Warning: Permanently added '10.128.0.89' (ED25519) to the list of known hosts. 2025/02/18 06:54:30 ignoring optional flag "sandboxArg"="0" 2025/02/18 06:54:30 parsed 1 programs [ 63.330615][ T2656] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k 2025/02/18 06:54:35 executed programs: 0 [ 68.292941][ T3546] [ 68.295294][ T3546] ============================================ [ 68.301434][ T3546] WARNING: possible recursive locking detected [ 68.307555][ T3546] 6.14.0-rc2-syzkaller #0 Not tainted [ 68.312890][ T3546] -------------------------------------------- [ 68.319003][ T3546] syz.3.16/3546 is trying to acquire lock: [ 68.324769][ T3546] ffff8881006ce948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x4a/0x150 [ 68.334713][ T3546] [ 68.334713][ T3546] but task is already holding lock: [ 68.342041][ T3546] ffff8881006ce948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_node_dentry+0x56/0x120 [ 68.351723][ T3546] [ 68.351723][ T3546] other info that might help us debug this: [ 68.359745][ T3546] Possible unsafe locking scenario: [ 68.359745][ T3546] [ 68.367157][ T3546] CPU0 [ 68.370403][ T3546] ---- [ 68.373647][ T3546] lock(&root->kernfs_rwsem); [ 68.378378][ T3546] lock(&root->kernfs_rwsem); [ 68.383099][ T3546] [ 68.383099][ T3546] *** DEADLOCK *** [ 68.383099][ T3546] [ 68.391204][ T3546] May be due to missing lock nesting notation [ 68.391204][ T3546] [ 68.399484][ T3546] 3 locks held by syz.3.16/3546: [ 68.404379][ T3546] #0: ffff888104ff0670 (&fc->uapi_mutex){+.+.}-{4:4}, at: __se_sys_fsconfig+0x31e/0x4c0 [ 68.414145][ T3546] #1: ffff8881053fa0e0 (&type->s_umount_key#46){+.+.}-{4:4}, at: super_lock+0x11c/0x170 [ 68.423911][ T3546] #2: ffff8881006ce948 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_node_dentry+0x56/0x120 [ 68.434151][ T3546] [ 68.434151][ T3546] stack backtrace: [ 68.440015][ T3546] CPU: 0 UID: 0 PID: 3546 Comm: syz.3.16 Not tainted 6.14.0-rc2-syzkaller #0 [ 68.440019][ T3546] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 68.440024][ T3546] Call Trace: [ 68.440026][ T3546] [ 68.440029][ T3546] dump_stack_lvl+0xa3/0x100 [ 68.440034][ T3546] print_deadlock_bug+0x244/0x260 [ 68.440038][ T3546] __lock_acquire+0x10c4/0x2570 [ 68.440043][ T3546] ? kernfs_dop_revalidate+0x4a/0x150 [ 68.440046][ T3546] lock_acquire+0xeb/0x270 [ 68.440050][ T3546] ? kernfs_dop_revalidate+0x4a/0x150 [ 68.440053][ T3546] ? __d_lookup+0x10b/0x250 [ 68.440056][ T3546] down_read+0x4a/0x440 [ 68.440061][ T3546] ? kernfs_dop_revalidate+0x4a/0x150 [ 68.440063][ T3546] ? __d_lookup+0x38/0x250 [ 68.440065][ T3546] kernfs_dop_revalidate+0x4a/0x150 [ 68.440068][ T3546] lookup_one_unlocked+0x73/0xf0 [ 68.440072][ T3546] lookup_positive_unlocked+0x18/0x50 [ 68.440074][ T3546] kernfs_node_dentry+0xa0/0x120 [ 68.440078][ T3546] cgroup_do_get_tree+0x165/0x1b0 [ 68.440082][ T3546] cgroup_get_tree+0x33/0xe0 [ 68.440085][ T3546] vfs_get_tree+0x24/0xb0 [ 68.440089][ T3546] vfs_cmd_create+0x53/0xc0 [ 68.440093][ T3546] __se_sys_fsconfig+0x357/0x4c0 [ 68.440096][ T3546] do_syscall_64+0xa0/0x180 [ 68.440100][ T3546] ? clear_bhb_loop+0x55/0xb0 [ 68.440104][ T3546] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 68.440108][ T3546] RIP: 0033:0x7fb9ecf8cde9 [ 68.440112][ T3546] 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 [ 68.440114][ T3546] RSP: 002b:00007fb9edd04038 EFLAGS: 00000246 ORIG_RAX: 00000000000001af [ 68.440117][ T3546] RAX: ffffffffffffffda RBX: 00007fb9ed1a5fa0 RCX: 00007fb9ecf8cde9 [ 68.440119][ T3546] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003 [ 68.440120][ T3546] RBP: 00007fb9ed00e2a0 R08: 0000000000000000 R09: 0000000000000000 [ 68.440121][ T3546] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 68.440122][ T3546] R13: 0000000000000000 R14: 00007fb9ed1a5fa0 R15: 00007fffceb90f08 [ 68.440124][ T3546] 2025/02/18 06:54:40 executed programs: 165 2025/02/18 06:54:45 executed programs: 465