syzbot

INFO: task syslogd:2978 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc7-syzkaller-00123-ga4412fdd49dc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syslogd         state:D stack:25584 pid:2978  ppid:1      flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
 __down_read_common kernel/locking/rwsem.c:1260 [inline]
 __down_read kernel/locking/rwsem.c:1269 [inline]
 down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
 inode_lock_shared include/linux/fs.h:766 [inline]
 lookup_slow fs/namei.c:1701 [inline]
 walk_component+0x332/0x5a0 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+0x262/0x2860 fs/namei.c:3710
 do_filp_open+0x1ba/0x410 fs/namei.c:3741
 do_sys_openat2+0x16d/0x4c0 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+0x143/0x1f0 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd5c0d30697
RSP: 002b:00007ffd96d21490 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055c5330062c0 RCX: 00007fd5c0d30697
RDX: 0000000000000d41 RSI: 00007fd5c0ebe99a RDI: 00000000ffffff9c
RBP: 00007fd5c0ebe99a R08: 00007fd5c0dc0040 R09: 00007fd5c0dc00c0
R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000d41
R13: 000055c533006400 R14: 0000000000000003 R15: 000055c533006410
 </TASK>
INFO: task syz-executor243:3634 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc7-syzkaller-00123-ga4412fdd49dc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor243 state:D stack:26728 pid:3634  ppid:3631   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
 __down_read_common kernel/locking/rwsem.c:1260 [inline]
 __down_read kernel/locking/rwsem.c:1269 [inline]
 down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
 inode_lock_shared include/linux/fs.h:766 [inline]
 lookup_slow fs/namei.c:1701 [inline]
 walk_component+0x332/0x5a0 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+0x262/0x2860 fs/namei.c:3710
 do_filp_open+0x1ba/0x410 fs/namei.c:3741
 do_sys_openat2+0x16d/0x4c0 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+0x143/0x1f0 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8180dbbd78
RSP: 002b:00007ffd24db6db0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffd24db6e20 RCX: 00007f8180dbbd78
RDX: 0000000000090800 RSI: 00007f8180e12004 RDI: 00000000ffffff9c
RBP: 0000000000000e33 R08: 0000000000090800 R09: 00007f8180e12004
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffd24db6fa4
R13: 00007ffd24db6fa4 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
INFO: task syz-executor243:3636 blocked for more than 143 seconds.
      Not tainted 6.1.0-rc7-syzkaller-00123-ga4412fdd49dc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor243 state:D stack:26600 pid:3636  ppid:3634   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6656
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747
 fuse_lock_inode+0xd2/0x110 fs/fuse/inode.c:468
 fuse_lookup.part.0+0x86/0x390 fs/fuse/dir.c:432
 fuse_lookup+0x74/0x90 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+0x262/0x2860 fs/namei.c:3710
 do_filp_open+0x1ba/0x410 fs/namei.c:3741
 do_sys_openat2+0x16d/0x4c0 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+0x143/0x1f0 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8180dbc0a9
RSP: 002b:00007f8180d6d2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8180e474c0 RCX: 00007f8180dbc0a9
RDX: 0000000000000042 RSI: 0000000020002080 RDI: ffffffffffffff9c
RBP: 00007f8180e14084 R08: 0000000000000065 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000065
R13: 00007f8180e140a8 R14: 31f4000000000002 R15: 00007f8180e474c8
 </TASK>
INFO: task syz-executor243:3638 blocked for more than 144 seconds.
      Not tainted 6.1.0-rc7-syzkaller-00123-ga4412fdd49dc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor243 state:D stack:28832 pid:3638  ppid:3634   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5209 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6521
 schedule+0xde/0x1b0 kernel/sched/core.c:6597
 rwsem_down_write_slowpath+0x600/0x12e0 kernel/locking/rwsem.c:1190
 __down_write_common kernel/locking/rwsem.c:1305 [inline]
 __down_write_common kernel/locking/rwsem.c:1302 [inline]
 __down_write kernel/locking/rwsem.c:1314 [inline]
 down_write_nested+0x1ec/0x220 kernel/locking/rwsem.c:1673
 inode_lock_nested include/linux/fs.h:791 [inline]
 fuse_reverse_inval_entry+0x55/0x550 fs/fuse/dir.c:1184
 fuse_notify_delete fs/fuse/dev.c:1549 [inline]
 fuse_notify fs/fuse/dev.c:1798 [inline]
 fuse_dev_do_write+0x25a6/0x2c50 fs/fuse/dev.c:1873
 fuse_dev_write+0x154/0x1e0 fs/fuse/dev.c:1957
 call_write_iter include/linux/fs.h:2199 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x9ed/0xdd0 fs/read_write.c:584
 ksys_write+0x12b/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8180dbc0a9
RSP: 002b:00007f8180d4c2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8180e474d0 RCX: 00007f8180dbc0a9
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f8180e14084 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f8180e140a8 R14: 31f4000000000002 R15: 00007f8180e474d8
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/11:
 #0: ffffffff8c58c270 (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/12:
 #0: ffffffff8c58bf70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/27:
 #0: ffffffff8c58cdc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
2 locks held by kworker/u4:4/101:
 #0: ffff888012070138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888012070138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888012070138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888012070138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888012070138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888012070138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
 #1: ffffc9000205fda8 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
1 lock held by syslogd/2978:
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow fs/namei.c:1701 [inline]
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1993
2 locks held by udevd/2996:
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow fs/namei.c:1701 [inline]
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1993
 #1: ffff88806dd72cb8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd2/0x110 fs/fuse/inode.c:468
2 locks held by getty/3313:
 #0: ffff8880225d8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900020382f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor243/3634:
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow fs/namei.c:1701 [inline]
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1993
2 locks held by syz-executor243/3636:
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow fs/namei.c:1701 [inline]
 #0: ffff88806dd72850 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1993
 #1: ffff88806dd72cb8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd2/0x110 fs/fuse/inode.c:468
2 locks held by syz-executor243/3638:
 #0: ffff8880297f9338 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1548 [inline]
 #0: ffff8880297f9338 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify fs/fuse/dev.c:1798 [inline]
 #0: ffff8880297f9338 (&fc->killsb){.+.+}-{3:3}, at: fuse_dev_do_write+0xe75/0x2c50 fs/fuse/dev.c:1873
 #1: ffff88806dd72850 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
 #1: ffff88806dd72850 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: fuse_reverse_inval_entry+0x55/0x550 fs/fuse/dir.c:1184

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.1.0-rc7-syzkaller-00123-ga4412fdd49dc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x333/0x3c0 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+0xc75/0xfc0 kernel/hung_task.c:377
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1fd/0x2a0 drivers/acpi/processor_idle.c:572