bridge0: received packet on veth0_to_bridge 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): P6959/1:b..l P5768/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=17593, q=303 ncpus=2)
task:syz-executor state:R running task stack:20688 pid:5768 ppid:5765 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_pte_range mm/memory.c:1107 [inline]
copy_pmd_range mm/memory.c:1168 [inline]
copy_pud_range mm/memory.c:1205 [inline]
copy_p4d_range mm/memory.c:1229 [inline]
copy_page_range+0x2ba0/0x3670 mm/memory.c:1323
dup_mmap kernel/fork.c:764 [inline]
dup_mm kernel/fork.c:1692 [inline]
copy_mm+0x11cb/0x1d50 kernel/fork.c:1741
copy_process+0x16f7/0x3d80 kernel/fork.c:2506
kernel_clone+0x24b/0x8a0 kernel/fork.c:2914
__do_sys_clone kernel/fork.c:3057 [inline]
__se_sys_clone kernel/fork.c:3041 [inline]
__x64_sys_clone+0x1b7/0x230 kernel/fork.c:3041
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0a11fc3752
RSP: 002b:00007ffc45ad25d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc45ad25d0 RCX: 00007f0a11fc3752
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc45ad275c R08: 0000000000000000 R09: 0000000000000001
R10: 00005555949897d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000000245b0 R15: 00007ffc45ad27b0
task:syz.2.391 state:R running task stack:27016 pid:6959 ppid:5777 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1523 [inline]
zap_pmd_range mm/memory.c:1571 [inline]
zap_pud_range mm/memory.c:1600 [inline]
zap_p4d_range mm/memory.c:1621 [inline]
unmap_page_range+0x2315/0x3000 mm/memory.c:1642
unmap_vmas+0x286/0x3f0 mm/memory.c:1732
exit_mmap+0x238/0xb90 mm/mmap.c:3302
__mmput+0x118/0x3c0 kernel/fork.c:1355
exit_mm+0x1f2/0x2c0 kernel/exit.c:569
do_exit+0x8dd/0x2460 kernel/exit.c:870
do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
get_signal+0x12fc/0x13f0 kernel/signal.c:2902
arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3cea59acb9
RSP: 002b:00007fffbc9e7888 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 0000000000024b5f RCX: 00007f3cea59acb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3cea815fac
RBP: 0000000000000032 R08: 0000000000745d1e R09: 0000000000000000
R10: 00007fffbc9e7990 R11: 0000000000000246 R12: 00007fffbc9e79b0
R13: 00007f3cea815fac R14: 0000000000024b91 R15: 00007fffbc9e7990
rcu: rcu_preempt kthread starved for 9248 jiffies! g17593 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:26728 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 6957 Comm: syz.0.390 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:filter_irq_stacks+0x26/0x90 kernel/stacktrace.c:395
Code: 0f 1f 40 00 f3 0f 1e fa 41 57 41 56 41 55 41 54 53 85 f6 74 70 49 89 fe 41 89 f4 31 db 49 bd 00 00 00 00 00 fc ff df 49 89 ff <4c> 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 74 75 69 00
RSP: 0018:ffffc90000007538 EFLAGS: 00000212
RAX: ffffffff887b7501 RBX: 000000000000000a RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000026 RDI: ffffc900000075c0
RBP: 0000000000000000 R08: ffffffff8e8ad9ef R09: 1ffffffff1d15b3d
R10: dffffc0000000000 R11: fffffbfff1d15b3e R12: 0000000000000026
R13: dffffc0000000000 R14: ffffc900000075c0 R15: ffffc90000007610
FS: 00007f7898fad6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563ccc177a38 CR3: 000000002701d000 CR4: 00000000003506f0
Call Trace:
__stack_depot_save+0x1f/0x630 lib/stackdepot.c:377
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_set_track+0x5f/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x270 mm/slub.c:3852
kfree_skb include/linux/skbuff.h:1232 [inline]
ip6_mc_input+0xaa0/0xcb0 net/ipv6/ip6_input.c:589
NF_HOOK+0x32d/0x3b0 include/linux/netfilter.h:304
__netif_receive_skb_one_core net/core/dev.c:5638 [inline]
__netif_receive_skb+0xcc/0x290 net/core/dev.c:5752
process_backlog+0x396/0x700 net/core/dev.c:6080
__napi_poll+0xc0/0x460 net/core/dev.c:6642
napi_poll net/core/dev.c:6709 [inline]
net_rx_action+0x616/0xc50 net/core/dev.c:6846
