bridge0: received packet on veth1_to_bridge with own address as source address (addr:86:01:47:e3:cc:15, vlan:1)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:1)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P23261/1:b..l..
rcu: (detected by 1, t=10503 jiffies, g=115349, q=1721 ncpus=2)
task:syz-executor state:R running task stack:28168 pid:23261 tgid:23261 ppid:18486 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:239 [inline]
RIP: 0010:unwind_next_frame+0x284/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: 92 0f 83 0e 04 00 00 49 bc 00 00 00 00 00 fc ff df 84 c0 0f 85 03 04 00 00 45 39 e8 0f 84 07 04 00 00 4a 8d 14 ad a4 31 8f 91 <45> 29 e8 4e 8d 24 82 49 83 c4 fc 49 89 d5 4c 39 e2 0f 86 22 02 00
RSP: 0018:ffffc9000b08f948 EFLAGS: 00000202
RAX: ffffffff92138300 RBX: dffffc0000000000 RCX: 8000000000000000
RDX: ffffffff9194a0f8 RSI: ffffffff921383ce RDI: ffffffff8c6e1720
RBP: ffffffff816ed8c2 R08: 0000000000015bd6 R09: 0000000000000000
R10: ffffc9000b08fa98 R11: fffff52001611f55 R12: dffffc0000000000
R13: 0000000000015bd5 R14: ffffc9000b08fa48 R15: 0000000000006ed8
__unwind_start+0x514/0x660 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
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:351 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:377
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]
kmem_cache_alloc_noprof+0x2b4/0x600 mm/slub.c:5010
alloc_filename fs/namei.c:147 [inline]
do_getname+0x2e/0x250 fs/namei.c:187
getname_flags fs/namei.c:230 [inline]
getname include/linux/fs.h:2562 [inline]
class_filename_constructor include/linux/fs.h:2589 [inline]
__do_sys_symlinkat fs/namei.c:5848 [inline]
__se_sys_symlinkat+0x3d/0x2b0 fs/namei.c:5844
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: 0033:0x7fa37359e617
RSP: 002b:00007ffe6a9eaaf8 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa37359e617
RDX: 00007fa373637b0c RSI: 00000000ffffff9c RDI: 00007ffe6a9eab90
RBP: 00007ffe6a9eab3c R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000000e3
R13: 00000000000927c0 R14: 0000000000093496 R15: 00007ffe6a9eab90
rcu: rcu_preempt kthread starved for 533 jiffies! g115349 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:27496 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5294 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x3b/0xb0 kernel/rcu/tree.c:753
Code: e8 6a a3 47 0a 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 a7 75 8e 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 fb 8c 8c 00 48 c7 c3 98 8d 9c 94 49 03 1e 48 89
RSP: 0018:ffffc9000354f5c0 EFLAGS: 00000246
RAX: 1ffffffff1ceb4fa RBX: 0000000000000000 RCX: 8000000000000001
RDX: ffffc9000354f601 RSI: ffffffff8c6e1760 RDI: ffffffff8c6e1720
RBP: 1ffffffff2447601 R08: ffffc9000354f930 R09: 0000000000000000
R10: ffffc9000354f6d8 R11: fffff520006a9edd R12: ffffc90003548000
R13: ffffffff8178699f R14: ffffffff8e75a7d0 R15: dffffc0000000000
FS: 00007f94942ec780(0000) GS:ffff888123a6b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5bec23ab60 CR3: 000000007ad42000 CR4: 00000000003526f0
Call Trace:
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]
__kmalloc_cache_noprof+0x29a/0x600 mm/slub.c:5559
_kmalloc_noprof include/linux/slab.h:991 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
ref_tracker_alloc+0x221/0x530 lib/ref_tracker.c:270
__netns_tracker_alloc include/net/net_namespace.h:375 [inline]
netns_tracker_alloc include/net/net_namespace.h:384 [inline]
get_net_track+0x16e/0x230 include/net/net_namespace.h:401
sk_alloc+0x1da/0x390 net/core/sock.c:2354
unix_create1+0xb0/0x7c0 net/unix/af_unix.c:-1
unix_create+0x14c/0x1d0 net/unix/af_unix.c:1178
__sock_create+0x4b5/0xac0 net/socket.c:1679
sock_create net/socket.c:1737 [inline]
__sys_socketpair+0x127/0x5e0 net/socket.c:1873
__do_sys_socketpair net/socket.c:1936 [inline]
__se_sys_socketpair net/socket.c:1933 [inline]
__x64_sys_socketpair+0x9b/0xb0 net/socket.c:1933
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: 0033:0x7f94943f173a
Code: 48 8b 0d c1 e6 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 35 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8e e6 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffeebcadd48 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 000056328663d830 RCX: 00007f94943f173a
RDX: 0000000000000000 RSI: 0000000000080805 RDI: 0000000000000001
RBP: 00007ffeebcce170 R08: 0000000000000000 R09: 0000000000000001
R10: 00007ffeebcadd60 R11: 0000000000000246 R12: 00007ffeebcadd60
R13: 0000000000000001 R14: 0000000000000000 R15: 0000563271355ac0