bridge0: received packet on bridge_slave_0 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): P27300/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=205761, q=3870 ncpus=2)
task:syz.2.6621 state:R running task stack:20856 pid:27300 tgid:27300 ppid:24764 task_flags:0x400640 flags:0x07080000
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7552
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x19ef/0x2550 arch/x86/kernel/unwind_orc.c:693
Code: 48 bb 00 00 00 00 00 fc ff df 48 8b 44 24 10 0f b6 04 18 84 c0 0f 85 7b 08 00 00 40 b5 01 8b 44 24 5c 41 39 06 4c 8b 6c 24 50 <0f> 85 63 01 00 00 48 8b 44 24 38 80 3c 18 00 74 09 49 8d 7e 38 e8
RSP: 0018:ffffc9000c39df40 EFLAGS: 00000246
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000001
RDX: ffffc9000c39e028 RSI: dffffc0000000000 RDI: ffffc9000c39f390
RBP: 1ffffffff21ac701 R08: ffffc9000c39f390 R09: 0000000000000000
R10: ffffc9000c39e038 R11: fffff52001873c09 R12: dffffc0000000000
R13: ffffffff8176b47f R14: ffffc9000c39dfe8 R15: ffffc9000c39e030
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:165
__set_page_owner+0x8d/0x4c0 mm/page_owner.c:341
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
prep_new_page mm/page_alloc.c:1861 [inline]
get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
alloc_pages_mpol+0x212/0x380 mm/mempolicy.c:2490
folio_alloc_mpol_noprof+0x39/0x160 mm/mempolicy.c:2509
shmem_alloc_folio mm/shmem.c:1931 [inline]
shmem_alloc_and_add_folio+0x43e/0xf60 mm/shmem.c:1973
shmem_get_folio_gfp+0x5b2/0x16c0 mm/shmem.c:2562
shmem_get_folio mm/shmem.c:2668 [inline]
shmem_write_begin+0x16c/0x330 mm/shmem.c:3302
generic_perform_write+0x2d5/0x8f0 mm/filemap.c:4336
shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3477
__kernel_write_iter+0x44a/0x8f0 fs/read_write.c:621
dump_emit_page fs/coredump.c:1298 [inline]
dump_user_range+0xc19/0x12c0 fs/coredump.c:1372
elf_core_dump+0x3485/0x3a90 fs/binfmt_elf.c:2109
coredump_write+0x1290/0x1960 fs/coredump.c:1052
do_coredump fs/coredump.c:1131 [inline]
vfs_coredump+0x3744/0x4510 fs/coredump.c:1200
get_signal+0x1094/0x12c0 kernel/signal.c:3023
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x129e15e9e76d5f5c
RSP: 002b:00007f7f1a903f58 EFLAGS: 00000346 ORIG_RAX: d559c5e6d9f5d103
RAX: 0efb44ebbb893e45 RBX: d192d6fd2fda30b6 RCX: 2ee5ae63ee27d572
RDX: 1ec4059704e4f2eb RSI: 4621517a7d0190ad RDI: a6b4201b94267228
RBP: 7f6d8c7b3c10ee01 R08: 5bb0786ed0ffa74d R09: 9879dfba05258508
R10: 4eb4d6ec74ccbc7f R11: ea84849b5312923e R12: c1419e712948e8ef
R13: a8f9a6d797c04e53 R14: 91c0aaee3c02441a R15: f9254e7391a522a5
rcu: rcu_preempt kthread starved for 4676 jiffies! g205761 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28072 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
__schedule_loop kernel/sched/core.c:7307 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7322
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
kthread+0x388/0x470 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5369 Comm: crond Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:preempt_count_add+0x4/0x190 kernel/sched/core.c:5966
Code: 00 e8 70 b6 9d 00 e9 70 ff ff ff e9 d3 fe ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <41> 57 41 56 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 00 c5 42 9a
RSP: 0018:ffffc900034df770 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000292 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8c28c780 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff902ff2f7 R09: 1ffffffff205fe5e
R10: dffffc0000000000 R11: fffffbfff205fe5f R12: 0000000000000001
R13: ffff888054aaa000 R14: ffffffff9a6ff710 R15: 0000000000000000
FS: 00007f086e9e0c80(0000) GS:ffff8881253aa000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa9b01fffa0 CR3: 0000000032d94000 CR4: 00000000003526f0
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:131 [inline]
_raw_spin_lock_irqsave+0x24/0x60 kernel/locking/spinlock.c:166
__debug_check_no_obj_freed lib/debugobjects.c:1143 [inline]
debug_check_no_obj_freed+0xa4/0x530 lib/debugobjects.c:1184
__free_pages_prepare mm/page_alloc.c:1404 [inline]
__free_frozen_pages+0x5a1/0xd20 mm/page_alloc.c:2938
__slab_free+0x274/0x2c0 mm/slub.c:5613
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:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4570 [inline]
slab_alloc_node mm/slub.c:4899 [inline]
kmem_cache_alloc_noprof+0x2b8/0x650 mm/slub.c:4906
alloc_empty_file+0x5b/0x1d0 fs/file_table.c:262
path_openat+0x8f/0x3830 fs/namei.c:4845
do_file_open+0x23e/0x4a0 fs/namei.c:4888
do_sys_openat2+0x115/0x200 fs/open.c:1395
do_sys_open fs/open.c:1401 [inline]
__do_sys_openat fs/open.c:1417 [inline]
__se_sys_openat fs/open.c:1412 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1412
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f086eb9ec3a
Code: 41 89 f2 48 89 54 24 e0 41 83 e2 40 75 2a 89 f0 f7 d0 a9 00 00 41 00 74 1f 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 2e c3 0f 1f 44 00 00 48 8d 44 24 08 c7 44 24
RSP: 002b:00007ffca2f52628 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000056422555a2a0 RCX: 00007f086eb9ec3a
RDX: 0000000000080000 RSI: 00007f086ec3b45a RDI: 00000000ffffff9c
RBP: 0000000000000008 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000206 R12: 00007f086ec397f4
R13: 00007f086ec397f4 R14: 0000000000000001 R15: 000000000000002c
net_ratelimit: 15848 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:62:d1:a4:00:9b:a4, 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 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: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 veth0_to_bridge with own address as source address (addr:62:d1:a4:00:9b:a4, 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 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)
ip6_tunnel: ip6tnl2 xmit: Local address not yet configured!
net_ratelimit: 19528 callbacks suppressed
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 veth0_to_bridge with own address as source address (addr:62:d1:a4:00:9b:a4, 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 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: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 veth0_to_bridge with own address as source address (addr:62:d1:a4:00:9b:a4, 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 veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)