input:  as /devices/virtual/input/input812 FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop0): bogus number of reserved sectors FAT-fs (loop0): Can't find a valid FAT filesystem INFO: task syz-executor0:28343 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #60 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D23064 28343 26452 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 fanotify_get_response fs/notify/fanotify/fanotify.c:68 [inline] fanotify_handle_event+0x7fb/0x9a0 fs/notify/fanotify/fanotify.c:245 send_to_group fs/notify/fsnotify.c:234 [inline] fsnotify+0x87f/0x12f0 fs/notify/fsnotify.c:367 fsnotify_perm include/linux/fsnotify.h:52 [inline] security_file_open+0x16f/0x1b0 security/security.c:986 do_dentry_open+0x331/0x1250 fs/open.c:758 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bf/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 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: 0033:0x457569 Code: Bad RIP value. RSP: 002b:00007f92d5f39c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020021000 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92d5f3a6d4 R13: 00000000004ef97f R14: 00000000004d3fd8 R15: 00000000ffffffff INFO: task syz-executor0:28351 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #60 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D23128 28351 26452 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 fanotify_get_response fs/notify/fanotify/fanotify.c:68 [inline] fanotify_handle_event+0x7fb/0x9a0 fs/notify/fanotify/fanotify.c:245 send_to_group fs/notify/fsnotify.c:234 [inline] fsnotify+0x87f/0x12f0 fs/notify/fsnotify.c:367 fsnotify_perm include/linux/fsnotify.h:52 [inline] security_file_open+0x16f/0x1b0 security/security.c:986 do_dentry_open+0x331/0x1250 fs/open.c:758 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bf/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 ksys_open include/linux/syscalls.h:1276 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: Bad RIP value. RSP: 002b:00007f92d5f18c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92d5f196d4 R13: 00000000004bdb2f R14: 00000000004cc688 R15: 00000000ffffffff INFO: task syz-executor0:28372 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #60 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D25368 28372 26452 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 fanotify_get_response fs/notify/fanotify/fanotify.c:68 [inline] fanotify_handle_event+0x7fb/0x9a0 fs/notify/fanotify/fanotify.c:245 send_to_group fs/notify/fsnotify.c:234 [inline] fsnotify+0x87f/0x12f0 fs/notify/fsnotify.c:367 fsnotify_perm include/linux/fsnotify.h:52 [inline] security_file_open+0x16f/0x1b0 security/security.c:986 do_dentry_open+0x331/0x1250 fs/open.c:758 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bf/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 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: 0033:0x457569 Code: Bad RIP value. RSP: 002b:00007f92d5ed6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 00000000200001c0 RBP: 000000000072c180 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92d5ed76d4 R13: 00000000004ef97f R14: 00000000004d3fd8 R15: 00000000ffffffff INFO: task syz-executor0:28375 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #60 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D25352 28375 26452 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 fanotify_get_response fs/notify/fanotify/fanotify.c:68 [inline] fanotify_handle_event+0x7fb/0x9a0 fs/notify/fanotify/fanotify.c:245 send_to_group fs/notify/fsnotify.c:234 [inline] fsnotify+0x87f/0x12f0 fs/notify/fsnotify.c:367 fsnotify_perm include/linux/fsnotify.h:52 [inline] security_file_open+0x16f/0x1b0 security/security.c:986 do_dentry_open+0x331/0x1250 fs/open.c:758 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bf/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 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: 0033:0x457569 Code: Bad RIP value. RSP: 002b:00007f92d5e94c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000020000140 RDI: ffffffffffffff9c RBP: 000000000072c2c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92d5e956d4 R13: 00000000004c2b6b R14: 00000000004d41b8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/982: #0: 0000000036c49b8d (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4435 1 lock held by udevd/3195: 1 lock held by rsyslogd/5286: #0: 00000000bdd26fb0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/5377: #0: 00000000dc5fa640 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000005c3485e6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5378: #0: 00000000462b2833 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000326fc091 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5379: #0: 00000000226cd7e3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000006caf2e2d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5380: #0: 00000000be8d6659 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000f3b207ae (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5381: #0: 000000009e897577 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000566b759e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5382: #0: 000000008c8c6b5b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000abba4579 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5383: #0: 00000000494e1670 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000a22afaf9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 1 lock held by syz-executor0/28351: #0: 00000000bf8b0a08 (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 00000000bf8b0a08 (sb_writers#3){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 982 Comm: khungtaskd Not tainted 4.19.0-rc7+ #60 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+0x1c4/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed 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+0xb3e/0x1050 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 CPU: 0 PID: 3195 Comm: udevd Not tainted 4.19.0-rc7+ #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x16/0x20 kernel/kcov.c:188 Code: 48 89 e5 48 8b 4d 08 e8 88 fe ff ff 5d c3 66 0f 1f 44 00 00 55 89 f2 89 fe bf 05 00 00 00 48 89 e5 48 8b 4d 08 e8 6a fe ff ff <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 f2 48 89 fe bf 07 00 00 00 RSP: 0018:ffff8801c79a76e0 EFLAGS: 00000093 RAX: 0000000000000000 RBX: 1ffff10038f34ee1 RCX: ffffffff8184b8a5 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8801c79a76e0 R08: ffff8801c7998180 R09: 000000000000000a R10: ffffed00390e0a10 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000078 R14: ffffffff8931f200 R15: ffff8801c79a78e8 FS: 00007fca912a47a0(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001c7f53000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_off+0xa5/0x310 kernel/trace/trace_preemptirq.c:39 seqcount_lockdep_reader_access include/linux/seqlock.h:80 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] ktime_get_ts64+0x124/0x530 kernel/time/timekeeping.c:886 select_estimate_accuracy+0xde/0x4b0 fs/select.c:87 ep_poll+0x6d9/0x13d0 fs/eventpoll.c:1758 do_epoll_wait+0x1b0/0x200 fs/eventpoll.c:2198 __do_sys_epoll_wait fs/eventpoll.c:2208 [inline] __se_sys_epoll_wait fs/eventpoll.c:2205 [inline] __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2205 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fca909b8943 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:00007ffff0b40c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007fca909b8943 RDX: 0000000000000008 RSI: 00007ffff0b40d70 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000e0f400 R15: 0000000000dfd250