INFO: task syz-executor.3:8859 blocked for more than 143 seconds.
Not tainted 6.8.0-rc2-syzkaller-00031-g861c0981648f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26800 pid:8859 tgid:8858 ppid:8612 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
__super_lock fs/super.c:56 [inline]
super_lock+0x196/0x400 fs/super.c:120
super_lock_excl fs/super.c:145 [inline]
grab_super+0xaf/0x370 fs/super.c:534
sget_fc+0x1fa/0x770 fs/super.c:793
vfs_get_super fs/super.c:1268 [inline]
get_tree_single+0x2f/0x140 fs/super.c:1300
vfs_get_tree+0x8c/0x2a0 fs/super.c:1784
vfs_cmd_create+0xe4/0x230 fs/fsopen.c:230
__do_sys_fsconfig fs/fsopen.c:476 [inline]
__se_sys_fsconfig+0x967/0xec0 fs/fsopen.c:349
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fbd5787cda9
RSP: 002b:00007fbd585b70c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fbd579abf80 RCX: 00007fbd5787cda9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007fbd578c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbd579abf80 R15: 00007ffd9a6f3988
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:4/60:
3 locks held by kworker/0:2/783:
#0: ffff888013088d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888013088d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc9000379fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc9000379fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffffffff8eb49a48 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281
2 locks held by getty/4810:
#0: ffff8880295a10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.0/5080:
2 locks held by kworker/1:3/5105:
#0: ffff88801308a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff88801308a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90004577d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90004577d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
2 locks held by syz-executor.3/8353:
2 locks held by syz-executor.3/8859:
#0: ffff88801f7c8870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff88801f7c8870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff888063db20e0 (&type->s_umount_key#80){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#1: ffff888063db20e0 (&type->s_umount_key#80){+.+.}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
2 locks held by syz-executor.3/9476:
#0: ffff88801c327470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff88801c327470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff888063db20e0 (
&type->s_umount_key#80){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
&type->s_umount_key#80){+.+.}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
3 locks held by kworker/1:6/9925:
8 locks held by syz-executor.3/10715:
#0: ffff8880293a8420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2795 [inline]
#0: ffff8880293a8420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x233/0xca0 fs/read_write.c:586
#1: ffff88808650f488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x510 fs/kernfs/file.c:325
#2: ffff88801c7062f0 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x510 fs/kernfs/file.c:326
#3: ffffffff8e4a3868 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff8880369220e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff8880369220e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff8880369220e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7a0 drivers/base/dd.c:1292
#5: ffff88807c28a250 (&devlink->lock_key#8){+.+.}-{3:3}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672
#6: ffffffff8eb49a48 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x40/0x160 drivers/net/netdevsim/netdev.c:417
#7: ffffffff8d934ab8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#7: ffffffff8d934ab8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995
3 locks held by syz-executor.0/10830:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc2-syzkaller-00031-g861c0981648f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 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+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4491 Comm: klogd Not tainted 6.8.0-rc2-syzkaller-00031-g861c0981648f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:check_preemption_disabled+0x19/0x110 lib/smp_processor_id.c:14
Code: 99 be 8b eb 0c 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 <65> 8b 1d 3c 95 dc 74 65 8b 05 31 95 dc 74 a9 ff ff ff 7f 74 22 65
RSP: 0018:ffffc9000312f428 EFLAGS: 00000086
RAX: 23cb1836b5a0c500 RBX: ffff88807cfd3b80 RCX: ffffffff925f3303
RDX: dffffc0000000000 RSI: ffffffff8b6ab3c0 RDI: ffffffff8bbe9960
RBP: ffffc9000312f508 R08: ffffffff8f02486f R09: 1ffffffff1e0490d
R10: dffffc0000000000 R11: fffffbfff1e0490e R12: dffffc0000000000
R13: 1ffff92000625ea4 R14: d091796547980eaa R15: 1ffff92000625e90
FS: 00007f305b969380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fafe89ff000 CR3: 000000002bc2f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lockdep_hardirqs_on_prepare+0x1f8/0x780 kernel/locking/lockdep.c:4358
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
_raw_spin_unlock_irqrestore+0x8f/0x140 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__put_partials+0xad/0x130 mm/slub.c:2915
put_cpu_partial+0x17b/0x250 mm/slub.c:2997
__slab_free+0x2fe/0x410 mm/slub.c:4166
qlink_free mm/kasan/quarantine.c:160 [inline]
qlist_free_all+0x6d/0xd0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:324
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3813 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
kmem_cache_alloc_node+0x18f/0x380 mm/slub.c:3903
__alloc_skb+0x181/0x420 net/core/skbuff.c:641
alloc_skb include/linux/skbuff.h:1296 [inline]
alloc_skb_with_frags+0xc3/0x780 net/core/skbuff.c:6394
sock_alloc_send_pskb+0x919/0xa50 net/core/sock.c:2784
unix_dgram_sendmsg+0x696/0x2200 net/unix/af_unix.c:1974
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x440/0x600 net/socket.c:2191
__do_sys_sendto net/socket.c:2203 [inline]
__se_sys_sendto net/socket.c:2199 [inline]
__x64_sys_sendto+0xde/0xf0 net/socket.c:2199
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f305bacb9b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffdf0a100b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f305bacb9b5
RDX: 0000000000000049 RSI: 0000557c251efb90 RDI: 0000000000000003
RBP: 0000557c251e8910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f305bc59212 R14: 00007ffdf0a101b8 R15: 0000000000000000