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:d2:0a:6b:16:6a:a0, vlan:0)
------------[ cut here ]------------
WARNING: kernel/rcu/tree_stall.h:1049 at rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049, CPU#1: syz.5.9239/7763
Modules linked in:
CPU: 1 UID: 0 PID: 7763 Comm: syz.5.9239 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049
Code: ff ff 48 c7 c7 a0 55 8e 99 be 04 00 00 00 e8 73 35 80 00 4c 89 f7 b8 01 00 00 00 87 05 e5 23 e6 17 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 00 6e f4 8d 74 47 48 c7 c0 a0 54 82 8f 48 c1 e8
RSP: 0000:ffffc90000a08b78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a06 RCX: ffffffff81a831ad
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8df46e00
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff331cab4 R12: 0000000000002904
R13: 1ffff110170e771a R14: ffffffff8df46e00 R15: dffffc0000000000
FS: 00007f2e7daa16c0(0000) GS:ffff888125f32000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e7da80d58 CR3: 0000000032f08000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
rcu_core+0x6a9/0x1870 kernel/rcu/tree.c:2852
handle_softirqs+0x27d/0x850 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__rwsem_set_reader_owned kernel/locking/rwsem.c:175 [inline]
RIP: 0010:rwsem_set_reader_owned kernel/locking/rwsem.c:182 [inline]
RIP: 0010:rwsem_read_trylock kernel/locking/rwsem.c:257 [inline]
RIP: 0010:__down_read_common kernel/locking/rwsem.c:1260 [inline]
RIP: 0010:__down_read kernel/locking/rwsem.c:1274 [inline]
RIP: 0010:down_read+0x241/0x2e0 kernel/locking/rwsem.c:1539
Code: 48 83 c3 08 48 89 df be 08 00 00 00 e8 78 82 ca f6 49 89 dc 49 c1 ec 03 43 80 3c 3c 00 74 08 48 89 df e8 f2 7f ca f6 48 8b 03 <83> e0 02 49 09 c6 49 83 ce 01 48 89 df be 08 00 00 00 e8 78 82 ca
RSP: 0000:ffffc9000e32f960 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff88802c37d898 RCX: ffffffff8b5de478
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88802c37d898
RBP: ffffc9000e32fb10 R08: ffff88802c37d89f R09: 1ffff1100586fb13
R10: dffffc0000000000 R11: ffffed100586fb14 R12: 1ffff1100586fb13
R13: ffff8880256a1e80 R14: ffff8880256a1e80 R15: dffffc0000000000
mmap_read_lock include/linux/mmap_lock.h:391 [inline]
acct_collect+0x16b/0x760 kernel/acct.c:570
do_exit+0x5cb/0x2310 kernel/exit.c:935
do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
irqentry_exit+0x177/0x660 kernel/entry/common.c:196
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0033:0x7f2e7cb8f749
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:00007f2e7daa1038 EFLAGS: 00000246
RAX: 0000000000000007 RBX: 00007f2e7cde5fa0 RCX: 00007f2e7cb8f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007f2e7cc13f91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2e7cde6038 R14: 00007f2e7cde5fa0 R15: 00007ffd47cfd668
----------------
Code disassembly (best guess):
0: 48 83 c3 08 add $0x8,%rbx
4: 48 89 df mov %rbx,%rdi
7: be 08 00 00 00 mov $0x8,%esi
c: e8 78 82 ca f6 call 0xf6ca8289
11: 49 89 dc mov %rbx,%r12
14: 49 c1 ec 03 shr $0x3,%r12
18: 43 80 3c 3c 00 cmpb $0x0,(%r12,%r15,1)
1d: 74 08 je 0x27
1f: 48 89 df mov %rbx,%rdi
22: e8 f2 7f ca f6 call 0xf6ca8019
27: 48 8b 03 mov (%rbx),%rax
* 2a: 83 e0 02 and $0x2,%eax <-- trapping instruction
2d: 49 09 c6 or %rax,%r14
30: 49 83 ce 01 or $0x1,%r14
34: 48 89 df mov %rbx,%rdi
37: be 08 00 00 00 mov $0x8,%esi
3c: e8 .byte 0xe8
3d: 78 82 js 0xffffffc1
3f: ca .byte 0xca