bridge: RTM_NEWNEIGH with invalid ether address ============================= WARNING: suspicious RCU usage 6.12.0-rc7-syzkaller-01715-ge867ed3ac8aa #0 Not tainted ----------------------------- kernel/events/callchain.c:162 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz.3.221/6751: #0: ffffffff8e938260 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e938260 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 include/linux/rcupdate_trace.h:57 stack backtrace: CPU: 0 UID: 0 PID: 6751 Comm: syz.3.221 Not tainted 6.12.0-rc7-syzkaller-01715-ge867ed3ac8aa #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x226/0x340 kernel/locking/lockdep.c:6821 get_callchain_entry+0x2b2/0x3c0 kernel/events/callchain.c:162 get_perf_callchain+0xec/0x970 kernel/events/callchain.c:226 __bpf_get_stack+0x41f/0xad0 kernel/bpf/stackmap.c:454 ____bpf_get_stack kernel/bpf/stackmap.c:499 [inline] bpf_get_stack+0x33/0x50 kernel/bpf/stackmap.c:496 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1909 [inline] bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1899 bpf_prog_d43750871481577d+0x46/0x4a 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_prog_run_pin_on_cpu+0x67/0x150 include/linux/filter.h:725 bpf_prog_test_run_syscall+0x316/0x4e0 net/bpf/test_run.c:1560 bpf_prog_test_run+0x2e4/0x360 kernel/bpf/syscall.c:4266 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5671 __do_sys_bpf kernel/bpf/syscall.c:5760 [inline] __se_sys_bpf kernel/bpf/syscall.c:5758 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5758 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe62497e759 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:00007fe6256cc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe624b35f80 RCX: 00007fe62497e759 RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a RBP: 00007fe6249f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe624b35f80 R15: 00007fff6d811348