INFO: task syz-executor.0:3641 blocked for more than 143 seconds.
Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:24312 pid: 3641 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
fuse_lock_inode+0xce/0x100 fs/fuse/inode.c:468
fuse_lookup.part.0+0x86/0x390 fs/fuse/dir.c:432
fuse_lookup+0x70/0x90 fs/fuse/dir.c:429
__lookup_slow+0x24c/0x460 fs/namei.c:1685
lookup_slow fs/namei.c:1702 [inline]
walk_component+0x33f/0x5a0 fs/namei.c:1993
link_path_walk.part.0+0x74e/0xe20 fs/namei.c:2320
link_path_walk fs/namei.c:2245 [inline]
path_openat+0x262/0x28f0 fs/namei.c:3687
do_filp_open+0x1b6/0x400 fs/namei.c:3718
do_sys_openat2+0x16d/0x4c0 fs/open.c:1311
do_sys_open fs/open.c:1327 [inline]
__do_sys_openat fs/open.c:1343 [inline]
__se_sys_openat fs/open.c:1338 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1338
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8651888f48
RSP: 002b:00007ffc60408290 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000000fc RCX: 00007f8651888f48
RDX: 0000000000090800 RSI: 00007f86518e3532 RDI: 00000000ffffff9c
RBP: 00007ffc6040835c R08: 0000000000090800 R09: 00007f86518e3532
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 0000000000056e5e R14: 0000000000000007 R15: 00007ffc604083c0
INFO: task syz-executor.0:5355 blocked for more than 143 seconds.
Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27624 pid: 5355 ppid: 3641 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
request_wait_answer+0x46d/0x850 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x71d/0xe50 fs/fuse/dev.c:511
fuse_lookup_name+0x280/0x630 fs/fuse/dir.c:392
fuse_lookup.part.0+0xdf/0x390 fs/fuse/dir.c:433
fuse_lookup+0x70/0x90 fs/fuse/dir.c:429
__lookup_slow+0x24c/0x460 fs/namei.c:1685
lookup_slow fs/namei.c:1702 [inline]
walk_component+0x33f/0x5a0 fs/namei.c:1993
link_path_walk.part.0+0x74e/0xe20 fs/namei.c:2320
link_path_walk fs/namei.c:2245 [inline]
path_openat+0x262/0x28f0 fs/namei.c:3687
do_filp_open+0x1b6/0x400 fs/namei.c:3718
do_sys_openat2+0x16d/0x4c0 fs/open.c:1311
do_sys_open fs/open.c:1327 [inline]
__do_sys_openat fs/open.c:1343 [inline]
__se_sys_openat fs/open.c:1338 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1338
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8651889409
RSP: 002b:00007f86529a5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f865199c120 RCX: 00007f8651889409
RDX: 0000000000000042 RSI: 0000000020002080 RDI: ffffffffffffff9c
RBP: 00007f86518e4367 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc6040809f R14: 00007f86529a5300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf85db0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf85ab0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
5 locks held by kworker/1:0/22:
#0: ffff8880b9b3a018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:544
#1: ffff8880b9b277c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3e7/0x4e0 kernel/sched/psi.c:885
#2: ffffffff9140da78 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:977 [inline]
#2: ffffffff9140da78 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0xc7/0x420 lib/debugobjects.c:1020
#3: ffff8880b9b283d8 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x60c/0xe30 kernel/time/timer.c:1096
#4: ffffffff9138ebd8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:658
1 lock held by khungtaskd/28:
#0: ffffffff8bf86900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
2 locks held by getty/3285:
#0: ffff88814b1f3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90001c382f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.0/3641:
#0: ffff88806d5f3890 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
#0: ffff88806d5f3890 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1701 [inline]
#0: ffff88806d5f3890 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1993
#1: ffff88806d5f3cf8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xce/0x100 fs/fuse/inode.c:468
2 locks held by syz-executor.0/5355:
#0: ffff88806d5f3890 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
#0: ffff88806d5f3890 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1701 [inline]
#0: ffff88806d5f3890 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1993
#1: ffff88806d5f3cf8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xce/0x100 fs/fuse/inode.c:468
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc18/0xf50 kernel/hung_task.c:369
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3640 Comm: syz-fuzzer Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:is_file_epoll fs/eventpoll.c:335 [inline]
RIP: 0010:do_epoll_wait+0x1c1/0x1950 fs/eventpoll.c:2246
Code: 89 44 24 68 e8 40 d8 91 ff 48 85 db 0f 84 51 14 00 00 e8 52 db 91 ff 48 8b 44 24 68 48 8d 78 28 48 b8 00 00 00 00 00 fc ff df <48> 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 fb 14 00 00 48 8b 44 24 68
RSP: 0018:ffffc90003147c50 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: ffff888026a232c0 RCX: 0000000000000000
RDX: ffff8880737c6200 RSI: ffffffff81e95cce RDI: ffff888026a232e8
RBP: 0000000000000003 R08: 0000000000000007 R09: 0000000000000000
R10: ffff888026a232c0 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000080 R14: ffffc90003147ea0 R15: 000000c00208d840
FS: 000000c025a0b090(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c02080a8c8 CR3: 0000000025049000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_compat_epoll_pwait.part.0+0x29/0x1d0 fs/eventpoll.c:2290
do_epoll_pwait fs/eventpoll.c:2297 [inline]
__do_sys_epoll_pwait fs/eventpoll.c:2303 [inline]
__se_sys_epoll_pwait fs/eventpoll.c:2297 [inline]
__x64_sys_epoll_pwait+0x1cf/0x310 fs/eventpoll.c:2297
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x466ae0
Code: 0f 05 89 44 24 20 c3 cc cc cc 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 44 8b 54 24 1c 49 c7 c0 00 00 00 00 b8 19 01 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 002b:000000c00208d7e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000466ae0
RDX: 0000000000000080 RSI: 000000c00208d840 RDI: 0000000000000003
RBP: 000000c00208de40 R08: 0000000000000000 R09: 00000075fe63e136
R10: 0000000000000007 R11: 0000000000000246 R12: 000000c00208d870
R13: 0000000000004780 R14: 000000c023e2d040 R15: 0000000000001018