INFO: task syz-executor.0:5878 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:23896 pid: 5878 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 rwsem_down_read_slowpath+0x4ca/0x980 kernel/locking/rwsem.c:992 __down_read_common kernel/locking/rwsem.c:1213 [inline] __down_read kernel/locking/rwsem.c:1222 [inline] down_read+0xdf/0x440 kernel/locking/rwsem.c:1355 inode_lock_shared include/linux/fs.h:783 [inline] lookup_slow fs/namei.c:1560 [inline] walk_component+0x356/0x5e0 fs/namei.c:1861 link_path_walk.part.0+0x4eb/0x930 fs/namei.c:2186 link_path_walk fs/namei.c:2113 [inline] path_openat+0x206/0x2190 fs/namei.c:3367 do_filp_open+0x16d/0x390 fs/namei.c:3398 do_sys_openat2+0x11e/0x360 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_openat fs/open.c:1204 [inline] __se_sys_openat fs/open.c:1199 [inline] __x64_sys_openat+0x11b/0x1d0 fs/open.c:1199 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd37d607db8 RSP: 002b:00007fff3bcd6310 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd37d607db8 RDX: 0000000000090800 RSI: 00007fd37d661372 RDI: 00000000ffffff9c RBP: 00007fff3bcd63dc R08: 0000000000090800 R09: 00007fd37d661372 R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000 R13: 000000000000f7c4 R14: 0000000000000009 R15: 00007fff3bcd6440 INFO: task syz-executor.0:5893 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:26072 pid: 5893 ppid: 5878 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 request_wait_answer+0x38c/0x6b0 fs/fuse/dev.c:411 __fuse_request_send fs/fuse/dev.c:430 [inline] fuse_simple_request+0x41a/0xb10 fs/fuse/dev.c:515 fuse_lookup_name+0x25f/0x5e0 fs/fuse/dir.c:428 fuse_lookup.part.0+0xd6/0x2c0 fs/fuse/dir.c:469 __lookup_slow+0x1fe/0x3c0 fs/namei.c:1544 lookup_slow fs/namei.c:1561 [inline] walk_component+0x364/0x5e0 fs/namei.c:1861 link_path_walk.part.0+0x4eb/0x930 fs/namei.c:2186 link_path_walk fs/namei.c:2113 [inline] path_openat+0x206/0x2190 fs/namei.c:3367 do_filp_open+0x16d/0x390 fs/namei.c:3398 do_sys_openat2+0x11e/0x360 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_openat fs/open.c:1204 [inline] __se_sys_openat fs/open.c:1199 [inline] __x64_sys_openat+0x11b/0x1d0 fs/open.c:1199 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd37d608279 RSP: 002b:00007fd37cd7d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fd37d71af80 RCX: 00007fd37d608279 RDX: 0000000000000042 RSI: 0000000020002080 RDI: ffffffffffffff9c RBP: 00007fd37d662189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff3bcd611f R14: 00007fd37cd7d300 R15: 0000000000022000 INFO: task syz-executor.0:5894 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28784 pid: 5894 ppid: 5878 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] fuse_reverse_inval_entry+0x36/0x480 fs/fuse/dir.c:1117 fuse_notify_delete fs/fuse/dev.c:1535 [inline] fuse_notify fs/fuse/dev.c:1784 [inline] fuse_dev_do_write+0x1f25/0x2570 fs/fuse/dev.c:1859 fuse_dev_write+0x12a/0x1b0 fs/fuse/dev.c:1943 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write+0x35d/0x5f0 fs/read_write.c:518 vfs_write+0x5be/0x870 fs/read_write.c:605 ksys_write+0xf4/0x1d0 fs/read_write.c:658 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd37d608279 RSP: 002b:00007fd37cd5c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fd37d71b050 RCX: 00007fd37d608279 RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007fd37d662189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff3bcd611f R14: 00007fd37cd5c300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1605: #0: ffffffff8a76ac00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 2 locks held by getty/5100: #0: ffff888023811098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:266 #1: ffffc900016032e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x1e4/0x1740 drivers/tty/n_tty.c:2155 1 lock held by syz-executor.0/5878: #0: ffff88802eb60150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:783 [inline] #0: ffff88802eb60150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1560 [inline] #0: ffff88802eb60150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x356/0x5e0 fs/namei.c:1861 2 locks held by syz-executor.0/5893: #0: ffff88802eb60150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:783 [inline] #0: ffff88802eb60150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1560 [inline] #0: ffff88802eb60150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x356/0x5e0 fs/namei.c:1861 #1: ffff88802eb60528 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xab/0xe0 fs/fuse/inode.c:428 2 locks held by syz-executor.0/5894: #0: ffff888026bce338 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1534 [inline] #0: ffff888026bce338 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify fs/fuse/dev.c:1784 [inline] #0: ffff888026bce338 (&fc->killsb){.+.+}-{3:3}, at: fuse_dev_do_write+0x1f05/0x2570 fs/fuse/dev.c:1859 #1: ffff88802eb60150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff88802eb60150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: fuse_reverse_inval_entry+0x36/0x480 fs/fuse/dir.c:1117 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1605 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x9a/0xcc lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0x951/0xc20 kernel/hung_task.c:294 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:tick_nohz_idle_exit+0xad/0x3f0 kernel/time/tick-sched.c:1238 Code: 9b 02 00 00 f6 45 4c 01 0f 84 58 02 00 00 48 8d bd b0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 bf 02 00 00 48 83 bd b0 00 00 00 00 0f 85 2f 02 00 00 48 b8 RSP: 0018:ffffffff8a407e30 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 1ffff110173c8686 RSI: ffffffff888ae7e0 RDI: ffff8880b9e43430 RBP: ffff8880b9e43380 R08: 0000000000000000 R09: ffffffff8a4bb387 R10: fffffbfff1497670 R11: 0000000000000001 R12: ffff8880b9e433cc R13: 0000000000000000 R14: ffffffff8c307cc8 R15: ffffffff8a4bb380 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056420ff55600 CR3: 000000001d68c000 CR4: 0000000000350ef0 Call Trace: do_idle+0x2e0/0x590 kernel/sched/idle.c:312 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:396 start_kernel+0x330/0x34d init/main.c:1061 secondary_startup_64_no_verify+0xb0/0xbb