INFO: task syz.2.1283:4049 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-gfc2476d0896a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1283 state:D stack:0 pid:4049 tgid:4048 ppid:291 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7789
__schedule_loop kernel/sched/core.c:7870 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7885
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
exit_aio+0x2df/0x3b0 fs/aio.c:927
__mmput+0x30/0x320 kernel/fork.c:1345
mmput+0x55/0x170 kernel/fork.c:1371
exit_mm kernel/exit.c:574 [inline]
do_exit+0x910/0x2630 kernel/exit.c:931
do_group_exit+0x22a/0x300 kernel/exit.c:1094
get_signal+0x139d/0x14f0 kernel/signal.c:2934
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fcc31f8e9a9
RSP: 002b:00007fcc32d9d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fcc321b5fa8 RCX: 00007fcc31f8e9a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcc321b5fa8
RBP: 00007fcc321b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc321b5fac
R13: 0000000000000000 R14: 00007ffc1320b600 R15: 00007ffc1320b6e8
INFO: task syz.5.1332:4194 blocked for more than 126 seconds.
Not tainted 6.12.30-syzkaller-gfc2476d0896a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1332 state:D stack:0 pid:4194 tgid:4194 ppid:852 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7789
__schedule_loop kernel/sched/core.c:7870 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7885
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
exit_aio+0x2df/0x3b0 fs/aio.c:927
__mmput+0x30/0x320 kernel/fork.c:1345
mmput+0x55/0x170 kernel/fork.c:1371
exit_mm kernel/exit.c:574 [inline]
do_exit+0x910/0x2630 kernel/exit.c:931
do_group_exit+0x22a/0x300 kernel/exit.c:1094
__do_sys_exit_group kernel/exit.c:1105 [inline]
__se_sys_exit_group kernel/exit.c:1103 [inline]
__x64_sys_exit_group+0x43/0x50 kernel/exit.c:1103
x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fa890f8e9a9
RSP: 002b:00007ffe7a90f638 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa890f8e9a9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe7a90f69c R08: 0000000c7a90f72f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000109
R13: 00000000000927c0 R14: 0000000000014f87 R15: 00007ffe7a90f6f0
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-gfc2476d0896a #0 e1e9364838a23ddd1cd40ddd4d9250930b5d8506
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:423
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 4252 Comm: kworker/1:6 Not tainted 6.12.30-syzkaller-gfc2476d0896a #0 e1e9364838a23ddd1cd40ddd4d9250930b5d8506
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: mld mld_query_work
RIP: 0010:task_stack_page include/linux/sched/task_stack.h:23 [inline]
RIP: 0010:last_frame arch/x86/kernel/unwind_frame.c:82 [inline]
RIP: 0010:is_last_frame arch/x86/kernel/unwind_frame.c:87 [inline]
RIP: 0010:is_last_task_frame arch/x86/kernel/unwind_frame.c:156 [inline]
RIP: 0010:unwind_next_frame+0xfe/0x750 arch/x86/kernel/unwind_frame.c:276
Code: c1 e8 03 48 89 45 a0 80 3c 10 00 74 12 4c 89 f7 e8 97 b7 97 00 48 ba 00 00 00 00 00 fc ff df 4c 89 75 98 49 8b 06 48 89 45 a8 <4c> 8d 68 20 4c 89 e8 48 c1 e8 03 80 3c 10 00 74 12 4c 89 ef e8 69
RSP: 0018:ffffc9000022fc28 EFLAGS: 00000246
RAX: ffff8881277d4c00 RBX: ffffc9000022fca8 RCX: 000000000022fc00
RDX: dffffc0000000000 RSI: ffffffff81db9e60 RDI: ffffc9000022fca8
RBP: ffffc9000022fc98 R08: ffffc9000022fd70 R09: ffffc9000022fd68
R10: 0000000000000001 R11: ffffffff81740970 R12: 0000000000000000
R13: 1ffff92000045fa0 R14: ffffc9000022fcd0 R15: ffffc90000230010
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd16efb2060 CR3: 0000000120594000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x139/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9d/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x73/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4164 [inline]
slab_alloc_node mm/slub.c:4213 [inline]
kmem_cache_alloc_noprof+0x131/0x3a0 mm/slub.c:4222
skb_clone+0x229/0x460 net/core/skbuff.c:2094
dev_queue_xmit_nit+0x1ad/0xae0 net/core/dev.c:2386
xmit_one net/core/dev.c:3655 [inline]
dev_hard_start_xmit+0x187/0x770 net/core/dev.c:3678
__dev_queue_xmit+0x19cc/0x3790 net/core/dev.c:4514
dev_queue_xmit include/linux/netdevice.h:3141 [inline]
br_dev_queue_push_xmit+0x553/0x6d0 net/bridge/br_forward.c:53
NF_HOOK include/linux/netfilter.h:317 [inline]
br_forward_finish net/bridge/br_forward.c:66 [inline]
NF_HOOK include/linux/netfilter.h:317 [inline]
__br_forward+0x25c/0x390 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver net/bridge/br_forward.c:190 [inline]
br_flood+0x50e/0x730 net/bridge/br_forward.c:236
br_handle_frame_finish+0x12bb/0x1720 net/bridge/br_input.c:215
nf_hook_bridge_pre net/bridge/br_input.c:301 [inline]
br_handle_frame+0x5a6/0xba0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xf48/0x3940 net/core/dev.c:5651
__netif_receive_skb_one_core net/core/dev.c:5755 [inline]
__netif_receive_skb net/core/dev.c:5870 [inline]
process_backlog+0x3e5/0xae0 net/core/dev.c:6202
__napi_poll+0xd3/0x610 net/core/dev.c:6853
napi_poll net/core/dev.c:6922 [inline]
net_rx_action+0x584/0xce0 net/core/dev.c:7044
handle_softirqs+0x1ae/0x630 kernel/softirq.c:603
__do_softirq+0xf/0x16 kernel/softirq.c:641
do_softirq+0xa6/0x100 kernel/softirq.c:485
__local_bh_enable_ip+0x74/0x80 kernel/softirq.c:412
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
_raw_spin_unlock_bh+0x54/0x60 kernel/locking/spinlock.c:210
spin_unlock_bh include/linux/spinlock.h:396 [inline]
mld_query_work+0x951/0x2c10 net/ipv6/mcast.c:1529
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d5/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
net_ratelimit: 73403 callbacks suppressed
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:86:3c:15:17:d0:76, 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 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 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 veth0_to_bridge with own address as source address (addr:86:3c:15:17:d0:76, 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)