EXT4-fs (loop1): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop1): couldn't mount as ext3 due to feature incompatibilities hfsplus: unable to find HFS+ superblock INFO: task syz-executor0:12630 blocked for more than 140 seconds. Not tainted 4.18.0-rc4+ #138 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D25528 12630 4601 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: 0033:0x455e29 Code: cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 ab 04 00 00 48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 44 24 60 c6 00 00 <48> 8b 4c 24 68 48 89 ca 48 89 50 08 48 8b 59 20 48 01 da 31 db 31 RSP: 002b:00007fdba1276c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007fdba12776d4 RCX: 0000000000455e29 RDX: 0000000020000400 RSI: 0000000020000380 RDI: 0000000020000140 RBP: 000000000072c098 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bbff8 R14: 00000000004d3370 R15: 0000000000000003 Showing all locks held in the system: 1 lock held by khungtaskd/903: #0: 00000000cc330999 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4461 1 lock held by rsyslogd/4460: 2 locks held by getty/4550: #0: 00000000547fec92 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000c1c12ad8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4551: #0: 000000007e040e22 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000004842d379 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4552: #0: 0000000066ed78da (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000039e9e82b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4553: #0: 00000000f39e8570 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000093bdbe91 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4554: #0: 0000000059b6aede (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000ae37c2ec (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4555: #0: 000000005370d563 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000007950ede5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4556: #0: 00000000ab682db0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000767a7a9e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by syz-executor0/12581: #0: 00000000de9ac19e (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000de9ac19e (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 0000000039bdddbd (&sb->s_type->i_mutex_key#18){+.+.}, at: inode_lock include/linux/fs.h:715 [inline] #1: 0000000039bdddbd (&sb->s_type->i_mutex_key#18){+.+.}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:219 2 locks held by syz-executor0/12630: #0: 00000000de9ac19e (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 00000000de9ac19e (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 0000000039bdddbd (&sb->s_type->i_mutex_key#18){+.+.}, at: inode_lock include/linux/fs.h:715 [inline] #1: 0000000039bdddbd (&sb->s_type->i_mutex_key#18){+.+.}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:219 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 903 Comm: khungtaskd Not tainted 4.18.0-rc4+ #138 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: 2419 Comm: udevd Not tainted 4.18.0-rc4+ #138 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mark_lock+0x1/0x19f0 kernel/locking/lockdep.c:3118 Code: be d3 00 00 48 8d 65 d8 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b e8 ed 5e 5b 00 eb d8 e8 06 5f 5b 00 eb 87 0f 1f 40 00 55 <41> 89 d0 49 89 fa 48 ba 00 00 00 00 00 fc ff df 44 89 c1 48 89 e5 RSP: 0018:ffff8801ca0a72d0 EFLAGS: 00000002 RAX: 000000000000000e RBX: 0000000000000039 RCX: 0000000000000002 RDX: 0000000000000008 RSI: ffff8801ca09e8b8 RDI: ffff8801ca09e080 RBP: ffff8801ca0a7668 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8801ca09e8b8 R11: ffff8801ca09e8a4 R12: ffff8801ca09e8da R13: 0000000000000000 R14: ffff8801ca09e080 R15: 000000000000000e FS: 00007f5de27a87a0(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001ca7d9000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] ktime_get_ts64+0x14f/0x530 kernel/time/timekeeping.c:876 select_estimate_accuracy+0xde/0x4b0 fs/select.c:87 ep_poll+0x5e2/0x1210 fs/eventpoll.c:1750 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: 0033:0x7f5de1ebc943 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:00007ffcc7e3bd38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f5de1ebc943 RDX: 0000000000000008 RSI: 00007ffcc7e3be30 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000001078c30 R15: 0000000001078250 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.089 msecs