INFO: task syz-executor.2:12385 blocked for more than 143 seconds. Not tainted 6.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27056 pid:12385 ppid:5100 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc91/0x5770 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 request_wait_answer+0x46d/0x850 fs/fuse/dev.c:407 __fuse_request_send fs/fuse/dev.c:426 [inline] fuse_simple_request+0x504/0xd80 fs/fuse/dev.c:513 fuse_lookup_name+0x27a/0x620 fs/fuse/dir.c:392 fuse_lookup.part.0+0xdf/0x390 fs/fuse/dir.c:433 fuse_lookup+0x74/0x90 fs/fuse/dir.c:429 __lookup_slow+0x24c/0x460 fs/namei.c:1686 lookup_slow fs/namei.c:1703 [inline] walk_component+0x33f/0x5a0 fs/namei.c:1994 lookup_last fs/namei.c:2451 [inline] path_lookupat+0x1ba/0x840 fs/namei.c:2475 filename_lookup+0x1d2/0x590 fs/namei.c:2504 vfs_statx+0x14c/0x430 fs/stat.c:238 do_statx+0xdd/0x160 fs/stat.c:659 __do_sys_statx fs/stat.c:686 [inline] __se_sys_statx fs/stat.c:677 [inline] __x64_sys_statx+0x15b/0x1b0 fs/stat.c:677 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: 0033:0x7f4c5248c0f9 RSP: 002b:00007f4c53173168 EFLAGS: 00000246 ORIG_RAX: 000000000000014c RAX: ffffffffffffffda RBX: 00007f4c525abf80 RCX: 00007f4c5248c0f9 RDX: 0000000000000000 RSI: 00000000200009c0 RDI: 0000000000000004 RBP: 00007f4c524e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce65a7fcf R14: 00007f4c53173300 R15: 0000000000022000 INFO: task syz-executor.2:12400 blocked for more than 145 seconds. Not tainted 6.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28152 pid:12400 ppid:5100 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc91/0x5770 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 rwsem_down_write_slowpath+0x3e2/0x1220 kernel/locking/rwsem.c:1178 __down_write_common kernel/locking/rwsem.c:1306 [inline] __down_write kernel/locking/rwsem.c:1315 [inline] down_write+0x1d2/0x200 kernel/locking/rwsem.c:1574 inode_lock include/linux/fs.h:758 [inline] lock_mount+0x8a/0x2e0 fs/namespace.c:2294 do_new_mount_fc fs/namespace.c:2985 [inline] do_new_mount fs/namespace.c:3044 [inline] path_mount+0x14e0/0x1e40 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3571 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: 0033:0x7f4c5248c0f9 RSP: 002b:00007f4c53152168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f4c525ac050 RCX: 00007f4c5248c0f9 RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007f4c524e7b39 R08: 0000000020000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce65a7fcf R14: 00007f4c53152300 R15: 0000000000022000 INFO: task syz-executor.2:12408 blocked for more than 145 seconds. Not tainted 6.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27480 pid:12408 ppid:5100 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc91/0x5770 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 rwsem_down_write_slowpath+0x3e2/0x1220 kernel/locking/rwsem.c:1178 __down_write_common kernel/locking/rwsem.c:1306 [inline] __down_write kernel/locking/rwsem.c:1315 [inline] down_write+0x1d2/0x200 kernel/locking/rwsem.c:1574 inode_lock include/linux/fs.h:758 [inline] lock_mount+0x8a/0x2e0 fs/namespace.c:2294 do_new_mount_fc fs/namespace.c:2985 [inline] do_new_mount fs/namespace.c:3044 [inline] path_mount+0x14e0/0x1e40 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3571 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: 0033:0x7f4c5248c0f9 RSP: 002b:00007f4c53131168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f4c525ac120 RCX: 00007f4c5248c0f9 RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007f4c524e7b39 R08: 0000000020000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce65a7fcf R14: 00007f4c53131300 R15: 0000000000022000 INFO: task syz-executor.2:12412 blocked for more than 146 seconds. Not tainted 6.3.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29328 pid:12412 ppid:5100 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0xc91/0x5770 kernel/sched/core.c:6622 schedule+0xde/0x1a0 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline] __down_read_common+0x7df/0xf30 kernel/locking/rwsem.c:1250 inode_lock_shared include/linux/fs.h:768 [inline] lookup_slow fs/namei.c:1702 [inline] walk_component+0x332/0x5a0 fs/namei.c:1994 lookup_last fs/namei.c:2451 [inline] path_lookupat+0x1ba/0x840 fs/namei.c:2475 filename_lookup+0x1d2/0x590 fs/namei.c:2504 vfs_statx+0x14c/0x430 fs/stat.c:238 do_statx+0xdd/0x160 fs/stat.c:659 __do_sys_statx fs/stat.c:686 [inline] __se_sys_statx fs/stat.c:677 [inline] __x64_sys_statx+0x15b/0x1b0 fs/stat.c:677 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: 0033:0x7f4c5248c0f9 RSP: 002b:00007f4c53110168 EFLAGS: 00000246 ORIG_RAX: 000000000000014c RAX: ffffffffffffffda RBX: 00007f4c525ac1f0 RCX: 00007f4c5248c0f9 RDX: 0000000000000000 RSI: 0000000020000740 RDI: 0000000000000004 RBP: 00007f4c524e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce65a7fcf R14: 00007f4c53110300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffffffff8c791bb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/12: #0: ffffffff8c7918b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/27: #0: ffffffff8c792700 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495 2 locks held by getty/4750: #0: ffff888028f4b098 (&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-executor.5/5118: #0: ffffffff8c79d9f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #0: ffffffff8c79d9f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:989 2 locks held by syz-executor.2/12385: #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: lookup_slow fs/namei.c:1702 [inline] #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1994 #1: ffff8880260787b8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd2/0x110 fs/fuse/inode.c:475 1 lock held by syz-executor.2/12400: #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2294 1 lock held by syz-executor.2/12408: #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2294 1 lock held by syz-executor.2/12412: #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: lookup_slow fs/namei.c:1702 [inline] #0: ffff888026078350 (&type->i_mutex_dir_key#21){++++}-{3:3}, at: walk_component+0x332/0x5a0 fs/namei.c:1994 1 lock held by syz-executor.2/12512: #0: ffffffff8c79d9f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #0: ffffffff8c79d9f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:989 2 locks held by kworker/1:25/13482: #0: ffff88801247a538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88801247a538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88801247a538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff88801247a538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff88801247a538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff88801247a538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x87a/0x15c0 kernel/workqueue.c:2361 #1: ffffc90016a7fda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x15c0 kernel/workqueue.c:2365 4 locks held by syz-executor.1/13746: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.3.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xe16/0x1090 kernel/hung_task.c:379 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4414 Comm: syslogd Not tainted 6.3.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:__rcu_read_unlock+0x6/0x570 kernel/rcu/tree_plugin.h:417 Code: ff 48 8b 7c 24 28 e8 b9 ee 65 00 e9 1f fb ff ff 48 8b 7c 24 30 e8 0a ee 65 00 e9 ef fa ff ff 0f 1f 44 00 00 f3 0f 1e fa 41 56 <41> 55 41 54 55 65 48 8b 2c 25 c0 b8 03 00 53 48 8d bd 3c 04 00 00 RSP: 0018:ffffc9000346f8f0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 1ffff9200068df23 RCX: 0000000000000000 RDX: ffff88807ddb6080 RSI: ffffffff83c98030 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff91f24440 R13: ffffc9000346fa30 R14: 0000000000000047 R15: 0000000000000019 FS: 00007f8733904800(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b24000 CR3: 000000007df44000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:805 [inline] avc_has_perm_noaudit+0x1d5/0x3e0 security/selinux/avc.c:1163 avc_has_perm+0xb3/0x1b0 security/selinux/avc.c:1190 sock_has_perm+0x1e6/0x280 security/selinux/hooks.c:4571 security_socket_recvmsg+0x60/0xc0 security/security.c:2312 sock_recvmsg+0x4a/0x160 net/socket.c:1036 sock_read_iter+0x2bd/0x3b0 net/socket.c:1116 call_read_iter include/linux/fs.h:1845 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7fa/0x930 fs/read_write.c:470 ksys_read+0x1ec/0x250 fs/read_write.c:613 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: 0033:0x7f8733a908fe Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28 RSP: 002b:00007ffdd81ec088 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f8733a908fe RDX: 00000000000000ff RSI: 00005628681e1300 RDI: 0000000000000000 RBP: 00005628681e12c0 R08: 00007f8733b20040 R09: 00007f8733b200c0 R10: 00007f8733b1ffc0 R11: 0000000000000246 R12: 00005628681e1354 R13: 00005628681e1300 R14: 0000000000000000 R15: 0000000000000000