INFO: task syz-executor.0:5078 blocked for more than 143 seconds.
Not tainted 6.2.0-rc1-syzkaller-00084-gc8451c141e07 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:17936 pid:5078 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x995/0xe20 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6690
__mutex_lock_common+0xe4f/0x26e0 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
fuse_lock_inode+0xc0/0x110 fs/fuse/inode.c:468
fuse_lookup+0xd2/0x5d0 fs/fuse/dir.c:432
__lookup_slow+0x266/0x3a0 fs/namei.c:1685
lookup_slow+0x53/0x70 fs/namei.c:1702
walk_component fs/namei.c:1993 [inline]
link_path_walk+0x97a/0xee0 fs/namei.c:2320
path_openat+0x237/0x2dd0 fs/namei.c:3710
do_filp_open+0x264/0x4f0 fs/namei.c:3741
do_sys_openat2+0x124/0x4e0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_openat fs/open.c:1342 [inline]
__se_sys_openat fs/open.c:1337 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1337
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: 0033:0x7f5c3e68bc18
RSP: 002b:00007ffe1cd31aa0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f5c3e68bc18
RDX: 0000000000090800 RSI: 00007f5c3e6e6bc8 RDI: 00000000ffffff9c
RBP: 00007ffe1cd31b6c R08: 0000000000090800 R09: 00007f5c3e6e6bc8
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 000000000000e644 R14: 0000000000000008 R15: 00007ffe1cd31bd0
INFO: task syz-executor.0:5097 blocked for more than 143 seconds.
Not tainted 6.2.0-rc1-syzkaller-00084-gc8451c141e07 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:21040 pid:5097 ppid:5078 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x995/0xe20 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1034/0x1870 fs/fuse/dev.c:511
fuse_lookup_name+0x349/0x830 fs/fuse/dir.c:392
fuse_lookup+0x13e/0x5d0 fs/fuse/dir.c:433
__lookup_slow+0x266/0x3a0 fs/namei.c:1685
lookup_slow+0x53/0x70 fs/namei.c:1702
walk_component fs/namei.c:1993 [inline]
link_path_walk+0x97a/0xee0 fs/namei.c:2320
path_openat+0x237/0x2dd0 fs/namei.c:3710
do_filp_open+0x264/0x4f0 fs/namei.c:3741
do_sys_openat2+0x124/0x4e0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_openat fs/open.c:1342 [inline]
__se_sys_openat fs/open.c:1337 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1337
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: 0033:0x7f5c3e63e234
RSP: 002b:00007f5c3f3a5ec0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f5c3e63e234
RDX: 0000000000000002 RSI: 00007f5c3f3a5fe0 RDI: 00000000ffffff9c
RBP: 00007f5c3f3a5fe0 R08: 0000000000000000 R09: 00000000000010f7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007f5c3f3a5fdc R14: 00007f5c3f3a5fe0 R15: 0000000020001142
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d326f50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d327750 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d326d80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4743:
#0: ffff888028453098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.0/5078:
#0: ffff888073758150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
#0: ffff888073758150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1701
#1: ffff8880737585b8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xc0/0x110 fs/fuse/inode.c:468
2 locks held by syz-executor.0/5097:
#0: ffff888073758150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
#0: ffff888073758150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1701
#1: ffff8880737585b8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xc0/0x110 fs/fuse/inode.c:468
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc1-syzkaller-00084-gc8451c141e07 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ba/0x420 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+0xcd5/0xd20 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 33 Comm: kworker/u4:2 Not tainted 6.2.0-rc1-syzkaller-00084-gc8451c141e07 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3725 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3744 [inline]
RIP: 0010:validate_chain+0x220/0x6ae0 kernel/locking/lockdep.c:3799
Code: f8 48 85 c0 48 0f 44 d8 48 85 db 74 47 4c 8d 7b 18 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 53 af 75 00 49 8b 07 <4c> 39 f0 74 1c 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74
RSP: 0018:ffffc90000aa6880 EFLAGS: 00000046
RAX: 317f775a00324726 RBX: ffffffff907e4ea0 RCX: ffffffff816bd357
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff907e1180
RBP: ffffc90000aa7918 R08: dffffc0000000000 R09: fffffbfff20fc231
R10: fffffbfff20fc231 R11: 1ffffffff20fc230 R12: dffffc0000000000
R13: fffff52000154d2c R14: 317f775a00324726 R15: ffffffff907e4eb8
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005627de7b3038 CR3: 000000000d08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055
lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
cpus_read_lock+0x3e/0x130 kernel/cpu.c:310
static_key_disable+0xe/0x20 kernel/jump_label.c:242
toggle_allocation_gate+0x1a8/0x240 mm/kfence/core.c:804
process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308