INFO: task kworker/u4:0:8 blocked for more than 143 seconds.
Not tainted 5.15.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0 state:D stack:24992 pid: 8 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb44/0x5960 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
wg_netns_pre_exit+0x15/0x190 drivers/net/wireguard/device.c:402
ops_pre_exit_list net/core/net_namespace.c:158 [inline]
cleanup_net+0x451/0xb00 net/core/net_namespace.c:581
process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.4:9113 blocked for more than 143 seconds.
Not tainted 5.15.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28208 pid: 9113 ppid: 6680 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb44/0x5960 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
ppp_create_interface drivers/net/ppp/ppp_generic.c:3323 [inline]
ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1037 [inline]
ppp_ioctl+0x1876/0x2d50 drivers/net/ppp/ppp_generic.c:710
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7faac3ed7a39
RSP: 002b:00007faac144d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007faac3fdaf60 RCX: 00007faac3ed7a39
RDX: 0000000020000040 RSI: 00000000c004743e RDI: 0000000000000003
RBP: 00007faac3f31c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe6f96bc6f R14: 00007faac144d300 R15: 0000000000022000
INFO: task syz-executor.4:9116 blocked for more than 143 seconds.
Not tainted 5.15.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29616 pid: 9116 ppid: 6680 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb44/0x5960 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common kernel/locking/mutex.c:669 [inline]
__mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
ppp_ioctl+0x8d/0x2d50 drivers/net/ppp/ppp_generic.c:706
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7faac3ed7a39
RSP: 002b:00007faac142c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007faac3fdb020 RCX: 00007faac3ed7a39
RDX: 0000000020000080 RSI: 000000004010744d RDI: 0000000000000003
RBP: 00007faac3f31c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe6f96bc6f R14: 00007faac142c300 R15: 0000000000022000
Showing all locks held in the system:
3 locks held by kworker/0:1/7:
#0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
#0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
#0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268
#1: ffffc90000cc7db0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272
#2: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x83/0xe10 net/wireless/reg.c:2423
4 locks held by kworker/u4:0/8:
#0: ffff888015bda938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888015bda938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888015bda938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888015bda938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
#0: ffff888015bda938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
#0: ffff888015bda938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268
#1: ffffc90000cd7db0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272
#2: ffffffff8d0d5750 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb00 net/core/net_namespace.c:555
#3: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x15/0x190 drivers/net/wireguard/device.c:402
1 lock held by khungtaskd/26:
#0: ffffffff8b981ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
3 locks held by kworker/1:1/37:
#0: ffff8880251da538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880251da538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880251da538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff8880251da538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
#0: ffff8880251da538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
#0: ffff8880251da538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268
#1: ffffc900010dfdb0 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272
#2: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4590
1 lock held by in:imklog/6241:
1 lock held by syz-executor.3/9042:
#0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5569
2 locks held by syz-executor.4/9113:
#0: ffffffff8c6b4e68 (ppp_mutex){+.+.}-{3:3}, at: ppp_ioctl+0x8d/0x2d50 drivers/net/ppp/ppp_generic.c:706
#1: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: ppp_create_interface drivers/net/ppp/ppp_generic.c:3323 [inline]
#1: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1037 [inline]
#1: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: ppp_ioctl+0x1876/0x2d50 drivers/net/ppp/ppp_generic.c:710
1 lock held by syz-executor.4/9116:
#0: ffffffff8c6b4e68 (ppp_mutex){+.+.}-{3:3}, at: ppp_ioctl+0x8d/0x2d50 drivers/net/ppp/ppp_generic.c:706
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 154 Comm: kworker/u4:2 Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5627 [inline]
RIP: 0010:lock_acquire+0x1c8/0x510 kernel/locking/lockdep.c:5590
Code: 41 0f 94 c1 45 0f b6 c9 e8 d5 96 ff ff 48 c7 c7 a0 ff 8b 89 48 83 c4 20 e8 95 02 dc 07 b8 ff ff ff ff 65 0f c1 05 48 ba a5 7e <83> f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83
RSP: 0018:ffffc9000197f9a8 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 1ffff9200032ff37 RCX: ffffffff815bed1f
RDX: 1ffff11002f8a4d3 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fd0c9f7
R10: fffffbfff1fa193e R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88801d30dc68 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6eca930010 CR3: 00000000251fd000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_write_seqcount_begin_nested include/linux/seqlock.h:520 [inline]
do_write_seqcount_begin include/linux/seqlock.h:545 [inline]
vtime_task_switch_generic+0xb5/0x5a0 kernel/sched/cputime.c:768
vtime_task_switch include/linux/vtime.h:95 [inline]
finish_task_switch.isra.0+0x6cf/0xb80 kernel/sched/core.c:4808
context_switch kernel/sched/core.c:4943 [inline]
__schedule+0xb4c/0x5960 kernel/sched/core.c:6287
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6459
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
_raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202
process_one_work+0x8b5/0x16b0 kernel/workqueue.c:2270
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 41 0f 94 c1 sete %r9b
4: 45 0f b6 c9 movzbl %r9b,%r9d
8: e8 d5 96 ff ff callq 0xffff96e2
d: 48 c7 c7 a0 ff 8b 89 mov $0xffffffff898bffa0,%rdi
14: 48 83 c4 20 add $0x20,%rsp
18: e8 95 02 dc 07 callq 0x7dc02b2
1d: b8 ff ff ff ff mov $0xffffffff,%eax
22: 65 0f c1 05 48 ba a5 xadd %eax,%gs:0x7ea5ba48(%rip) # 0x7ea5ba72
29: 7e
* 2a: 83 f8 01 cmp $0x1,%eax <-- trapping instruction
2d: 0f 85 b4 02 00 00 jne 0x2e7
33: 9c pushfq
34: 58 pop %rax
35: f6 c4 02 test $0x2,%ah
38: 0f 85 9f 02 00 00 jne 0x2dd
3e: 48 rex.W
3f: 83 .byte 0x83