayfs/dir.c:912
 ovl_rmdir+0x1e/0x30 fs/overlayfs/dir.c:945
 vfs_rmdir+0x3e3/0x560 fs/namei.c:4348
 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+0x406/0x4a0 fs/namespace.c:1380
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1387
 task_work_run+0x1e5/0x260 kernel/task_work.c:246
 resume_user_mode_work+0x35/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x63/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x63/0xf0 arch/x86/entry/common.c:84
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fef1039c1d7
Code: a2 c7 05 bc c3 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffdad37ac88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fef10430b3b RCX: 00007fef1039c1d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdad37ad40
RBP: 00007ffdad37ad40 R08: 00007ffdad37bd40 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdad37bdd0
R13: 00007fef10430b3b R14: 0000000000007a51 R15: 00007ffdad37be10
 </TASK>
---[ end trace 0000000000000000 ]---
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WARNING: CPU: 1 PID: 371 at fs/overlayfs/util.c:602 ovl_dir_version_inc fs/overlayfs/util.c:602 [inline]
WARNING: CPU: 1 PID: 371 at fs/overlayfs/util.c:602 ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:620
Modules linked in:
CPU: 1 UID: 0 PID: 371 Comm: syz-executor Tainted: G        W          syzkaller #0 79a81a3ed2cf63e2a306eb4bbf59144c10c9503d
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:ovl_dir_version_inc fs/overlayfs/util.c:602 [inline]
RIP: 0010:ovl_dir_modified+0x15a/0x190 fs/overlayfs/util.c:620
Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 5e 8b 97 ff 49 ff 06 5b 41 5c 41 5d 41 5e 41 5f 5d e9 0c 33 59 03 cc e8 f6 bf 3f ff <0f> 0b e9 3e ff ff ff e8 ea bf 3f ff 0f 0b e9 6e ff ff ff 44 89 f9
RSP: 0018:ffffc900011cfb48 EFLAGS: 00010293
RAX: ffffffff8247dd1a RBX: 0000000000000000 RCX: ffff888115b1b900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900011cfb70 R08: ffff888110d8cf3f R09: 1ffff110221b19e7
R10: dffffc0000000000 R11: ffffed10221b19e8 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888110d8cea0 R15: ffff888110791cc0
FS:  000055557ce77500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000032f55c0 CR3: 0000000114350000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 ovl_remove_upper fs/overlayfs/dir.c:841 [inline]
 ovl_do_remove+0x81b/0xda0 fs/overlayfs/dir.c:912
 ovl