[ 429.085330][T15192] [ 429.087683][T15192] ===================================== [ 429.093199][T15192] WARNING: bad unlock balance detected! [ 429.098718][T15192] syzkaller #0 Not tainted [ 429.103101][T15192] ------------------------------------- [ 429.108611][T15192] syz.5.2624/15192 is trying to release lock (&sighand->siglock) at: [ 429.116640][T15192] [] copy_process+0x105f/0x1310 [ 429.123024][T15192] but there are no more locks to release! [ 429.128710][T15192] [ 429.128710][T15192] other info that might help us debug this: [ 429.136733][T15192] 1 lock held by syz.5.2624/15192: [ 429.141806][T15192] #0: ffffffff8379cf48 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0xb05/0x1310 [ 429.152014][T15192] [ 429.152014][T15192] stack backtrace: [ 429.157882][T15192] CPU: 0 UID: 0 PID: 15192 Comm: syz.5.2624 Not tainted syzkaller #0 PREEMPT(none) [ 429.157886][T15192] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 [ 429.157893][T15192] Call Trace: [ 429.157897][T15192] [ 429.157899][T15192] dump_stack_lvl+0xad/0x110 [ 429.157905][T15192] ? copy_process+0x105f/0x1310 [ 429.157907][T15192] print_unlock_imbalance_bug+0xdc/0xf0 [ 429.157912][T15192] lock_release+0x1fe/0x2f0 [ 429.157915][T15192] ? copy_process+0x105f/0x1310 [ 429.157918][T15192] _raw_spin_unlock+0x16/0x50 [ 429.157922][T15192] copy_process+0x105f/0x1310 [ 429.157925][T15192] ? copy_process+0x35c/0x1310 [ 429.157928][T15192] kernel_clone+0xf6/0x390 [ 429.157933][T15192] __se_sys_clone3+0x1c9/0x1e0 [ 429.157939][T15192] ? lockdep_hardirqs_on+0x98/0x100 [ 429.157943][T15192] do_syscall_64+0xa6/0xfa0 [ 429.157947][T15192] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.157949][T15192] ? clear_bhb_loop+0x60/0xb0 [ 429.157952][T15192] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.157956][T15192] RIP: 0033:0x7f581c473609 [ 429.157960][T15192] Code: d7 08 00 48 8d 3d 9c d7 08 00 e8 e2 28 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7 [ 429.157962][T15192] RSP: 002b:00007ffcac960908 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3 [ 429.157966][T15192] RAX: ffffffffffffffda RBX: 00007f581c3f59f0 RCX: 00007f581c473609 [ 429.157967][T15192] RDX: 00007f581c3f59f0 RSI: 0000000000000058 RDI: 00007ffcac960950 [ 429.157969][T15192] RBP: 00007f581c2af6c0 R08: 00007f581c2af6c0 R09: 00007ffcac960a37 [ 429.157970][T15192] R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8 [ 429.157972][T15192] R13: 000000000000000b R14: 00007ffcac960950 R15: 00007ffcac960a38 [ 429.157975][T15192] [ 429.559681][ T37] veth0_vlan: left promiscuous mode [ 429.565104][ T37] veth0_vlan: left promiscuous mode [ 429.570558][ T37] veth0_vlan: left promiscuous mode [ 429.575939][ T37] veth0_vlan: left promiscuous mode [ 429.581448][ T37] veth0_vlan: left promiscuous mode Warning: Permanently added '10.128.1.231' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program