INFO: task kworker/u4:4:194 blocked for more than 143 seconds.
Not tainted 5.11.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:4 state:D stack:25856 pid: 194 ppid: 2 flags:0x00004000
Workqueue: tc_filter_workqueue u32_delete_key_freepf_work
Call Trace:
context_switch kernel/sched/core.c:4313 [inline]
__schedule+0x90c/0x21a0 kernel/sched/core.c:5064
schedule+0xcf/0x270 kernel/sched/core.c:5143
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5202
__mutex_lock_common kernel/locking/mutex.c:1033 [inline]
__mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103
u32_delete_key_freepf_work+0xe/0x30 net/sched/cls_u32.c:439
process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275
worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task kworker/1:4:9740 blocked for more than 143 seconds.
Not tainted 5.11.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4 state:D stack:26192 pid: 9740 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:4313 [inline]
__schedule+0x90c/0x21a0 kernel/sched/core.c:5064
schedule+0xcf/0x270 kernel/sched/core.c:5143
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5202
__mutex_lock_common kernel/locking/mutex.c:1033 [inline]
__mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103
addrconf_dad_work+0xa3/0x1280 net/ipv6/addrconf.c:4028
process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275
worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Showing all locks held in the system:
3 locks held by kworker/u4:2/88:
3 locks held by kworker/u4:4/194:
#0: ffff88801514a938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801514a938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff88801514a938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff88801514a938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff88801514a938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff88801514a938 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 kernel/workqueue.c:2246
#1: ffffc9000173fda8 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250
#2: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: u32_delete_key_freepf_work+0xe/0x30 net/sched/cls_u32.c:439
1 lock held by khungtaskd/1660:
#0: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254
1 lock held by in:imklog/8170:
#0: ffff88802345d4f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947
3 locks held by kworker/1:4/9740:
#0: ffff8881470f8d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881470f8d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff8881470f8d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff8881470f8d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
#0: ffff8881470f8d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
#0: ffff8881470f8d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 kernel/workqueue.c:2246
#1: ffffc90015f7fda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250
#2: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x1280 net/ipv6/addrconf.c:4028
2 locks held by syz-executor.1/10000:
1 lock held by syz-executor.4/10020:
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: do_ipv6_setsockopt.constprop.0+0x2f6/0x4140 net/ipv6/ipv6_sockglue.c:417
1 lock held by syz-executor.5/10023:
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5561
1 lock held by syz-executor.5/10029:
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5561
1 lock held by syz-executor.2/10028:
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5561
1 lock held by syz-executor.2/10046:
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5561
1 lock held by syz-executor.3/10038:
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x1f2/0x2d0 net/socket.c:1050
1 lock held by syz-executor.3/10039:
#0: ffffffff8c946668 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x1f2/0x2d0 net/socket.c:1050
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1660 Comm: khungtaskd Not tainted 5.11.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x107/0x163 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
watchdog+0xd43/0xfa0 kernel/hung_task.c:294
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10000 Comm: syz-executor.1 Not tainted 5.11.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_acquire+0x11/0x740 kernel/locking/lockdep.c:5405
Code: 88 ef 8c e8 41 7c 5c 00 e9 fb fe ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 41 89 d7 41 56 <41> 89 f6 41 55 49 89 fd 41 54 41 89 cc 55 44 89 c5 53 48 81 ec b0
RSP: 0018:ffffc90001e9eb50 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880217f4668
RBP: ffff8880217f4600 R08: 0000000000000001 R09: 0000000000000000
R10: ffffed10042fe8c0 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880217f4600 R15: 0000000000000000
FS: 00007fa144f34700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78cb3db000 CR3: 00000000248d6000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__mutex_lock_common kernel/locking/mutex.c:956 [inline]
__mutex_lock+0x134/0x1110 kernel/locking/mutex.c:1103
tcf_idr_check_alloc+0x78/0x3b0 net/sched/act_api.c:549
tcf_police_init+0x347/0x13a0 net/sched/act_police.c:81
tcf_action_init_1+0x1a3/0x990 net/sched/act_api.c:1013
tcf_exts_validate+0x138/0x420 net/sched/cls_api.c:3046
u32_set_parms+0xb9/0xc60 net/sched/cls_u32.c:717
u32_change+0x1f13/0x3000 net/sched/cls_u32.c:1063
tc_new_tfilter+0x1394/0x2120 net/sched/cls_api.c:2127
rtnetlink_rcv_msg+0x80e/0xad0 net/core/rtnetlink.c:5555
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:672
____sys_sendmsg+0x331/0x810 net/socket.c:2345
___sys_sendmsg+0xf3/0x170 net/socket.c:2399
__sys_sendmmsg+0x195/0x470 net/socket.c:2489
__do_sys_sendmmsg net/socket.c:2518 [inline]
__se_sys_sendmmsg net/socket.c:2515 [inline]
__x64_sys_sendmmsg+0x99/0x100 net/socket.c:2515
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa144f33c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045e219
RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 000000000119c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034
R13: 00000000016afb5f R14: 00007fa144f349c0 R15: 000000000119c034