INFO: task syz-executor.4:27276 blocked for more than 143 seconds.
Not tainted 6.8.0-rc4-syzkaller-00388-gced590523156 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27440 pid:27276 tgid:27275 ppid:27076 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1ae/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+0x200/0x780 fs/super.c:793
vfs_get_super fs/super.c:1268 [inline]
get_tree_single+0x2f/0x150 fs/super.c:1300
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+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f4548e7dda9
RSP: 002b:00007f4549cb30c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007f4548fabf80 RCX: 00007f4548e7dda9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007f4548eca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4548fabf80 R15: 00007ffcb64d8098
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
1 lock held by udevd/4509:
2 locks held by kworker/1:3/4525:
2 locks held by getty/4816:
#0: ffff88802d2480a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/0:5/26485:
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc9001a21fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc9001a21fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
2 locks held by syz-executor.4/26972:
2 locks held by syz-executor.4/27276:
#0: ffff88802d443070 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff88802d443070 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff88802ee480e0 (&type->s_umount_key#119){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#1: ffff88802ee480e0 (&type->s_umount_key#119){+.+.}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
2 locks held by syz-executor.4/27769:
#0: ffff888030023470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff888030023470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff88802ee480e0 (&type->s_umount_key#119){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#1: ffff88802ee480e0 (&type->s_umount_key#119){+.+.}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
2 locks held by syz-executor.4/28377:
#0: ffff888057347470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff888057347470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff88802ee480e0 (&type->s_umount_key#119){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#1: ffff88802ee480e0 (&type->s_umount_key#119){+.+.}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
2 locks held by syz-executor.4/29171:
2 locks held by syz-executor.3/29186:
4 locks held by syz-executor.2/29194:
2 locks held by syz-executor.1/29196:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc4-syzkaller-00388-gced590523156 #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+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4509 Comm: udevd Not tainted 6.8.0-rc4-syzkaller-00388-gced590523156 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:trace_irq_enable+0x34/0x100 include/trace/events/preemptirq.h:40
Code: 69 7e 83 f8 08 73 36 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 68 39 84 8f be 08 00 00 00 e8 c4 a4 57 00 48 0f a3 1d f4 a0 e9 0d <73> 09 e8 f5 37 e0 ff 84 c0 74 0e 5b 41 5e c3 cc cc cc cc 90 0f 0b
RSP: 0018:ffffc9000316f2c0 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff819a986c
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f843968
RBP: ffffc9000316f390 R08: ffffffff8f84396f R09: 1ffffffff1f0872d
R10: dffffc0000000000 R11: fffffbfff1f0872e R12: 1ffff9200062de5c
R13: ffffffff8de14688 R14: 0000000000000200 R15: ffffffff8212c4d6
FS: 00007f2f8d4d3c80(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555560fc978 CR3: 000000002a134000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56
seqcount_lockdep_reader_access+0x14d/0x220 include/linux/seqlock.h:74
read_seqbegin include/linux/seqlock.h:772 [inline]
read_seqbegin_or_lock include/linux/seqlock.h:1076 [inline]
prepend_path+0x2d6/0xbe0 fs/d_path.c:171
d_absolute_path+0x179/0x310 fs/d_path.c:234
tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
tomoyo_realpath_from_path+0x2b4/0x5e0 security/tomoyo/realpath.c:271
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771
security_file_open+0x69/0x570 security/security.c:2933
do_dentry_open+0x327/0x15a0 fs/open.c:940
do_open fs/namei.c:3641 [inline]
path_openat+0x285f/0x3240 fs/namei.c:3798
do_filp_open+0x234/0x490 fs/namei.c:3825
do_sys_openat2+0x13e/0x1d0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_openat fs/open.c:1435 [inline]
__se_sys_openat fs/open.c:1430 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1430
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f2f8d11a477
Code: 10 00 00 00 44 8b 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 82 69 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff676f1908 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055da78539e10 RCX: 00007f2f8d11a477
RDX: 0000000000090800 RSI: 000055da78523bc0 RDI: 00000000ffffff9c
RBP: 000055da785b5240 R08: 0000000000090800 R09: 000055da78523bc0
R10: 0000000000000000 R11: 0000000000000287 R12: 000055da78523bc0
R13: 00000000000000ff R14: 000055da769491c4 R15: 0000000000000000