bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6265/1:b..l rcu: (detected by 1, t=10503 jiffies, g=12953, q=1872 ncpus=2) task:syz-executor state:R running task stack:26904 pid:6265 tgid:6265 ppid:5823 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5298 [inline] __schedule+0x15dd/0x52d0 kernel/sched/core.c:6911 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7238 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:kasan_check_byte include/linux/kasan.h:402 [inline] RIP: 0010:lock_acquire+0x71/0x2e0 kernel/locking/lockdep.c:5842 Code: c0 48 0f a3 05 20 47 70 0e 73 0d e8 c9 35 09 00 84 c0 0f 84 bc 01 00 00 83 3d 1a 7a 70 0e 00 0f 84 c3 00 00 00 48 8b 74 24 68 <4c> 89 ef e8 c7 4f 8e 00 83 3d 00 7a 70 0e 00 0f 84 c1 00 00 00 65 RSP: 0018:ffffc9000560f080 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffffff82474513 RCX: 0000000080000001 RDX: 0000000000000000 RSI: ffffffff81768a72 RDI: ffffffff8c27d520 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc9000560f218 R11: ffffffff81b0dc10 R12: 0000000000000002 R13: ffffffff8e75e5a0 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4538 [inline] slab_alloc_node mm/slub.c:4866 [inline] kmem_cache_alloc_lru_noprof+0x2b8/0x640 mm/slub.c:4885 proc_alloc_inode+0x2a/0xc0 fs/proc/inode.c:57 alloc_inode+0x6a/0x1b0 fs/inode.c:347 new_inode+0x22/0x170 fs/inode.c:1185 proc_pid_make_inode+0x21/0x130 fs/proc/base.c:1953 proc_pid_make_base_inode fs/proc/base.c:2004 [inline] proc_pid_instantiate+0x53/0x2b0 fs/proc/base.c:3489 proc_pid_lookup+0x2fa/0x420 fs/proc/base.c:3532 proc_root_lookup+0x20/0x50 fs/proc/root.c:405 __lookup_slow+0x2b7/0x410 fs/namei.c:1916 lookup_slow+0x53/0x70 fs/namei.c:1933 walk_component fs/namei.c:2279 [inline] link_path_walk+0x1273/0x18d0 fs/namei.c:2650 path_openat+0x2c3/0x3860 fs/namei.c:4832 do_file_open+0x23e/0x4a0 fs/namei.c:4865 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8a7c35d04e RSP: 002b:00007ffe022894d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000555578f93500 RCX: 00007f8a7c35d04e RDX: 0000000000080001 RSI: 00007f8a7c433c26 RDI: ffffffffffffff9c RBP: 00007f8a7c433c26 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 00007ffe022895b0 R14: 00000000000181fc R15: 00007ffe02289b20 bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 19033 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)