INFO: task kworker/1:12:5356 blocked for more than 143 seconds.
Not tainted 6.2.0-syzkaller-12913-gae3419fbac84 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:12 state:D stack:22368 pid:5356 ppid:2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x17d8/0x4990 kernel/sched/core.c:6622
schedule+0xc3/0x180 kernel/sched/core.c:6698
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
__mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4629
process_one_work+0x915/0x13a0 kernel/workqueue.c:2390
worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task kworker/u4:1:17429 blocked for more than 144 seconds.
Not tainted 6.2.0-syzkaller-12913-gae3419fbac84 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1 state:D stack:21112 pid:17429 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x17d8/0x4990 kernel/sched/core.c:6622
schedule+0xc3/0x180 kernel/sched/core.c:6698
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
__mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
cangw_pernet_exit_batch+0x20/0x90 net/can/gw.c:1257
ops_exit_list net/core/net_namespace.c:174 [inline]
cleanup_net+0x767/0xb80 net/core/net_namespace.c:613
process_one_work+0x915/0x13a0 kernel/workqueue.c:2390
worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task syz-executor.0:23012 blocked for more than 144 seconds.
Not tainted 6.2.0-syzkaller-12913-gae3419fbac84 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:24416 pid:23012 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x17d8/0x4990 kernel/sched/core.c:6622
schedule+0xc3/0x180 kernel/sched/core.c:6698
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
__mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]
smc_pnet_net_init+0x178/0x400 net/smc/smc_pnet.c:878
ops_init+0x351/0x600 net/core/net_namespace.c:135
setup_net+0x4b9/0xb90 net/core/net_namespace.c:338
copy_net_ns+0x4cb/0x790 net/core/net_namespace.c:490
create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x122/0x170 kernel/nsproxy.c:228
ksys_unshare+0x584/0xb20 kernel/fork.c:3205
__do_sys_unshare kernel/fork.c:3276 [inline]
__se_sys_unshare kernel/fork.c:3274 [inline]
__x64_sys_unshare+0x38/0x40 kernel/fork.c:3274
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fcb7428d6b7
RSP: 002b:00007ffdb985e3f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ffdb985ea38 RCX: 00007fcb7428d6b7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 00007ffdb985e4d0 R14: 00007fcb743ac9d8 R15: 000000000000000c
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d127c70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d128470 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8d127aa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4747:
#0: ffff88802bd2c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
3 locks held by kworker/1:12/5356:
#0: ffff888027850938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0
#1: ffffc90004ccfd20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365
#2: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4629
4 locks held by kworker/u4:1/17429:
#0: ffff888016612938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0
#1: ffffc9000547fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365
#2: ffffffff8e289e90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf5/0xb80 net/core/net_namespace.c:575
#3: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit_batch+0x20/0x90 net/can/gw.c:1257
3 locks held by kworker/0:3/18043:
#0: ffff888027850938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0
#1: ffffc90012a87d20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365
#2: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4629
1 lock held by syz-executor.2/22908:
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:697 [inline]
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3473
3 locks held by syz-executor.0/22955:
2 locks held by syz-executor.2/23006:
#0: ffffffff8e289e90 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4af/0x790 net/core/net_namespace.c:486
#1: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]
#1: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x178/0x400 net/smc/smc_pnet.c:878
2 locks held by syz-executor.0/23012:
#0: ffffffff8e289e90 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4af/0x790 net/core/net_namespace.c:486
#1: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]
#1: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x178/0x400 net/smc/smc_pnet.c:878
1 lock held by syz-executor.2/23017:
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ce/0xf40 net/core/rtnetlink.c:6171
1 lock held by syz-executor.0/23026:
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ce/0xf40 net/core/rtnetlink.c:6171
1 lock held by syz-executor.2/23039:
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ce/0xf40 net/core/rtnetlink.c:6171
1 lock held by syz-executor.0/23043:
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline]
#0: ffffffff8e296408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ce/0xf40 net/core/rtnetlink.c:6171
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-syzkaller-12913-gae3419fbac84 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e5/0x560 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1b4/0x410 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0x1024/0x1070 kernel/hung_task.c:379
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5263 Comm: syz-fuzzer Not tainted 6.2.0-syzkaller-12913-gae3419fbac84 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
RIP: 0033:0x414b09
Code: 00 e8 9b fc ff ff 48 8b 54 24 20 31 c0 48 89 d3 48 89 c1 48 8b 6c 24 28 48 83 c4 30 c3 cc cc cc cc 48 83 ec 18 48 89 6c 24 10 <48> 8d 6c 24 10 48 8b 15 9b 65 ad 01 84 02 90 48 be 00 00 00 00 00
RSP: 002b:000000c001079e48 EFLAGS: 00000216
RAX: 000000c016862e00 RBX: 0000000000000010 RCX: 0000000000000000
RDX: 0000000000000004 RSI: 0000000000000030 RDI: 0000000000000020
RBP: 000000c001079e78 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000007c R12: 000000c001079f08
R13: 0000000000000000 R14: 000000c01b23a340 R15: 00000000010de640
FS: 000000c021e27090 GS: 0000000000000000