IPVS: ftp: loaded support on port[0] = 21 INFO: task syz-executor6:9223 blocked for more than 140 seconds. Not tainted 4.19.0-rc1+ #214 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D21560 9223 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1003 [inline] __mutex_lock+0xbf9/0x1700 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 fuse_lookup+0x8f/0x4c0 fs/fuse/dir.c:360 __lookup_slow+0x2b5/0x540 fs/namei.c:1671 lookup_slow+0x57/0x80 fs/namei.c:1688 walk_component+0x94a/0x2630 fs/namei.c:1810 link_path_walk.part.40+0xa6e/0x1540 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x268/0x5340 fs/namei.c:3533 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x584/0x720 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455190 Code: 24 98 00 00 00 48 89 14 24 e8 dc ef ff ff 48 8b 44 24 10 48 8b 4c 24 08 48 8b 54 24 70 48 39 d0 0f 85 69 01 00 00 48 8b 9c 24 <10> 01 00 00 48 89 1c 24 48 89 54 24 08 48 89 4c 24 10 48 89 44 24 RSP: 002b:00007ffc6cb09ec0 EFLAGS: 00000206 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455190 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004c1e00 RBP: 0000000000000176 R08: 0000000000000001 R09: 000000000220d940 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000017 R13: 000000000004f014 R14: 0000000000000024 R15: badc0ffeebadface INFO: task syz-executor6:10841 blocked for more than 140 seconds. Not tainted 4.19.0-rc1+ #214 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D22240 10841 9223 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 request_wait_answer+0x4c8/0x920 fs/fuse/dev.c:474 __fuse_request_send+0x12a/0x1d0 fs/fuse/dev.c:494 fuse_request_send+0x62/0xa0 fs/fuse/dev.c:507 fuse_simple_request+0x33d/0x730 fs/fuse/dev.c:565 fuse_lookup_name+0x3ee/0x830 fs/fuse/dir.c:323 fuse_lookup+0xff/0x4c0 fs/fuse/dir.c:361 __lookup_slow+0x2b5/0x540 fs/namei.c:1671 lookup_slow+0x57/0x80 fs/namei.c:1688 walk_component+0x94a/0x2630 fs/namei.c:1810 link_path_walk.part.40+0xa6e/0x1540 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x268/0x5340 fs/namei.c:3533 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x584/0x720 fs/open.c:1063 __do_sys_openat fs/open.c:1090 [inline] __se_sys_openat fs/open.c:1084 [inline] __x64_sys_openat+0x9d/0x100 fs/open.c:1084 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: Bad RIP value. RSP: 002b:00007fcff1c6bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fcff1c6c6d4 RCX: 0000000000457089 RDX: 0000000000010000 RSI: 0000000020000600 RDI: ffffffffffffff9c RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d3148 R14: 00000000004c8108 R15: 0000000000000000 INFO: task syz-executor6:10853 blocked for more than 140 seconds. Not tainted 4.19.0-rc1+ #214 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D22240 10853 9223 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 d_wait_lookup fs/dcache.c:2428 [inline] d_alloc_parallel+0x1456/0x1eb0 fs/dcache.c:2510 __lookup_slow+0x1e6/0x540 fs/namei.c:1654 lookup_slow+0x57/0x80 fs/namei.c:1688 walk_component+0x94a/0x2630 fs/namei.c:1810 link_path_walk.part.40+0xa6e/0x1540 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x268/0x5340 fs/namei.c:3533 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x584/0x720 fs/open.c:1063 __do_sys_openat fs/open.c:1090 [inline] __se_sys_openat fs/open.c:1084 [inline] __x64_sys_openat+0x9d/0x100 fs/open.c:1084 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: Bad RIP value. RSP: 002b:00007fcff1c29c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fcff1c2a6d4 RCX: 0000000000457089 RDX: 0000000000000002 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d3160 R14: 00000000004c8114 R15: 0000000000000002 Showing all locks held in the system: 1 lock held by khungtaskd/792: #0: 000000006eb7625f (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4436 1 lock held by rsyslogd/4558: #0: 0000000059225c70 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/4649: #0: 000000005411c7a5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000009bfe19a6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4650: #0: 00000000d88bd335 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000002417ca18 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4651: #0: 00000000ecfbad8c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003970d55b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4652: #0: 0000000064e7dda2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000e690bb4b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4653: #0: 00000000bfae2b60 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000af527d09 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4654: #0: 00000000cf35e18b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000fa93b480 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4655: #0: 00000000948f90cd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000064538c6f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by syz-executor6/9223: #0: 00000000595899f0 (&type->i_mutex_dir_key#5){++++}, at: inode_lock_shared include/linux/fs.h:748 [inline] #0: 00000000595899f0 (&type->i_mutex_dir_key#5){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 #1: 00000000b205b3ca (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 2 locks held by syz-executor6/10841: #0: 00000000595899f0 (&type->i_mutex_dir_key#5){++++}, at: inode_lock_shared include/linux/fs.h:748 [inline] #0: 00000000595899f0 (&type->i_mutex_dir_key#5){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 #1: 00000000b205b3ca (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:365 1 lock held by syz-executor6/10853: #0: 00000000595899f0 (&type->i_mutex_dir_key#5){++++}, at: inode_lock_shared include/linux/fs.h:748 [inline] #0: 00000000595899f0 (&type->i_mutex_dir_key#5){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 792 Comm: khungtaskd Not tainted 4.19.0-rc1+ #214 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x1040 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:56