INFO: task syz-executor.0:5451 blocked for more than 143 seconds.
Not tainted 6.8.0-rc2-syzkaller-g3f24fcdacd40 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26704 pid:5451 tgid:5449 ppid:5425 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17d1/0x49f0 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
inode_lock_nested include/linux/fs.h:837 [inline]
fuse_reverse_inval_entry+0x62/0x730 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+0x3447/0x54f0 fs/fuse/dev.c:1876
fuse_dev_write+0x149/0x1d0 fs/fuse/dev.c:1960
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa83/0xcb0 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fdb2a079a29
RSP: 002b:00007fdb2b2270c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fdb2a18c050 RCX: 00007fdb2a079a29
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fdb2a0d5170 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fdb2a18c050 R15: 00007ffec89399f8
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#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
2 locks held by getty/4820:
#0: ffff88802aeac0a0 (&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
1 lock held by syz-executor.0/5425:
#0: ffff888072c68150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888072c68150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.0/5450:
#0: ffff888072c68150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888072c68150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
#1: ffff888072c685c8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd3/0x120 fs/fuse/inode.c:544
2 locks held by syz-executor.0/5451:
#0: ffff888061170338 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1551 [inline]
#0: ffff888061170338 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify fs/fuse/dev.c:1801 [inline]
#0: ffff888061170338 (&fc->killsb){.+.+}-{3:3}, at: fuse_dev_do_write+0x33dd/0x54f0 fs/fuse/dev.c:1876
#1: ffff888072c68150 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888072c68150 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: fuse_reverse_inval_entry+0x62/0x730 fs/fuse/dir.c:1351
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.8.0-rc2-syzkaller-g3f24fcdacd40 #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+0x2f1/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/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: 4498 Comm: syslogd Not tainted 6.8.0-rc2-syzkaller-g3f24fcdacd40 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:mm_cid_put_lazy kernel/sched/sched.h:3273 [inline]
RIP: 0010:switch_mm_cid kernel/sched/sched.h:3458 [inline]
RIP: 0010:context_switch kernel/sched/core.c:5395 [inline]
RIP: 0010:__schedule+0x14c8/0x49f0 kernel/sched/core.c:6727
Code: 8b 05 8c 46 93 74 85 c0 75 0f 65 8b 05 39 43 93 74 85 c0 0f 85 77 05 00 00 48 c7 c7 c0 65 aa 8b e8 4d 28 f7 ff 65 41 8b 5d 08 <4d> 89 f4 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 04
RSP: 0018:ffffc9000314f4e0 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: ffffffff8baa65c0 RDI: ffffffff8bfe67a0
RBP: ffffc9000314f700 R08: ffffffff81332991 R09: 1ffff1100dbc4350
R10: dffffc0000000000 R11: ffffed100dbc4351 R12: ffff88806e6d40a8
R13: 0000607f4681d0c0 R14: ffffc9000314f640 R15: ffff888014c7df00
FS: 00007fee13835380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dd58c72680 CR3: 000000002d84a000 CR4: 0000000000350ef0
Call Trace:
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
__skb_wait_for_more_packets+0x398/0x600 net/core/datagram.c:121
__unix_dgram_recvmsg+0x355/0x12c0 net/unix/af_unix.c:2394
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg+0x231/0x280 net/socket.c:1068
sock_read_iter+0x2ca/0x3e0 net/socket.c:1138
call_read_iter include/linux/fs.h:2079 [inline]
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x97a/0xb70 fs/read_write.c:476
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fee13989b6a
Code: Unable to access opcode bytes at 0x7fee13989b40.
RSP: 002b:00007ffedd5a4278 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fee13989b6a
RDX: 00000000000000ff RSI: 00005605a16fc950 RDI: 0000000000000000
RBP: 00005605a16fc910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007fee13b283a3 R11: 0000000000000246 R12: 00005605a16fc9a1
R13: 00005605a16fc950 R14: 0000000000000000 R15: 00007fee13b66a80