INFO: task kworker/0:2:924 blocked for more than 143 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2 state:D stack:24176 pid: 924 ppid: 2 flags:0x00004000
Workqueue: events linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0x971/0x10e0 kernel/sched/core.c:6296
schedule+0x12b/0x1f0 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:673
__mutex_lock kernel/locking/mutex.c:733 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785
linkwatch_event+0xa/0x50 net/core/link_watch.c:262
process_one_work+0x850/0x1130 kernel/workqueue.c:2307
worker_thread+0xab1/0x1300 kernel/workqueue.c:2454
kthread+0x2a3/0x2d0 kernel/kthread.c:359
ret_from_fork+0x1f/0x30
INFO: task dhcpcd:3181 blocked for more than 143 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd state:D stack:20496 pid: 3181 ppid: 3180 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0x971/0x10e0 kernel/sched/core.c:6296
schedule+0x12b/0x1f0 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:673
__mutex_lock kernel/locking/mutex.c:733 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785
devinet_ioctl+0x22c/0x1d10 net/ipv4/devinet.c:1068
inet_ioctl+0x32d/0x400 net/ipv4/af_inet.c:969
sock_do_ioctl+0x14e/0x340 net/socket.c:1122
sock_ioctl+0x4a7/0x770 net/socket.c:1239
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9df1eb20e7
RSP: 002b:00007fffeae59378 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9df1dc46c8 RCX: 00007f9df1eb20e7
RDX: 00007fffeae69568 RSI: 0000000000008914 RDI: 0000000000000017
RBP: 00007fffeae79718 R08: 00007fffeae69528 R09: 00007fffeae694d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffeae69568 R14: 0000000000000028 R15: 0000000000008914
INFO: task kworker/1:4:32150 blocked for more than 143 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4 state:D stack:22456 pid:32150 ppid: 2 flags:0x00004000
Workqueue: events switchdev_deferred_process_work
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0x971/0x10e0 kernel/sched/core.c:6296
schedule+0x12b/0x1f0 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:673
__mutex_lock kernel/locking/mutex.c:733 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785
switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:75
process_one_work+0x850/0x1130 kernel/workqueue.c:2307
worker_thread+0xab1/0x1300 kernel/workqueue.c:2454
kthread+0x2a3/0x2d0 kernel/kthread.c:359
ret_from_fork+0x1f/0x30
INFO: task syz-executor.4:13966 blocked for more than 144 seconds.
Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:24464 pid:13966 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0x971/0x10e0 kernel/sched/core.c:6296
schedule+0x12b/0x1f0 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:673
__mutex_lock kernel/locking/mutex.c:733 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x92d/0xec0 net/core/rtnetlink.c:5589
netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2494
netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
netlink_unicast+0x81a/0x9f0 net/netlink/af_netlink.c:1343
netlink_sendmsg+0xaec/0xe60 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg net/socket.c:725 [inline]
__sys_sendto+0x42e/0x5b0 net/socket.c:2040
__do_sys_sendto net/socket.c:2052 [inline]
__se_sys_sendto net/socket.c:2048 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2048
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7feeb142adac
RSP: 002b:00007ffe4d225720 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007feeb24c3320 RCX: 00007feeb142adac
RDX: 0000000000000028 RSI: 00007feeb24c3370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe4d225774 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007feeb24c3370 R14: 0000000000000003 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1f320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/0:2/924:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7c7/0x1130
#1: ffffc90004247d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x805/0x1130 kernel/workqueue.c:2282
#2: ffffffff8db9b5c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:262
1 lock held by dhcpcd/3181:
#0: ffffffff8db9b5c8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x22c/0x1d10 net/ipv4/devinet.c:1068
2 locks held by getty/3281:
#0: ffff88814b04c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2077
3 locks held by kworker/0:6/3687:
#0: ffff888023abb138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7c7/0x1130
#1: ffffc90002b8fd20 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x805/0x1130 kernel/workqueue.c:2282
#2: ffffffff8db9b5c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4595
5 locks held by kworker/u4:16/28144:
#0: ffff8881445c3138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7c7/0x1130
#1: ffffc9000cf57d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x805/0x1130 kernel/workqueue.c:2282
#2: ffffffff8db8f630 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:557
#3: ffffffff8db9b5c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:10892 [inline]
#3: ffffffff8db9b5c8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x189/0x4b0 net/core/dev.c:10930
#4: ffffffff8cb24230 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x9c/0x550 kernel/rcu/tree.c:4026
2 locks held by kworker/u4:19/31934:
3 locks held by kworker/1:4/32150:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7c7/0x1130
#1: ffffc900045b7d20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x805/0x1130 kernel/workqueue.c:2282
#2: ffffffff8db9b5c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:75
1 lock held by syz-executor.4/13966:
#0: ffffffff8db9b5c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8db9b5c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x92d/0xec0 net/core/rtnetlink.c:5589
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x2a3/0x2d0 kernel/kthread.c:359
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8169 Comm: kworker/1:2 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4723 [inline]
RIP: 0010:__lock_acquire+0x8c6/0x2b00 kernel/locking/lockdep.c:4977
Code: 0f b6 e4 44 0f 42 e0 49 ff c6 48 8b 44 24 48 0f b6 04 30 84 c0 0f 85 bf 00 00 00 48 8b 44 24 28 48 63 00 49 83 c7 28 41 ff c5 <49> 39 c6 0f 8c 11 ff ff ff e9 4c 01 00 00 e8 57 44 a8 02 85 c0 74
RSP: 0018:ffffc9000518f6c0 EFLAGS: 00000002
RAX: 0000000000000004 RBX: ffffffff8f97b478 RCX: 0000000000000001
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffffffff8ffdb008
RBP: ffffc9000518f810 R08: dffffc0000000000 R09: fffffbfff1ffb602
R10: fffffbfff1ffb602 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000004 R14: 0000000000000004 R15: ffff888024464520
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0092f8a08 CR3: 00000000246b5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5639
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
_extract_crng+0xf4/0x1a0 drivers/char/random.c:1035
extract_crng drivers/char/random.c:1044 [inline]
_get_random_bytes+0x1c3/0x230 drivers/char/random.c:1551
eth_random_addr include/linux/etherdevice.h:232 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:752 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline]
nsim_dev_trap_report_work+0x31b/0xaf0 drivers/net/netdevsim/dev.c:843
process_one_work+0x850/0x1130 kernel/workqueue.c:2307
worker_thread+0xab1/0x1300 kernel/workqueue.c:2454
kthread+0x2a3/0x2d0 kernel/kthread.c:359
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 0f b6 e4 movzbl %ah,%esp
3: 44 0f 42 e0 cmovb %eax,%r12d
7: 49 ff c6 inc %r14
a: 48 8b 44 24 48 mov 0x48(%rsp),%rax
f: 0f b6 04 30 movzbl (%rax,%rsi,1),%eax
13: 84 c0 test %al,%al
15: 0f 85 bf 00 00 00 jne 0xda
1b: 48 8b 44 24 28 mov 0x28(%rsp),%rax
20: 48 63 00 movslq (%rax),%rax
23: 49 83 c7 28 add $0x28,%r15
27: 41 ff c5 inc %r13d
* 2a: 49 39 c6 cmp %rax,%r14 <-- trapping instruction
2d: 0f 8c 11 ff ff ff jl 0xffffff44
33: e9 4c 01 00 00 jmpq 0x184
38: e8 57 44 a8 02 callq 0x2a84494
3d: 85 c0 test %eax,%eax
3f: 74 .byte 0x74