oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=16034,uid=0 Memory cgroup out of memory: Killed process 16034 (syz-executor.0) total-vm:42412kB, anon-rss:372kB, file-rss:644kB, shmem-rss:0kB, UID:0 pgtables:60kB oom_score_adj:1000 ===================================== WARNING: bad unlock balance detected! syzkaller #0 Not tainted ------------------------------------- syz-executor.0/16034 is trying to release lock (&sighand->siglock) at: [] spin_unlock include/linux/spinlock.h:391 [inline] [] copy_process+0x22d4/0x31ec kernel/fork.c:2432 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor.0/16034: #0: ffff80008f9e0110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x2228/0x31ec kernel/fork.c:2274 stack backtrace: CPU: 1 UID: 0 PID: 16034 Comm: syz-executor.0 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_unlock_imbalance_bug+0xf4/0xfc kernel/locking/lockdep.c:5298 __lock_release kernel/locking/lockdep.c:-1 [inline] lock_release+0x244/0x39c kernel/locking/lockdep.c:5889 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline] _raw_spin_unlock+0x24/0x78 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] copy_process+0x22d4/0x31ec kernel/fork.c:2432 kernel_clone+0x1d8/0x84c kernel/fork.c:2605 __do_sys_clone kernel/fork.c:2748 [inline] __se_sys_clone kernel/fork.c:2716 [inline] __arm64_sys_clone+0x144/0x1a0 kernel/fork.c:2716 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596