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__sanitizer_cov_trace_pc+0x45/0x60 kernel/kcov.c:221
Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc9000bb57440 EFLAGS: 00000246
RAX: ffffffff845a9e74 RBX: ffff88807cd97200 RCX: ffff88802a253c00
RDX: ffffc9000f103000 RSI: 000000000000399f RDI: ffff88807cd97690
RBP: ffffc9000bb57530 R08: ffff8880b8e41ec3 R09: 1ffff110171c83d8
R10: dffffc0000000000 R11: ffffed10171c83d9 R12: ffff88807cd97690
R13: dffffc0000000000 R14: ffff88807cd97690 R15: dffffc0000000000
__percpu_counter_sum+0x24/0x1f0 lib/percpu_counter.c:138
percpu_counter_sum include/linux/percpu_counter.h:96 [inline]
check_mm kernel/fork.c:831 [inline]
__mmdrop+0x102/0x3d0 kernel/fork.c:928
mmdrop include/linux/sched/mm.h:54 [inline]
mmdrop_sched include/linux/sched/mm.h:82 [inline]
mmdrop_lazy_tlb_sched include/linux/sched/mm.h:109 [inline]
finish_task_switch+0x3dc/0x8f0 kernel/sched/core.c:5280
context_switch kernel/sched/core.c:5384 [inline]
__schedule+0x155b/0x45a0 kernel/sched/core.c:6700
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lock_is_held_type+0x152/0x190 kernel/locking/lockdep.c:5830
Code: 00 75 46 41 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e <41> 5f 5d c3 0f 0b 48 c7 c7 00 c9 ca 8a e8 3c 12 00 00 65 c7 05 39
RSP: 0018:ffffc9000bb578c8 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffff88802d0d4c00 RCX: 7f7e87ccbede4900
RDX: ffff88802a253c00 RSI: ffffffff8acada80 RDI: ffffffff8b1c80e0
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff2237ca6
R10: dffffc0000000000 R11: fffffbfff2237ca7 R12: 1ffff9200176af1c
R13: ffffc9000bb57b20 R14: 0000000000000001 R15: ffff88802a2546e0
lock_is_held include/linux/lockdep.h:288 [inline]
mmap_assert_locked include/linux/mmap_lock.h:65 [inline]
find_vma+0xb3/0x1b0 mm/mmap.c:1887
lock_mm_and_find_vma+0x5f/0x2f0 mm/memory.c:5443
do_user_addr_fault+0x36c/0x12c0 arch/x86/mm/fault.c:1345
handle_page_fault arch/x86/mm/fault.c:1465 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1521
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:rep_movs_alternative+0x13/0x90 arch/x86/lib/copy_user_64.S:43
Code: b6 48 8b 1c 24 4c 8b 64 24 08 48 83 c4 10 c3 cc cc cc cc cc cc cc cc f3 0f 1e fa 48 83 f9 40 73 40 83 f9 08 73 21 85 c9 74 0f <8a> 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 66 2e 0f 1f 84 00
RSP: 0018:ffffc9000bb57b48 EFLAGS: 00050216
RAX: ffffffff84294e01 RBX: 0000000000000020 RCX: 0000000000000020
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffc9000bb59048
RBP: 0000000000000000 R08: ffffc9000bb59067 R09: 1ffff9200176b20c
R10: dffffc0000000000 R11: fffff5200176b20d R12: 0000000000000020
R13: 0000000000000000 R14: ffffc9000bb59048 R15: 0000000000000000
copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:127 [inline]
_copy_from_user+0x8b/0xe0 lib/usercopy.c:23
copy_from_user include/linux/uaccess.h:183 [inline]
copy_from_bpfptr_offset include/linux/bpfptr.h:53 [inline]
copy_from_bpfptr+0x67/0x80 include/linux/bpfptr.h:59
bpf_prog_load+0xa80/0x1670 kernel/bpf/syscall.c:2709
__sys_bpf+0x5ba/0x890 kernel/bpf/syscall.c:5476
__do_sys_bpf kernel/bpf/syscall.c:5580 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5578 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5578
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f789819acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7898fad028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7898416090 RCX: 00007f789819acb9
RDX: 0000000000000094 RSI: 0000200000000580 RDI: 0000000000000005
RBP: 00007f7898208bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7898416128 R14: 00007f7898416090 R15: 00007ffc61c7bfa8
net_ratelimit: 571 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 veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
net_ratelimit: 374 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 bridge_slave_0 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: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)