INFO: task syz.4.1130:3767 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-ge973ddb125a8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1130 state:D stack:0 pid:3767 tgid:3767 ppid:1193 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
rcu_barrier+0x415/0x530 kernel/rcu/tree.c:4642
kvm_mmu_uninit_tdp_mmu+0x1df/0x210 arch/x86/kvm/mmu/tdp_mmu.c:51
kvm_mmu_uninit_vm+0x27/0x60 arch/x86/kvm/mmu/mmu.c:6572
kvm_arch_destroy_vm+0x383/0x410 arch/x86/kvm/x86.c:12898
kvm_destroy_vm virt/kvm/kvm_main.c:1355 [inline]
kvm_put_kvm+0xb04/0x12b0 virt/kvm/kvm_main.c:1391
kvm_vm_release+0x47/0x70 virt/kvm/kvm_main.c:1414
__fput+0x1fb/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e3/0x250 kernel/task_work.c:240
resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x64/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f926a98e929
RSP: 002b:00007ffd03711a18 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f926abb7ba0 RCX: 00007f926a98e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f926abb7ba0 R08: 0000000000000124 R09: 0000001103711d0f
R10: 00000000003ffcb8 R11: 0000000000000246 R12: 000000000001c416
R13: 00007ffd03711b10 R14: ffffffffffffffff R15: 00007ffd03711b30
INFO: task syz.4.1130:3768 blocked for more than 124 seconds.
Not tainted 6.12.30-syzkaller-ge973ddb125a8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1130 state:D stack:0 pid:3768 tgid:3767 ppid:1193 flags:0x00004006
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_preempt_disabled+0x14/0x30 kernel/sched/core.c:7942
__mutex_lock_common kernel/locking/mutex.c:707 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:803
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:285
rcu_barrier+0x4d/0x530 kernel/rcu/tree.c:4574
kvm_mmu_uninit_tdp_mmu+0x1df/0x210 arch/x86/kvm/mmu/tdp_mmu.c:51
kvm_mmu_uninit_vm+0x27/0x60 arch/x86/kvm/mmu/mmu.c:6572
kvm_arch_destroy_vm+0x383/0x410 arch/x86/kvm/x86.c:12898
kvm_destroy_vm virt/kvm/kvm_main.c:1355 [inline]
kvm_put_kvm+0xb04/0x12b0 virt/kvm/kvm_main.c:1391
kvm_vm_release+0x47/0x70 virt/kvm/kvm_main.c:1414
__fput+0x1fb/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e3/0x250 kernel/task_work.c:240
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x9b4/0x2630 kernel/exit.c:944
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: 0033:0x7f926a98e929
RSP: 002b:00007f926b7770e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f926abb5fa8 RCX: 00007f926a98e929
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f926abb5fa8
RBP: 00007f926abb5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f926abb5fac
R13: 0000000000000000 R14: 00007ffd037117d0 R15: 00007ffd037118b8
INFO: task syz.2.1132:3776 blocked for more than 126 seconds.
Not tainted 6.12.30-syzkaller-ge973ddb125a8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1132 state:D stack:0 pid:3776 tgid:3776 ppid:293 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_preempt_disabled+0x14/0x30 kernel/sched/core.c:7942
__mutex_lock_common kernel/locking/mutex.c:707 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:803
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:285
rtnl_lock+0x19/0x20 net/core/rtnetlink.c:79
packet_flush_mclist net/packet/af_packet.c:3819 [inline]
packet_release+0x47c/0xd50 net/packet/af_packet.c:3201
__sock_release net/socket.c:659 [inline]
sock_close+0xda/0x280 net/socket.c:1427
__fput+0x1fb/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e3/0x250 kernel/task_work.c:240
resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x64/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f0e2b58e929
RSP: 002b:00007ffca69d7758 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f0e2b7b7ba0 RCX: 00007f0e2b58e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f0e2b7b7ba0 R08: 0000000000000190 R09: 00000016a69d7a4f
R10: 00007f0e2b7b7ac0 R11: 0000000000000246 R12: 000000000001c951
R13: 00007f0e2b7b5fa0 R14: ffffffffffffffff R15: 00007ffca69d7870
INFO: task syz.2.1132:3778 blocked for more than 127 seconds.
Not tainted 6.12.30-syzkaller-ge973ddb125a8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1132 state:D stack:0 pid:3778 tgid:3776 ppid:293 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_preempt_disabled+0x14/0x30 kernel/sched/core.c:7942
__mutex_lock_common kernel/locking/mutex.c:707 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:803
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1134
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:285
rcu_barrier+0x4d/0x530 kernel/rcu/tree.c:4574
br_multicast_dev_del+0x5aa/0x600 net/bridge/br_multicast.c:4374
br_dev_uninit+0x20/0x40 net/bridge/br_device.c:155
unregister_netdevice_many_notify+0x155f/0x1bd0 net/core/dev.c:11507
unregister_netdevice_many net/core/dev.c:11547 [inline]
unregister_netdevice_queue+0x339/0x380 net/core/dev.c:11421
br_dev_delete+0x100/0x130 net/bridge/br_if.c:396
br_del_bridge+0xbb/0xf0 net/bridge/br_if.c:495
br_ioctl_stub+0x4d0/0x9e0 net/bridge/br_ioctl.c:-1
br_ioctl_call net/socket.c:1201 [inline]
sock_ioctl+0x403/0x7b0 net/socket.c:1301
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
__x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
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: 0033:0x7f0e2b58e929
RSP: 002b:00007f0e2c315038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0e2b7b6080 RCX: 00007f0e2b58e929
RDX: 0000200000000040 RSI: 00000000000089a1 RDI: 0000000000000004
RBP: 00007f0e2b610ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0e2b7b6080 R15: 00007ffca69d75f8
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-ge973ddb125a8 #0 f860be579a5d95fde93822abb2fabcfead990e3c
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: 30 Comm: ksoftirqd/1 Not tainted 6.12.30-syzkaller-ge973ddb125a8 #0 f860be579a5d95fde93822abb2fabcfead990e3c
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:br_dev_queue_push_xmit+0x8e/0x6d0 net/bridge/br_forward.c:36
Code: 04 f3 f3 f3 49 89 44 1d 00 e8 5e 69 8c fc 4c 89 ff be 0e 00 00 00 e8 41 f6 68 ff 49 8d 7f 10 48 89 f8 48 c1 e8 03 80 3c 18 00 <74> 05 e8 1b 64 e2 fc 49 8b 7f 10 4c 89 fe e8 7f 41 6e ff 84 c0 0f
RSP: 0018:ffffc900001f73e0 EFLAGS: 00000246
RAX: 1ffff1102d2a6542 RBX: dffffc0000000000 RCX: ffff88810367df00
RDX: 0000000000000100 RSI: 000000000000000e RDI: ffff888169532a10
RBP: ffffc900001f74b8 R08: ffff88811b38f9a3 R09: 1ffff11023671f34
R10: dffffc0000000000 R11: ffffed1023671f35 R12: 1ffff1102d2a6550
R13: 1ffff9200003ee84 R14: ffff888169532a20 R15: ffff888169532a00
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd03144e9c CR3: 00000000072a8000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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]
br_flood+0x67e/0x730 net/bridge/br_forward.c:245
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
run_ksoftirqd+0x20/0x30 kernel/softirq.c:981
smpboot_thread_fn+0x490/0x8c0 kernel/smpboot.c:164
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: 74365 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 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 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: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:0c, vlan:0)