INFO: task kworker/0:4:2934 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4 state:D stack:23664 pid: 2934 ppid: 2 flags:0x00004000
Workqueue: events linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
linkwatch_event+0xa/0x50 net/core/link_watch.c:251
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
INFO: task kworker/1:7:10085 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:7 state:D stack:24176 pid:10085 ppid: 2 flags:0x00004000
Workqueue: events switchdev_deferred_process_work
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
INFO: task syz-executor.5:31888 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:26032 pid:31888 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5568
netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2491
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x814/0x9f0 net/netlink/af_netlink.c:1345
netlink_sendmsg+0xa20/0xe40 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg net/socket.c:724 [inline]
__sys_sendto+0x42e/0x5b0 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2044
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: 0033:0x7f887a8fe8ac
RSP: 002b:00007ffd969db370 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f887b997320 RCX: 00007f887a8fe8ac
RDX: 0000000000000028 RSI: 00007f887b997370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd969db3c4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f887b997370 R14: 0000000000000003 R15: 0000000000000000
INFO: task syz-executor.1:31894 blocked for more than 144 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26864 pid:31894 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
rtnl_lock net/core/rtnetlink.c:72 [inline]
rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5568
netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2491
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x814/0x9f0 net/netlink/af_netlink.c:1345
netlink_sendmsg+0xa20/0xe40 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg net/socket.c:724 [inline]
__sys_sendto+0x42e/0x5b0 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2044
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: 0033:0x7f7aa9dc58ac
RSP: 002b:00007ffd9cf297f0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f7aaae5e320 RCX: 00007f7aa9dc58ac
RDX: 0000000000000028 RSI: 00007f7aaae5e370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd9cf29844 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f7aaae5e370 R14: 0000000000000003 R15: 0000000000000000
Showing all locks held in the system:
2 locks held by kworker/u4:0/8:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1da00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
5 locks held by kworker/u4:3/54:
#0: ffff8881447bb138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc90001a2fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db72130 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:555
#3: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:11560 [inline]
#3: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x189/0x4b0 net/core/dev.c:11598
#4: ffffffff8cb22268 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#4: ffffffff8cb22268 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x277/0x740 kernel/rcu/tree_exp.h:836
3 locks held by kworker/0:4/2934:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9000b017d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
1 lock held by in:imklog/6225:
3 locks held by kworker/0:20/9425:
#0: ffff88814ab01138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc900049efd20 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4595
3 locks held by kworker/1:7/10085:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9000360fd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
2 locks held by kworker/1:2/7996:
#0: ffff888011466538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9001a037d20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
3 locks held by kworker/0:1/28381:
#0: ffff888011465d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc900260d7d20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7a/0x800 net/wireless/reg.c:2423
1 lock held by syz-executor.5/31888:
#0: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5568
1 lock held by syz-executor.1/31894:
#0: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8db7dec8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5568
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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:105
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+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 19536 Comm: kworker/u4:2 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:mutex_lock_nested+0x0/0x20 kernel/locking/mutex.c:791
Code: c7 c1 a8 8a fe 8d 80 e1 07 80 c1 03 38 c1 7c a4 48 c7 c7 a8 8a fe 8d e8 3e 41 cc f7 eb 96 66 2e 0f 1f 84 00 00 00 00 00 66 90 <89> f2 4c 8b 04 24 be 02 00 00 00 b9 00 00 00 00 45 31 c9 6a 00 e8
RSP: 0018:ffffc9001b567b00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81ac9192
RDX: ffff888174701d00 RSI: 0000000000000000 RDI: ffffffff8cbac800
RBP: 0000000000000001 R08: ffffffff81ac91b4 R09: fffffbfff2181e01
R10: fffffbfff2181e01 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920036acf68 R14: dffffc0000000000 R15: ffffffff90c0f000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f095dbb2000 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
jump_label_lock kernel/jump_label.c:27 [inline]
static_key_disable_cpuslocked+0x99/0x1b0 kernel/jump_label.c:205
static_key_disable+0x16/0x20 kernel/jump_label.c:215
toggle_allocation_gate+0x3c8/0x460 mm/kfence/core.c:746
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: c7 c1 a8 8a fe 8d mov $0x8dfe8aa8,%ecx
6: 80 e1 07 and $0x7,%cl
9: 80 c1 03 add $0x3,%cl
c: 38 c1 cmp %al,%cl
e: 7c a4 jl 0xffffffb4
10: 48 c7 c7 a8 8a fe 8d mov $0xffffffff8dfe8aa8,%rdi
17: e8 3e 41 cc f7 callq 0xf7cc415a
1c: eb 96 jmp 0xffffffb4
1e: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
25: 00 00 00
28: 66 90 xchg %ax,%ax
* 2a: 89 f2 mov %esi,%edx <-- trapping instruction
2c: 4c 8b 04 24 mov (%rsp),%r8
30: be 02 00 00 00 mov $0x2,%esi
35: b9 00 00 00 00 mov $0x0,%ecx
3a: 45 31 c9 xor %r9d,%r9d
3d: 6a 00 pushq $0x0
3f: e8 .byte 0xe8