INFO: task syz.2.2477:10974 blocked for more than 143 seconds.
Not tainted 6.12.0-rc3-syzkaller-00454-gdb87114dcf13 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2477 state:D stack:27392 pid:10974 tgid:10973 ppid:5228 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
exfat_sync_fs+0xb0/0x160 fs/exfat/super.c:56
iterate_supers+0xc8/0x190 fs/super.c:934
ksys_sync+0xdb/0x1c0 fs/sync.c:104
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f656e77dff9
RSP: 002b:00007f656f635038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f656e935f80 RCX: 00007f656e77dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f656e7f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f656e935f80 R15: 00007fffe2d3b698
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by kworker/u8:6/2530:
7 locks held by udevd/4679:
2 locks held by getty/4983:
#0: ffff8880311700a0 (&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+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5226:
4 locks held by syz-executor/5238:
2 locks held by syz.2.2477/10974:
#0: ffff88805b4860e0 (&type->s_umount_key#73){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805b4860e0 (&type->s_umount_key#73){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff88807e1d00e8 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0xb0/0x160 fs/exfat/super.c:56
2 locks held by syz.5.3870/14583:
5 locks held by syz.2.3886/14594:
2 locks held by syz.1.3887/14598:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00454-gdb87114dcf13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 14583 Comm: syz.5.3870 Not tainted 6.12.0-rc3-syzkaller-00454-gdb87114dcf13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:fault_in_readable+0x168/0x2b0 mm/gup.c:2235
Code: 8d b3 ff 0f 00 00 48 89 d8 4d 01 e6 49 81 e6 00 f0 ff ff 49 39 c6 72 6b e8 e5 b8 b3 ff 4c 39 f3 74 6e 4c 89 64 24 10 44 8a 23 <43> 0f b6 04 2f 84 c0 75 18 44 88 64 24 40 48 81 c3 00 10 00 00 4c
RSP: 0018:ffffc9001af4fa40 EFLAGS: 00040246
RAX: ffffffff81e12f27 RBX: 00007ff8cdba7000 RCX: 0000000000040000
RDX: ffffc9000a87d000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9001af4faf8 R08: ffffffff81e12e98 R09: ffffffff84ba4c19
R10: 0000000000000002 R11: ffff888028473c00 R12: 000000000019f000
R13: dffffc0000000000 R14: 00007ff8cdc00000 R15: 1ffff920035e9f50
FS: 00007ff8d86326c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4cbc963500 CR3: 00000000592e8000 CR4: 0000000000350ef0
Call Trace:
fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
generic_perform_write+0x259/0x6d0 mm/filemap.c:4044
shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3216
new_sync_write fs/read_write.c:590 [inline]
vfs_write+0xa6f/0xc90 fs/read_write.c:683
ksys_write+0x183/0x2b0 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff8d777cadf
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48
RSP: 002b:00007ff8d8631df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000013bd7ef RCX: 00007ff8d777cadf
RDX: 00000000013bd7ef RSI: 00007ff8cce00000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000054ff
R10: 00000000000003c8 R11: 0000000000000293 R12: 0000000000000003
R13: 00007ff8d8631ef0 R14: 00007ff8d8631eb0 R15: 00007ff8cce00000