INFO: task syz.2.509:1895 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-g1ccb219f8cda #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.509 state:D stack:0 pid:1895 tgid:1895 ppid:291 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7903
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x836/0x1b60 kernel/locking/mutex.c:786
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1117
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
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+0x1fe/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e0/0x250 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: 0033:0x7f4446fc11e5
RSP: 002b:00007f4447df9f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f44471b5fa0 RCX: 00007f4446fc11e5
RDX: 00007f4447df9fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f4447010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f44471b5fa0 R15: 00007ffc535a2f38
INFO: task syz.2.651:2287 blocked for more than 127 seconds.
Not tainted 6.12.30-syzkaller-g1ccb219f8cda #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.651 state:D stack:0 pid:2287 tgid:2287 ppid:291 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7903
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x836/0x1b60 kernel/locking/mutex.c:786
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1117
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
rcu_barrier+0x4d/0x530 kernel/rcu/tree.c:4574
netdev_run_todo+0x10e/0xcb0 net/core/dev.c:10864
rtnl_unlock+0x12/0x20 net/core/rtnetlink.c:152
unregister_netdev+0x156/0x1c0 net/core/dev.c:11566
unregister_candev+0x19/0x30 drivers/net/can/dev/dev.c:576
slcan_close+0x82/0x150 drivers/net/can/slcan/slcan-core.c:866
tty_ldisc_close drivers/tty/tty_ldisc.c:455 [inline]
tty_ldisc_kill drivers/tty/tty_ldisc.c:613 [inline]
tty_ldisc_release+0x2ad/0x600 drivers/tty/tty_ldisc.c:781
tty_release_struct+0x2d/0xe0 drivers/tty/tty_io.c:1690
tty_release+0xc0a/0x1230 drivers/tty/tty_io.c:1861
__fput+0x1fe/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e0/0x250 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: 0033:0x7f4446f8e929
RSP: 002b:00007ffc535a3098 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000055c9d RCX: 00007f4446f8e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f44471b7ba0 R08: 0000000000000001 R09: 0000001e535a338f
R10: 00007f4446e00000 R11: 0000000000000246 R12: 00007f44471b5fac
R13: 00007f44471b5fa0 R14: ffffffffffffffff R15: 00007ffc535a31b0
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g1ccb219f8cda #0 7a2e1ed1be67dd4e5f42c8044c2ea2ca0199c2ac
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:229 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:385
kthread+0x2ca/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: 278 Comm: sshd-session Not tainted 6.12.30-syzkaller-g1ccb219f8cda #0 7a2e1ed1be67dd4e5f42c8044c2ea2ca0199c2ac
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ip6_pol_route+0x3b3/0x12c0 net/ipv6/route.c:-1
Code: 00 00 fc ff df 4c 8b 64 24 20 e9 00 ff ff ff e8 23 af a6 fc 48 8b 5c 24 28 e9 2b 05 00 00 e8 14 af a6 fc eb 05 e8 0d af a6 fc <4c> 8b 74 24 30 49 83 c6 13 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84
RSP: 0018:ffffc90000230000 EFLAGS: 00000246
RAX: ffffffff84def2dc RBX: ffff888107bdc520 RCX: ffff88810de52600
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000230198 R08: 0000000000000000 R09: ffff888178538500
R10: ffffc900002300f0 R11: fffff52000046022 R12: ffffc900002303c8
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564f064f2b98 CR3: 0000000109fba000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip6_pol_route_input+0x5a/0x80 net/ipv6/route.c:2323
pol_lookup_func include/net/ip6_fib.h:626 [inline]
fib6_rule_lookup+0x4cc/0x6b0 net/ipv6/fib6_rules.c:117
ip6_route_input_lookup net/ipv6/route.c:2335 [inline]
ip6_route_input+0x59f/0x8d0 net/ipv6/route.c:2631
ip6_rcv_finish_core net/ipv6/ip6_input.c:66 [inline]
ip6_rcv_finish+0x15a/0x3c0 net/ipv6/ip6_input.c:77
NF_HOOK include/linux/netfilter.h:317 [inline]
ipv6_rcv+0xed/0x220 net/ipv6/ip6_input.c:309
__netif_receive_skb_one_core net/core/dev.c:5757 [inline]
__netif_receive_skb net/core/dev.c:5870 [inline]
netif_receive_skb_internal net/core/dev.c:5956 [inline]
netif_receive_skb+0x147/0x7b0 net/core/dev.c:6015
br_netif_receive_skb net/bridge/br_input.c:30 [inline]
NF_HOOK include/linux/netfilter.h:317 [inline]
br_pass_frame_up+0x126/0x1c0 net/bridge/br_input.c:70
br_handle_frame_finish+0x12d9/0x1720 net/bridge/br_input.c:221
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+0xf4b/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+0xd0/0x610 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
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
__dev_queue_xmit+0x1adb/0x3790 net/core/dev.c:4541
dev_queue_xmit include/linux/netdevice.h:3141 [inline]
neigh_hh_output include/net/neighbour.h:534 [inline]
neigh_output include/net/neighbour.h:548 [inline]
ip_finish_output2+0xbd7/0xf20 net/ipv4/ip_output.c:236
__ip_finish_output+0x17b/0x3e0 net/ipv4/ip_output.c:-1
ip_finish_output+0x35/0x360 net/ipv4/ip_output.c:324
NF_HOOK_COND include/linux/netfilter.h:306 [inline]
ip_output+0x160/0x2a0 net/ipv4/ip_output.c:434
dst_output include/net/dst.h:459 [inline]
ip_local_out net/ipv4/ip_output.c:130 [inline]
__ip_queue_xmit+0x1319/0x1cd0 net/ipv4/ip_output.c:536
ip_queue_xmit+0x51/0x70 net/ipv4/ip_output.c:550
__tcp_transmit_skb+0x235b/0x3890 net/ipv4/tcp_output.c:1477
tcp_transmit_skb net/ipv4/tcp_output.c:1495 [inline]
tcp_write_xmit+0x18e8/0x6890 net/ipv4/tcp_output.c:2838
__tcp_push_pending_frames net/ipv4/tcp_output.c:3023 [inline]
tcp_send_fin+0x739/0xf70 net/ipv4/tcp_output.c:3629
__tcp_close+0x59e/0xe90 net/ipv4/tcp.c:3151
tcp_close+0x2d/0x120 net/ipv4/tcp.c:3242
inet_release+0x1b4/0x2c0 net/ipv4/af_inet.c:442
__sock_release net/socket.c:659 [inline]
sock_close+0xdd/0x280 net/socket.c:1427
__fput+0x1fe/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e0/0x250 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
__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: 0033:0x7fd3ec0f16c5
Code: Unable to access opcode bytes at 0x7fd3ec0f169b.
RSP: 002b:00007ffd3e1936d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00000000000000ff RCX: 00007fd3ec0f16c5
RDX: 00000000000000e7 RSI: fffffffffffffea0 RDI: 00000000000000ff
RBP: 0000564f064eaa10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3e193754
R13: 0000564eccd6b4e3 R14: 0000564eccd7c4f0 R15: 0000000000000117
net_ratelimit: 89962 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2a:5e:ba:5b:35:67, 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 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:2a:5e:ba:5b:35:67, 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:2a:5e:ba:5b:35:67, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)