INFO: task syz-executor.0:5466 blocked for more than 143 seconds.
Not tainted 6.6.0-rc4-syzkaller-00037-g3006adf3be79 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27776 pid:5466 ppid:5396 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
rwsem_down_write_slowpath+0x53d/0x12a0 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write_nested+0x1d7/0x200 kernel/locking/rwsem.c:1690
inode_lock_nested include/linux/fs.h:837 [inline]
fuse_reverse_inval_entry+0x59/0x580 fs/fuse/dir.c:1351
fuse_notify_delete fs/fuse/dev.c:1552 [inline]
fuse_notify fs/fuse/dev.c:1801 [inline]
fuse_dev_do_write+0xe94/0x2c90 fs/fuse/dev.c:1876
fuse_dev_write+0x154/0x1e0 fs/fuse/dev.c:1960
call_write_iter include/linux/fs.h:1956 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x650/0xe40 fs/read_write.c:584
ksys_write+0x12f/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f375867c859
RSP: 002b:00007f37593d20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f375879c050 RCX: 00007f375867c859
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f37586d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f375879c050 R15: 00007ffd1cd2eba8
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8cba7920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cba7920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cba7920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
5 locks held by kworker/u4:3/42:
2 locks held by getty/4796:
#0: ffff88814bd8c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900020582f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.0/5396:
#0: ffff88806c5f0850 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88806c5f0850 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1709 [inline]
#0: ffff88806c5f0850 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x33b/0x5a0 fs/namei.c:2001
2 locks held by syz-executor.0/5462:
#0: ffff88806c5f0850 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88806c5f0850 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1709 [inline]
#0: ffff88806c5f0850 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x33b/0x5a0 fs/namei.c:2001
#1: ffff88806c5f0cc8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd2/0x110 fs/fuse/inode.c:495
2 locks held by syz-executor.0/5466:
#0: ffff88807d4c3b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1551 [inline]
#0: ffff88807d4c3b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify fs/fuse/dev.c:1801 [inline]
#0: ffff88807d4c3b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_dev_do_write+0xe74/0x2c90 fs/fuse/dev.c:1876
#1: ffff88806c5f0850 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff88806c5f0850 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: fuse_reverse_inval_entry+0x59/0x580 fs/fuse/dir.c:1351
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.6.0-rc4-syzkaller-00037-g3006adf3be79 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4476 Comm: klogd Not tainted 6.6.0-rc4-syzkaller-00037-g3006adf3be79 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0033:0x7f46dfc8e478
Code: 5f e9 75 fa ff ff 49 8b 44 24 f8 4d 8d 74 24 f0 45 31 ed 49 89 c7 49 83 e7 f8 a8 02 75 1e 48 8b 05 2d 79 12 00 64 48 83 38 00 <75> 05 e8 a9 f4 ff ff 4c 89 f7 e8 24 cb ff ff 49 89 c5 4c 89 f8 48
RSP: 002b:00007fff0a126ae0 EFLAGS: 00000202
RAX: ffffffffffffffb8 RBX: 00007fff0a126b90 RCX: 0000000000000840
RDX: 00007f46dfdb2860 RSI: 0000000000000089 RDI: 000055aebe868190
RBP: 000055aebe8612c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000000 R12: 000055aebe868190
R13: 0000000000000000 R14: 000055aebe868180 R15: 0000000000002010
FS: 00007f46dfb87380 GS: 0000000000000000