INFO: task kworker/1:9:9320 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/1:9 state:D stack:19880 pid: 9320 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_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
addrconf_dad_work+0xdb/0x1d10 net/ipv6/addrconf.c:4052
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/0:4:10368 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:24304 pid:10368 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_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
addrconf_dad_work+0xdb/0x1d10 net/ipv6/addrconf.c:4052
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
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1d940 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by in:imklog/6217:
#0: ffff888023c64870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
3 locks held by kworker/1:9/9320:
#0: ffff88814a585538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc90005c57d20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db7ec88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xdb/0x1d10 net/ipv6/addrconf.c:4052
3 locks held by kworker/1:13/11148:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc90002c67d20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db7ec88 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
3 locks held by kworker/u4:6/7879:
#0: ffff8880b9b395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:478
#1: ffff8880b9b27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4c1/0x780 kernel/sched/psi.c:880
#2: ffff8880b9b280d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x12a/0x270 kernel/time/timer.c:946
3 locks held by kworker/1:1/29538:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc900158f7d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db7ec88 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
3 locks held by kworker/0:4/10368:
#0: ffff88814a585538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9001e43fd20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db7ec88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xdb/0x1d10 net/ipv6/addrconf.c:4052
5 locks held by kworker/u4:0/13573:
#0: ffff88814499b138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9001e30fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffffffff8db72ef0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:555
#3: ffffffff8db7ec88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:11560 [inline]
#3: ffffffff8db7ec88 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x189/0x4b0 net/core/dev.c:11598
#4: ffffffff8cb220b0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x9c/0x550 kernel/rcu/tree.c:3985
1 lock held by syz-executor.3/1230:
#0: ffffffff8db7ec88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8db7ec88 (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: 2956 Comm: systemd-journal Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mark_usage kernel/locking/lockdep.c:4504 [inline]
RIP: 0010:__lock_acquire+0xc53/0x2b00 kernel/locking/lockdep.c:4981
Code: 4c 89 ee ba 04 00 00 00 e8 3a 73 00 00 48 89 df 48 be 00 00 00 00 00 fc ff df 85 c0 0f 84 11 06 00 00 48 8b 44 24 38 8a 04 30 <84> c0 0f 85 ca 14 00 00 48 8b 44 24 20 8b 00 a9 00 00 08 00 0f 85
RSP: 0018:ffffc90001b5f920 EFLAGS: 00000046
RAX: 1ffff1100f874400 RBX: ffff88807c3a2780 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff88807c3a1d00
RBP: ffffc90001b5fa70 R08: dffffc0000000000 R09: fffffbfff1ff1bdd
R10: fffffbfff1ff1bdd R11: 0000000000000000 R12: 0000000000000000
R13: ffff88807c3a2760 R14: 0000000000000002 R15: ffff88807c3a2758
FS: 00007fc8d679e8c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8d3783000 CR3: 000000001a38a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5637
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
__debug_check_no_obj_freed lib/debugobjects.c:980 [inline]
debug_check_no_obj_freed+0xa9/0x650 lib/debugobjects.c:1023
slab_free_hook mm/slub.c:1698 [inline]
slab_free_freelist_hook+0xcf/0x1a0 mm/slub.c:1749
slab_free mm/slub.c:3513 [inline]
kmem_cache_free+0x95/0x190 mm/slub.c:3529
putname fs/namei.c:270 [inline]
user_path_at_empty+0x149/0x1a0 fs/namei.c:2803
user_path_at include/linux/namei.h:57 [inline]
do_faccessat+0x43f/0x940 fs/open.c:421
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: 0033:0x7fc8d5a599c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffeda617bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffeda61ac00 RCX: 00007fc8d5a599c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005634f34cc9a3
RBP: 00007ffeda617d20 R08: 00005634f34c23e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00005634f3cb98a0 R15: 00007ffeda618210
----------------
Code disassembly (best guess):
0: 4c 89 ee mov %r13,%rsi
3: ba 04 00 00 00 mov $0x4,%edx
8: e8 3a 73 00 00 callq 0x7347
d: 48 89 df mov %rbx,%rdi
10: 48 be 00 00 00 00 00 movabs $0xdffffc0000000000,%rsi
17: fc ff df
1a: 85 c0 test %eax,%eax
1c: 0f 84 11 06 00 00 je 0x633
22: 48 8b 44 24 38 mov 0x38(%rsp),%rax
27: 8a 04 30 mov (%rax,%rsi,1),%al
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 ca 14 00 00 jne 0x14fc
32: 48 8b 44 24 20 mov 0x20(%rsp),%rax
37: 8b 00 mov (%rax),%eax
39: a9 00 00 08 00 test $0x80000,%eax
3e: 0f .byte 0xf
3f: 85 .byte 0x85