===================================== WARNING: bad unlock balance detected! syzkaller #0 Not tainted ------------------------------------- syz.2.19/6466 is trying to release lock (rcu_read_lock) at: [] rcu_lock_release include/linux/rcupdate.h:341 [inline] [] rcu_read_unlock include/linux/rcupdate.h:897 [inline] [] bpf_test_timer_leave+0x1d0/0x290 net/bpf/test_run.c:48 but there are no more locks to release! other info that might help us debug this: no locks held by syz.2.19/6466. stack backtrace: CPU: 1 UID: 0 PID: 6466 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_unlock_imbalance_bug+0xdc/0xf0 kernel/locking/lockdep.c:5298 __lock_release kernel/locking/lockdep.c:5527 [inline] lock_release+0x212/0x3e0 kernel/locking/lockdep.c:5889 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] bpf_test_timer_leave+0x1dc/0x290 net/bpf/test_run.c:48 bpf_test_timer_continue+0x244/0x320 net/bpf/test_run.c:74 bpf_prog_test_run_flow_dissector+0x39c/0x5c0 net/bpf/test_run.c:1417 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4688 __sys_bpf+0x562/0x860 kernel/bpf/syscall.c:6167 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline] __se_sys_bpf kernel/bpf/syscall.c:6257 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6257 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa2f6f8efc9 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 RSP: 002b:00007fa2f7e1c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fa2f71e5fa0 RCX: 00007fa2f6f8efc9 RDX: 0000000000000050 RSI: 0000200000000180 RDI: 000000000000000a RBP: 00007fa2f7011f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa2f71e6038 R14: 00007fa2f71e5fa0 R15: 00007ffee539e9b8 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6466 at kernel/rcu/tree_plugin.h:443 __rcu_read_unlock+0x7a/0xe0 kernel/rcu/tree_plugin.h:443