bridge0: received packet on bridge_slave_0 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): P18854/1:b..l rcu: (detected by 1, t=10503 jiffies, g=116105, q=1911 ncpus=2) task:syz.3.3547 state:R running task stack:25536 pid:18854 tgid:18852 ppid:16803 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x149b/0x4fd0 kernel/sched/core.c:6863 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_acquire+0x222/0x340 kernel/locking/lockdep.c:5872 Code: ff ff ff e8 70 40 bc 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 5a 5f e2 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 3f 1f bf 09 cc 48 8d 3d 97 84 e7 RSP: 0018:ffffc9000d0b7468 EFLAGS: 00000282 RAX: c84ae4834a90fb00 RBX: 0000000000000000 RCX: 0000000000000046 RDX: 000000009b256778 RSI: ffffffff8d9779a6 RDI: ffffffff8bc08760 RBP: ffffffff82133aa9 R08: ffffffff82133aa9 R09: ffffffff8df41aa0 R10: ffffc9000d0b77ac R11: fffff52001a16efe R12: 0000000000000002 R13: ffffffff8df41aa0 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] ___pte_offset_map+0x45/0x240 mm/pgtable-generic.c:288 __pte_offset_map include/linux/mm.h:3346 [inline] __pte_offset_map_lock+0x46/0x210 mm/pgtable-generic.c:399 pte_offset_map_lock include/linux/mm.h:3361 [inline] do_anonymous_page mm/memory.c:5198 [inline] do_pte_missing+0xac1/0x3330 mm/memory.c:4399 handle_pte_fault mm/memory.c:6273 [inline] __handle_mm_fault mm/memory.c:6411 [inline] handle_mm_fault+0x1b26/0x32b0 mm/memory.c:6580 do_user_addr_fault+0x764/0x1380 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x71/0xd0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0010:rep_movs_alternative+0x30/0x90 arch/x86/lib/copy_user_64.S:60 Code: 83 f9 08 73 25 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 8d 40 04 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <48> 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 RSP: 0018:ffffc9000d0b7a18 EFLAGS: 00050206 RAX: 00007ffffffff001 RBX: 0000000000000038 RCX: 0000000000000038 RDX: 0000000000000001 RSI: 000020000017c000 RDI: ffffc9000d0b7aa0 RBP: ffffc9000d0b7c30 R08: ffffc9000d0b7ad7 R09: 1ffff92001a16f5a R10: dffffc0000000000 R11: fffff52001a16f5b R12: 0000000000000002 R13: dffffc0000000000 R14: ffffc9000d0b7aa0 R15: 000020000017c000 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] _inline_copy_from_user include/linux/uaccess.h:185 [inline] _copy_from_user+0x7a/0xb0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:223 [inline] copy_msghdr_from_user net/socket.c:2522 [inline] recvmsg_copy_msghdr net/socket.c:2778 [inline] ___sys_recvmsg+0x12e/0x510 net/socket.c:2850 do_recvmmsg+0x307/0x770 net/socket.c:2949 __sys_recvmmsg net/socket.c:3023 [inline] __do_sys_recvmmsg net/socket.c:3046 [inline] __se_sys_recvmmsg net/socket.c:3039 [inline] __x64_sys_recvmmsg+0x190/0x240 net/socket.c:3039 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1fe938f749 RSP: 002b:00007f1fe75d5038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f1fe95e6090 RCX: 00007f1fe938f749 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000004 RBP: 00007f1fe9413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1fe95e6128 R14: 00007f1fe95e6090 R15: 00007f1fe970fa28 net_ratelimit: 15028 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:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, 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: 16223 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 bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, 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)