INFO: task syz-executor.3:29663 blocked for more than 143 seconds.
Not tainted 6.1.62-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28192 pid:29663 ppid:3590 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6554
schedule+0xbf/0x180 kernel/sched/core.c:6630
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6689
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
iterate_supers+0x127/0x1e0 fs/super.c:746
ksys_sync+0xd7/0x1c0 fs/sync.c:104
__do_sys_sync+0xa/0x10 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4b19a7cae9
RSP: 002b:00007f4b1a7600c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f4b19b9bf80 RCX: 00007f4b19a7cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f4b19ac847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4b19b9bf80 R15: 00007ffd45d1c7e8
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d12a230 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d12aa30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
#0: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d12a060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6493
2 locks held by getty/3304:
#0: ffff8880285d6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188
3 locks held by kworker/u4:10/3336:
3 locks held by syz-executor.1/20800:
2 locks held by kworker/0:4/20853:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc9000392fd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
3 locks held by syz-executor.5/20907:
2 locks held by syz-executor.3/29663:
#0: ffff8880868fe0e0 (&type->s_umount_key#93){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:744
#1: ffff8880868f80e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x67/0x100 fs/exfat/super.c:65
2 locks held by syz-executor.4/31300:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.62-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 20800 Comm: syz-executor.1 Not tainted 6.1.62-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4217 [inline]
RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4255 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x3ca/0x7a0 kernel/locking/lockdep.c:4314
Code: 48 ba 00 00 00 00 00 fc ff df 85 c0 74 7e 49 ff c5 41 0f b6 04 17 84 c0 75 33 49 63 06 48 83 c3 28 49 83 c4 28 49 39 c5 7c 99 60 44 89 e1 80 e1 07 80 c1 03 38 c1 7c a3 4c 89 e7 e8 af b5 77
RSP: 0018:ffffc9000364f400 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8880206ba918 RCX: ffffffff816ab68a
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff9048c3a0
RBP: ffffc9000364f4a8 R08: dffffc0000000000 R09: fffffbfff2091875
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880206ba938
R13: 0000000000000003 R14: ffff8880206ba898 R15: 1ffff110040d7513
FS: 00007fb7a03976c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002023c000 CR3: 000000007723f000 CR4: 00000000003506e0
DR0: 00000000d5483e82 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
lookup_bh_lru fs/buffer.c:1291 [inline]
__find_get_block+0x2b5/0x1120 fs/buffer.c:1303
__getblk_gfp+0x2d/0xa20 fs/buffer.c:1329
__bread_gfp+0x2a/0x370 fs/buffer.c:1367
sb_bread include/linux/buffer_head.h:338 [inline]
exfat_get_dentry+0x64d/0x8f0 fs/exfat/dir.c:731
exfat_readdir fs/exfat/dir.c:121 [inline]
exfat_iterate+0xb4f/0x3280 fs/exfat/dir.c:257
iterate_dir+0x224/0x560
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb79f67cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb7a03970c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fb79f79bf80 RCX: 00007fb79f67cae9
RDX: 0000000000001000 RSI: 0000000020000240 RDI: 0000000000000006
RBP: 00007fb79f6c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb79f79bf80 R15: 00007fff4b9eb938