bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11951/1:b..l..
rcu: (detected by 0, t=10507 jiffies, g=47945, q=1146 ncpus=2)
task:syz.4.1767 state:R running task stack:23336 pid:11951 tgid:11951 ppid:5632 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
_raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
insert_page+0x2db/0x440 mm/memory.c:2539
kcov_mmap+0xc9/0x140 kernel/kcov.c:527
vfs_mmap include/linux/fs.h:2066 [inline]
mmap_file mm/internal.h:238 [inline]
__mmap_new_file_vma mm/vma.c:2618 [inline]
__mmap_new_vma mm/vma.c:2691 [inline]
__mmap_region mm/vma.c:2904 [inline]
mmap_region+0x1bfc/0x25b0 mm/vma.c:2989
do_mmap+0xe0a/0x1300 mm/mmap.c:573
vm_mmap_pgoff+0x272/0x4e0 mm/util.c:581
ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:619
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faaa5d9f2c2
RSP: 002b:00007fff24d302e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007faaa33f2000 RCX: 00007faaa5d9f2c2
RDX: 0000000000000003 RSI: 0000000000400000 RDI: 00007faaa33f2000
RBP: 0000000000000011 R08: 00000000000000dd R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000003 R14: 0000000000000000 R15: 00007faaa6025fa0
rcu: rcu_preempt kthread starved for 1186 jiffies! g47945 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27656 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 4997 Comm: udevd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:ip6_ignore_linkdown+0x7a/0x140 include/net/addrconf.h:462
Code: c0 74 0e e8 f8 58 2a f7 eb 20 e8 f1 58 2a f7 eb 19 e8 1a ab 0d f7 89 c5 31 ff 89 c6 e8 df 5d 2a f7 85 ed 74 44 e8 d6 58 2a f7 <48> 85 db 0f 84 8a 00 00 00 e8 c8 58 2a f7 48 81 c3 50 06 00 00 48
RSP: 0018:ffffc90000006678 EFLAGS: 00000246
RAX: ffffffff8a9e0d4a RBX: ffff888066919000 RCX: ffff88807ea89f40
RDX: 8000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000100 R09: ffffc900000069b0
R10: ffffc90000006800 R11: fffff52000000d02 R12: 0000000000000003
R13: ffff8880675eecc8 R14: dffffc0000000000 R15: 0000000000000001
FS: 00007fdb1d1b9880(0000) GS:ffff888123a6b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555831ed4e8 CR3: 000000007dd24000 CR4: 00000000003526f0
Call Trace:
find_match+0x9c/0xb40 net/ipv6/route.c:792
__find_rr_leaf+0x243/0x740 net/ipv6/route.c:881
find_rr_leaf net/ipv6/route.c:902 [inline]
rt6_select net/ipv6/route.c:946 [inline]
fib6_table_lookup+0x3c6/0xae0 net/ipv6/route.c:2233
ip6_pol_route+0x229/0x14d0 net/ipv6/route.c:2270
pol_lookup_func include/net/ip6_fib.h:672 [inline]
__fib6_rule_action net/ipv6/fib6_rules.c:240 [inline]
fib6_rule_action+0x9d8/0xc00 net/ipv6/fib6_rules.c:278
fib_rules_lookup+0x770/0xeb0 net/core/fib_rules.c:338
fib6_rule_lookup+0x19b/0x6e0 net/ipv6/fib6_rules.c:115
ip6_route_input_lookup net/ipv6/route.c:2341 [inline]
ip6_route_input+0x78d/0xb20 net/ipv6/route.c:2644
ip6_rcv_finish+0x141/0x280 net/ipv6/ip6_input.c:117
ip_sabotage_in+0x1e1/0x270 net/bridge/br_netfilter_hooks.c:989
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:323
__netif_receive_skb_one_core net/core/dev.c:6425 [inline]
__netif_receive_skb net/core/dev.c:6538 [inline]
netif_receive_skb_internal net/core/dev.c:6624 [inline]
netif_receive_skb+0x278/0xbf0 net/core/dev.c:6683
NF_HOOK+0xa4/0x3a0 include/linux/netfilter.h:325
br_handle_frame_finish+0x1219/0x1ae0 net/bridge/br_input.c:237
br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:325 [inline]
br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:293 [inline]
br_handle_frame+0x1329/0x1600 net/bridge/br_input.c:453
__netif_receive_skb_core+0x989/0x30f0 net/core/dev.c:6304
__netif_receive_skb_one_core net/core/dev.c:6423 [inline]
__netif_receive_skb net/core/dev.c:6538 [inline]
process_backlog+0x727/0x18b0 net/core/dev.c:6889
__napi_poll+0xaa/0x330 net/core/dev.c:7958
napi_poll net/core/dev.c:8021 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8178
handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
__do_softirq kernel/softirq.c:703 [inline]
invoke_softirq kernel/softirq.c:542 [inline]
__irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786
irq_exit_rcu+0x9/0x30 kernel/softirq.c:809
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:check_preemption_disabled+0x1/0xd0 lib/smp_processor_id.c:13
Code: 20 17 6e 8c 48 c7 c6 60 17 6e 8c eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 53 65 8b 05 eb cb a6 08 65 48 8b 0d bb cb a6 08 85 c9
RSP: 0018:ffffc90002f1f210 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffffc90002f1f2f8 RCX: ffff88807ea89f40
RDX: ffffc90002f1f301 RSI: ffffffff8c6e1760 RDI: ffffffff8c6e1720
RBP: 1ffffffff2449101 R08: ffffc90002f1fb10 R09: 0000000000000000
R10: ffffc90002f1f338 R11: fffff520005e3e69 R12: ffffc90002f18000
R13: ffffffff8178699f R14: ffffc90002f1f2e8 R15: ffffc90002f1fb20
rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
rcu_is_watching+0x16/0xb0 kernel/rcu/tree.c:753
rcu_read_unlock include/linux/rcupdate.h:878 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x1b66/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
__slab_free+0x274/0x2c0 mm/slub.c:5823
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_noprof+0x302/0x710 mm/slub.c:5439
_kmalloc_noprof include/linux/slab.h:995 [inline]
tomoyo_realpath_from_path+0xef/0x640 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x283/0x560 security/tomoyo/file.c:827
security_inode_getattr+0x12b/0x310 security/security.c:1917
vfs_getattr+0x23/0x70 fs/stat.c:263
vfs_statx_path+0x2b/0x230 fs/stat.c:303
vfs_statx+0x12e/0x200 fs/stat.c:360
vfs_fstatat+0x11b/0x170 fs/stat.c:377
__do_sys_newfstatat fs/stat.c:542 [inline]
__se_sys_newfstatat+0x118/0x3a0 fs/stat.c:536
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb1d311b0a
Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7
RSP: 002b:00007ffcc700d398 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00005626e910cfa0 RCX: 00007fdb1d311b0a
RDX: 00007ffcc700d3a0 RSI: 00005626e910cfa0 RDI: 00000000ffffff9c
RBP: 00005626e90fbbf0 R08: 00063478c1c69200 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc700d3a0
R13: 00005626d93ab100 R14: 0000000000000000 R15: 0000000000000000