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): P18236/1:b..l rcu: (detected by 1, t=10503 jiffies, g=75665, q=1600 ncpus=2) task:syz-executor state:R running task stack:28192 pid:18236 tgid:18236 ppid:16293 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5295 [inline] __schedule+0x15dd/0x52d0 kernel/sched/core.c:6908 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235 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:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872 Code: e9 30 ff ff ff e8 35 49 0d 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 b1 06 7a 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 16 2f 10 0a cc 48 8d 3d 2e f5 72 RSP: 0018:ffffc900066476f8 EFLAGS: 00000282 RAX: a15d2850d1be1a00 RBX: 0000000000000246 RCX: 0000000000000046 RDX: 00000000d98d6920 RSI: ffffffff8e192645 RDI: ffffffff8c27b500 RBP: 0000000000000000 R08: ffffffff81767de5 R09: ffffffff8e75e420 R10: ffffc90006647858 R11: ffffffff81b0bfa0 R12: 0000000000000002 R13: ffffffff8e75e420 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:4542 [inline] slab_alloc_node mm/slub.c:4869 [inline] kmem_cache_alloc_lru_noprof+0x2b8/0x640 mm/slub.c:4888 __d_alloc+0x37/0x6f0 fs/dcache.c:1740 d_alloc+0x4b/0x190 fs/dcache.c:1819 lookup_one_qstr_excl+0xdc/0x360 fs/namei.c:1801 __start_dirop fs/namei.c:2925 [inline] start_dirop fs/namei.c:2934 [inline] filename_create+0x20e/0x370 fs/namei.c:4922 filename_symlinkat+0xf7/0x410 fs/namei.c:5634 __do_sys_symlinkat fs/namei.c:5660 [inline] __se_sys_symlinkat+0x4e/0x2b0 fs/namei.c:5655 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: 0033:0x7fd82e19b857 RSP: 002b:00007ffda933cc78 EFLAGS: 00000206 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd82e19b857 RDX: 00007fd82e233c52 RSI: 00000000ffffff9c RDI: 00007ffda933cd10 RBP: 00007ffda933ccbc R08: 0000000000000001 R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000060 R13: 00000000000927c0 R14: 0000000000073814 R15: 00007ffda933cd10 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 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 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 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 veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)