============================= [ BUG: Invalid wait context ] 6.12.0-syzkaller-01782-gbf9aa14fc523 #0 Not tainted ----------------------------- syz.3.1346/8976 is trying to lock: ffff88802abb5200 (&trie->lock){..-.}-{3:3}, at: trie_delete_elem+0xb0/0x820 kernel/bpf/lpm_trie.c:462 other info that might help us debug this: context-{5:5} 2 locks held by syz.3.1346/8976: #0: ffff88806a73eed8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598 #1: ffffffff8e1bb180 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #1: ffffffff8e1bb180 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffffff8e1bb180 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2315 [inline] #1: ffffffff8e1bb180 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run4+0x1d6/0x5a0 kernel/trace/bpf_trace.c:2359 stack backtrace: CPU: 1 UID: 0 PID: 8976 Comm: syz.3.1346 Not tainted 6.12.0-syzkaller-01782-gbf9aa14fc523 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline] check_wait_context kernel/locking/lockdep.c:4898 [inline] __lock_acquire+0x878/0x3c40 kernel/locking/lockdep.c:5176 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 trie_delete_elem+0xb0/0x820 kernel/bpf/lpm_trie.c:462 bpf_prog_5186c38a4019a4cb+0x4b/0x4f bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2316 [inline] bpf_trace_run4+0x245/0x5a0 kernel/trace/bpf_trace.c:2359 __bpf_trace_sched_switch+0x13e/0x190 include/trace/events/sched.h:222 __traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:222 trace_sched_switch include/trace/events/sched.h:222 [inline] __schedule+0x1b72/0x5ae0 kernel/sched/core.c:6753 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6848 futex_wait_queue+0xfc/0x1f0 kernel/futex/waitwake.c:370 __futex_wait+0x291/0x3c0 kernel/futex/waitwake.c:669 futex_wait+0xe9/0x380 kernel/futex/waitwake.c:697 do_futex+0x22b/0x350 kernel/futex/syscalls.c:102 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex kernel/futex/syscalls.c:160 [inline] __x64_sys_futex+0x1e1/0x4c0 kernel/futex/syscalls.c:160 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcb6fb7e819 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:00007fcb709b00e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007fcb6fd35fa8 RCX: 00007fcb6fb7e819 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcb6fd35fa8 RBP: 00007fcb6fd35fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcb6fd35fac R13: 0000000000000000 R14: 00007fff9ec6a4d0 R15: 00007fff9ec6a5b8