INFO: task syz-executor.3:5224 blocked for more than 143 seconds.
Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:29360 pid:5224 tgid:5218 ppid:5077 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5c70 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6828
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:803 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3689 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__x64_sys_mount+0x1ff/0x320 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fbb4fc7de69
RSP: 002b:00007fbb509010c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbb4fdac050 RCX: 00007fbb4fc7de69
RDX: 0000000020000280 RSI: 0000000020000240 RDI: 0000000020000200
RBP: 00007fbb4fcca47a R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fbb4fdac050 R15: 00007ffe9c819e18
INFO: task syz-executor.3:5228 blocked for more than 144 seconds.
Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24736 pid:5228 tgid:5218 ppid:5077 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5c70 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6828
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:803 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
__do_sys_move_mount+0x1e8/0xe40 fs/namespace.c:4099
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fbb4fc7de69
RSP: 002b:00007fbb4f7ff0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ad
RAX: ffffffffffffffda RBX: 00007fbb4fdac120 RCX: 00007fbb4fc7de69
RDX: ffffffffffffff9c RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007fbb4fcca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fbb4fdac120 R15: 00007ffe9c819e18
Showing all locks held in the system:
4 locks held by kworker/u8:1/11:
#0: ffff888015ed3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229
#1: ffffc90000107d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230
#2: ffffffff8f2e1650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:591
#3: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit_batch+0x15/0xa0 net/can/gw.c:1257
1 lock held by khungtaskd/29:
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:6/146:
#0: ffff88802a8e9148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229
#1: ffffc90002e8fd80 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230
#2: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcf/0x1500 net/ipv6/addrconf.c:4191
2 locks held by getty/4820:
#0: ffff88802a8090a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015d02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
3 locks held by kworker/0:3/5096:
#0: ffff888015078948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229
#1: ffffc9000367fd80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230
#2: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
2 locks held by syz-executor.3/5220:
1 lock held by syz-executor.3/5224:
#0: ffff888062bfc188 (&type->i_mutex_dir_key#10){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:803 [inline]
#0: ffff888062bfc188 (&type->i_mutex_dir_key#10){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff888062bfc188 (&type->i_mutex_dir_key#10){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.3/5228:
#0: ffff888062bfc188 (&type->i_mutex_dir_key#10){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:803 [inline]
#0: ffff888062bfc188 (&type->i_mutex_dir_key#10){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff888062bfc188 (&type->i_mutex_dir_key#10){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.1/6800:
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
8 locks held by syz-executor.3/6852:
#0: ffff88802ac52420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:643
#1: ffff88804399a488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x281/0x500 fs/kernfs/file.c:325
#2: ffff888022d55578 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a4/0x500 fs/kernfs/file.c:326
#3: ffffffff8e959968 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
#4: ffff88802f1d50e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff88802f1d50e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff88802f1d50e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
#5: ffff88802f1d6250 (&devlink->lock_key#7){+.+.}-{3:3}, at: nsim_drv_remove+0x4a/0x1d0 drivers/net/netdevsim/dev.c:1672
#6: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x35/0x2f0 drivers/net/netdevsim/netdev.c:451
#7: ffffffff8d7bc4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#7: ffffffff8d7bc4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.2/6985:
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
2 locks held by syz-executor.4/6996:
#0: ffffffff8f2e1650 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:501
#1: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x1b/0x70 net/ipv4/nexthop.c:3869
1 lock held by syz-executor.0/7013:
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ethtool+0x244/0x58f0 net/ethtool/ioctl.c:3176
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf86/0x1210 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11 Comm: kworker/u8:1 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: netns cleanup_net
RIP: 0010:__rcu_read_unlock+0x11d/0x580 kernel/rcu/tree_plugin.h:433
Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 75 01 00 00 8b 83 3c 04 00 00 3d ff ff ff 3f 0f 87 49 01 00 00 5b 5d 41 5c <41> 5d 41 5e c3 cc cc cc cc 65 8b 1d 7b c9 8f 7e f7 c3 00 00 f0 00
RSP: 0018:ffffc90000107a60 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff893ae526
RDX: 0000000000000000 RSI: ffffffff893ae29a RDI: ffff888016ee403c
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: 0000000000000000
R13: 00000000000017de R14: 0000000000000000 R15: 00000000000017dd
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30626000 CR3: 000000000d57a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:782 [inline]
inet_twsk_purge+0x563/0x910 net/ipv4/inet_timewait_sock.c:321
tcp_twsk_purge+0x183/0x1d0 net/ipv4/tcp_minisocks.c:405
ops_exit_list+0x128/0x180 net/core/net_namespace.c:175
cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:637
process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243