INFO: task syz-executor.4:29894 blocked for more than 143 seconds.
Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:25616 pid:29894 tgid:29893 ppid:5105 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17df/0x4a40 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6804 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6819
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
__flush_workqueue+0x730/0x1630 kernel/workqueue.c:3617
ceph_monc_stop+0x7c/0x1e0 net/ceph/mon_client.c:1248
ceph_destroy_client+0x74/0x130 net/ceph/ceph_common.c:768
destroy_fs_client+0x192/0x270 fs/ceph/super.c:899
deactivate_locked_super+0xc4/0x130 fs/super.c:477
ceph_get_tree+0x9a9/0x17b0 fs/ceph/super.c:1361
vfs_get_tree+0x90/0x2a0 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_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f34d767dda9
RSP: 002b:00007f34d69ff0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007f34d77abf80 RCX: 00007f34d767dda9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007f34d76ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f34d77abf80 R15: 00007ffecef2b6f8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:6/1081:
#0: ffff8880b943c758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffffc90004ab7d20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3024 [inline]
#1: ffffc90004ab7d20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x14f0 kernel/workqueue.c:3125
2 locks held by kworker/u4:7/1089:
#0: ffff888014c89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3024 [inline]
#0: ffff888014c89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x14f0 kernel/workqueue.c:3125
#1: ffffc90004e47d20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3024 [inline]
#1: ffffc90004e47d20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x14f0 kernel/workqueue.c:3125
2 locks held by getty/4823:
#0: ffff88801d8680a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.3/5738:
1 lock held by syz-executor.4/29894:
#0: ffff88802a922070 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff88802a922070 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
2 locks held by syz-executor.4/30867:
#0: ffff88807e360c70 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff88807e360c70 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff8880805700e0 (&type->s_umount_key#98/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
2 locks held by syz-executor.4/31660:
#0:
ffff88802b883470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
ffff88802b883470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff8880806ac0e0 (&type->s_umount_key#98/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
4 locks held by syz-executor.4/32041:
1 lock held by modprobe/887:
1 lock held by modprobe/889:
2 locks held by syz-executor.4/890:
4 locks held by modprobe/893:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfb0/0xff0 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 893 Comm: modprobe Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:240 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4774 [inline]
RIP: 0010:__lock_acquire+0x5d4/0x1fd0 kernel/locking/lockdep.c:5087
Code: 1f 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 20 34 ca 92 be 08 00 00 00 e8 06 4b 85 00 48 0f a3 1d 9e b7 58 11 73 22 <48> 69 c3 c8 00 00 00 48 8d 98 20 93 98 92 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90004e6f390 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000018 RCX: ffffffff81717c7a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff92ca3420
RBP: 0000000000000002 R08: ffffffff92ca3427 R09: 1ffffffff2594684
R10: dffffc0000000000 R11: fffffbfff2594685 R12: 0000000000000000
R13: ffff888022e69e00 R14: 000000000000000f R15: ffff888022e6a970
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1b5e077440 CR3: 00000000842be000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:842 [inline]
pfn_valid+0x113/0x440 include/linux/mmzone.h:2016
page_table_check_clear+0x21/0x730 mm/page_table_check.c:68
zap_pte_range mm/memory.c:1456 [inline]
zap_pmd_range mm/memory.c:1600 [inline]
zap_pud_range mm/memory.c:1629 [inline]
zap_p4d_range mm/memory.c:1650 [inline]
unmap_page_range+0x1e72/0x3280 mm/memory.c:1671
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1761
exit_mmap+0x2c6/0xd40 mm/mmap.c:3260
__mmput+0x115/0x3c0 kernel/fork.c:1344
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f1b5e135a90
Code: Unable to access opcode bytes at 0x7f1b5e135a66.
RSP: 002b:00007ffd9fb10c28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f1b5e226860 RCX: 00007f1b5e135a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f1b5e226860 R08: 00007ffd9fb10aa0 R09: 00007ffd9fb10b80
R10: 00007ffd9fb10ae0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f1b5e22a658 R15: 0000000000000001