gfs2: not a GFS2 filesystem gfs2: not a GFS2 filesystem kworker/dying (7097) used greatest stack depth: 12312 bytes left INFO: task syz-executor1:29076 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #143 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D24752 29076 4592 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xaa/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:715 [inline] vfs_setxattr+0x96/0x100 fs/xattr.c:219 setxattr+0x2ea/0x450 fs/xattr.c:451 path_setxattr+0x1e3/0x230 fs/xattr.c:470 __do_sys_setxattr fs/xattr.c:485 [inline] __se_sys_setxattr fs/xattr.c:481 [inline] __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:481 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a79 Code: 0f 0b e8 5a 44 fd ff 0f 0b e8 c3 44 fd ff 0f 0b e8 4c 44 fd ff 0f 0b e8 05 68 fd ff 48 8d 05 a4 9a 48 00 48 89 04 24 48 c7 44 <24> 08 1d 00 00 00 e8 8c 71 fd ff e8 37 6a fd ff 0f b6 44 24 2f 83 RSP: 002b:00007f4749c49c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007f4749c4a6d4 RCX: 0000000000455a79 RDX: 0000000020000500 RSI: 0000000020000580 RDI: 0000000020000540 RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bbbe9 R14: 00000000004d3170 R15: 0000000000000001 INFO: task syz-executor1:29077 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #143 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D24216 29077 4592 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xaa/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:715 [inline] lock_mount+0x8c/0x2e0 fs/namespace.c:2088 do_add_mount+0x27/0x370 fs/namespace.c:2465 do_new_mount fs/namespace.c:2532 [inline] do_mount+0x193f/0x30e0 fs/namespace.c:2848 ksys_mount+0x12d/0x140 fs/namespace.c:3064 __do_sys_mount fs/namespace.c:3078 [inline] __se_sys_mount fs/namespace.c:3075 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a79 Code: 0f 0b e8 5a 44 fd ff 0f 0b e8 c3 44 fd ff 0f 0b e8 4c 44 fd ff 0f 0b e8 05 68 fd ff 48 8d 05 a4 9a 48 00 48 89 04 24 48 c7 44 <24> 08 1d 00 00 00 e8 8c 71 fd ff e8 37 6a fd ff 0f b6 44 24 2f 83 RSP: 002b:00007f4749c28c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f4749c296d4 RCX: 0000000000455a79 RDX: 0000000020000900 RSI: 0000000020000380 RDI: 0000000000000000 RBP: 000000000072bff0 R08: 0000000020000840 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c01c1 R14: 00000000004cfe10 R15: 0000000000000002 Showing all locks held in the system: 1 lock held by khungtaskd/901: #0: 000000003d0a6bc2 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4461 2 locks held by udevd/2418: 1 lock held by rsyslogd/4449: #0: 0000000089ae65e2 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/4539: #0: 00000000d5bfa37e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000211bc2fb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4540: #0: 0000000045dc6448 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000da15b7d7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4541: #0: 00000000856f1ed6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000000a67fa23 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4542: #0: 0000000051453986 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000f5f16a2e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4543: #0: 000000009e09b1a2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000e7d29864 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4544: #0: 0000000082809494 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000ad535649 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4545: #0: 00000000f573fb78 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000eac69b86 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by syz-executor1/29026: #0: 000000009046acf3 (sb_writers#17){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 000000009046acf3 (sb_writers#17){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000b6dae446 (&sb->s_type->i_mutex_key#19){+.+.}, at: inode_lock include/linux/fs.h:715 [inline] #1: 00000000b6dae446 (&sb->s_type->i_mutex_key#19){+.+.}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:219 2 locks held by syz-executor1/29076: #0: 000000009046acf3 (sb_writers#17){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 000000009046acf3 (sb_writers#17){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000b6dae446 (&sb->s_type->i_mutex_key#19){+.+.}, at: inode_lock include/linux/fs.h:715 [inline] #1: 00000000b6dae446 (&sb->s_type->i_mutex_key#19){+.+.}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:219 1 lock held by syz-executor1/29077: #0: 00000000b6dae446 (&sb->s_type->i_mutex_key#19){+.+.}, at: inode_lock include/linux/fs.h:715 [inline] #0: 00000000b6dae446 (&sb->s_type->i_mutex_key#19){+.+.}, at: lock_mount+0x8c/0x2e0 fs/namespace.c:2088 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc4+ #143 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.4+0x19/0xce lib/nmi_backtrace.c:103 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:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x9c4/0xf80 kernel/hung_task.c:252 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2418 Comm: udevd Not tainted 4.18.0-rc4+ #143 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:INIT_LIST_HEAD include/linux/list.h:29 [inline] RIP: 0010:list_del_init include/linux/list.h:160 [inline] RIP: 0010:ep_send_events_proc+0x317/0xf00 fs/eventpoll.c:1654 Code: 04 20 00 48 89 d8 48 c1 e8 03 49 89 9d 00 fe ff ff 42 80 3c 20 00 0f 85 0c 0a 00 00 4c 89 f0 49 c1 ef 03 48 89 1b 48 c1 e8 03 <43> c6 04 27 f8 42 80 3c 20 00 0f 85 6a 09 00 00 48 89 5b 08 48 8b RSP: 0018:ffff8801ca09f360 EFLAGS: 00000a06 RAX: 1ffff10039429524 RBX: ffff8801ca14a918 RCX: 1ffff10039413edd RDX: 0000000000000000 RSI: ffffffff81da1aed RDI: ffff8801ca09f6f0 RBP: ffff8801ca09f658 R08: ffff8801ca096040 R09: 0000000000000006 R10: ffff8801ca096040 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8801ca09f630 R14: ffff8801ca14a920 R15: 1ffff10039413e86 FS: 00007f9e00b4c7a0(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001ca79c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ep_scan_ready_list+0x3c5/0xf50 fs/eventpoll.c:699 ep_send_events fs/eventpoll.c:1706 [inline] ep_poll+0x3ef/0x1210 fs/eventpoll.c:1832 do_epoll_wait+0x1b0/0x200 fs/eventpoll.c:2190 __do_sys_epoll_wait fs/eventpoll.c:2200 [inline] __se_sys_epoll_wait fs/eventpoll.c:2197 [inline] __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2197 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9e00260943 Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 RSP: 002b:00007fff9003a828 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f9e00260943 RDX: 0000000000000008 RSI: 00007fff9003a920 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000025d65c0 R15: 00000000025c4250