INFO: task kworker/1:2:304 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-g3bff0858a069 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2 state:D stack:0 pid:304 tgid:304 ppid:2 flags:0x00004000
Workqueue: events fqdir_free_fn
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
fqdir_free_fn+0x36/0x150 net/ipv4/inet_fragment.c:167
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
INFO: task syz.6.792:2743 blocked for more than 126 seconds.
Not tainted 6.12.30-syzkaller-g3bff0858a069 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.792 state:D stack:0 pid:2743 tgid:2742 ppid:2138 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
get_signal+0x1307/0x14f0 kernel/signal.c:2707
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: 0033:0x7f0e7b98e52b
RSP: 002b:00007f0e7c88c490 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f0e7c88cbe0 RCX: 00007f0e7b98e52b
RDX: 00007f0e7c88cbe0 RSI: 000000004020ae46 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000001 R09: 0000000000000052
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000017
R13: 0000200000fff000 R14: 0000200000fe8000 R15: 00000000fec00000
INFO: task syz.5.798:2764 blocked for more than 128 seconds.
Not tainted 6.12.30-syzkaller-g3bff0858a069 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.798 state:D stack:0 pid:2764 tgid:2763 ppid:1430 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
netdev_run_todo+0x10e/0xcb0 net/core/dev.c:10864
rtnl_unlock+0x12/0x20 net/core/rtnetlink.c:152
tun_detach drivers/net/tun.c:704 [inline]
tun_chr_close+0xc5/0x150 drivers/net/tun.c:3517
__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: 0033:0x7f37f338e52b
RSP: 002b:00007f37f42a6490 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f37f42a6be0 RCX: 00007f37f338e52b
RDX: 00007f37f42a6be0 RSI: 000000004020ae46 RDI: 0000000000000009
RBP: 0000000000000009 R08: 0000000000000001 R09: 0000000000000041
R10: 0000000000000009 R11: 0000000000000246 R12: 000000000000000f
R13: 0000200000ff4000 R14: 0000200000fe5000 R15: 00000000fec00000
INFO: task syz.3.801:2773 blocked for more than 129 seconds.
Not tainted 6.12.30-syzkaller-g3bff0858a069 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.801 state:D stack:0 pid:2773 tgid:2773 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_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
netdev_run_todo+0x10e/0xcb0 net/core/dev.c:10864
rtnl_unlock+0x12/0x20 net/core/rtnetlink.c:152
tun_detach drivers/net/tun.c:704 [inline]
tun_chr_close+0xc5/0x150 drivers/net/tun.c:3517
__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: 0033:0x7f75a698e929
RSP: 002b:00007ffd61d5d838 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f75a6bb7ba0 RCX: 00007f75a698e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f75a6bb7ba0 R08: 00000000000000c0 R09: 0000000c61d5db2f
R10: 00007f75a6bb7ac0 R11: 0000000000000246 R12: 000000000001a6b5
R13: 00007ffd61d5d930 R14: ffffffffffffffff R15: 00007ffd61d5d950
INFO: task syz.2.826:2835 blocked for more than 130 seconds.
Not tainted 6.12.30-syzkaller-g3bff0858a069 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.826 state:D stack:0 pid:2835 tgid:2833 ppid:288 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
netdev_run_todo+0x10e/0xcb0 net/core/dev.c:10864
rtnl_unlock+0x12/0x20 net/core/rtnetlink.c:152
setup_net+0x5d1/0x990 net/core/net_namespace.c:384
copy_net_ns+0x513/0xa30 net/core/net_namespace.c:510
create_new_namespaces+0x3b5/0x720 kernel/nsproxy.c:110
copy_namespaces+0x25d/0x2b0 kernel/nsproxy.c:179
copy_process+0x126d/0x3220 kernel/fork.c:2408
kernel_clone+0x23f/0x830 kernel/fork.c:2818
__do_sys_clone kernel/fork.c:2963 [inline]
__se_sys_clone kernel/fork.c:2947 [inline]
__x64_sys_clone+0x18c/0x1f0 kernel/fork.c:2947
x64_sys_call+0x2b3c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:57
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: 0033:0x7f06b218e929
RSP: 002b:00007f06b3035fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f06b23b6080 RCX: 00007f06b218e929
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000040802000
RBP: 00007f06b2210ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f06b23b6080 R15: 00007fff9fb0d488
INFO: task syz.2.826:2837 blocked for more than 131 seconds.
Not tainted 6.12.30-syzkaller-g3bff0858a069 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.826 state:D stack:0 pid:2837 tgid:2833 ppid:288 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
setup_net+0x8cf/0x990 net/core/net_namespace.c:394
copy_net_ns+0x513/0xa30 net/core/net_namespace.c:510
create_new_namespaces+0x3b5/0x720 kernel/nsproxy.c:110
copy_namespaces+0x25d/0x2b0 kernel/nsproxy.c:179
copy_process+0x126d/0x3220 kernel/fork.c:2408
kernel_clone+0x23f/0x830 kernel/fork.c:2818
__do_sys_clone kernel/fork.c:2963 [inline]
__se_sys_clone kernel/fork.c:2947 [inline]
__x64_sys_clone+0x18c/0x1f0 kernel/fork.c:2947
x64_sys_call+0x2b3c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:57
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: 0033:0x7f06b218e929
RSP: 002b:00007f06b3014fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f06b23b6160 RCX: 00007f06b218e929
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000040802000
RBP: 00007f06b2210ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f06b23b6160 R15: 00007fff9fb0d488
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g3bff0858a069 #0 051941c7a2def972631bf72fe68480c4884f2578
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 33 Comm: rcuop/1 Not tainted 6.12.30-syzkaller-g3bff0858a069 #0 051941c7a2def972631bf72fe68480c4884f2578
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:check_region_inline mm/kasan/generic.c:171 [inline]
RIP: 0010:kasan_check_range+0x10/0x2a0 mm/kasan/generic.c:189
Code: e9 45 7d ac 03 cc cc cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 b0 01 48 85 f6 0f 84 c4 01 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 4c 8d 04 37 49 39 f8 0f 82 68
RSP: 0018:ffffc90000007740 EFLAGS: 00000202
RAX: ffff888102f1ca01 RBX: ffff888102f1cad8 RCX: ffffffff84f9bc83
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888102f1cad8
RBP: ffffc90000007750 R08: ffff888103678000 R09: 0000000000000003
R10: 000000000000dd86 R11: 0000000000000100 R12: 0000000000000001
R13: ffff888120b13000 R14: dffffc0000000000 R15: 1ffff92000000efc
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe0de0e7d60 CR3: 000000012c04e000 CR4: 00000000003526b0
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
br_opt_get net/bridge/br_private.h:755 [inline]
br_handle_frame_finish+0x8a3/0x1720 net/bridge/br_input.c:170
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