audit: type=1800 audit(1545699565.147:32): pid=9830 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor0" name="bus" dev="sda1" ino=16585 res=0 usb usb1: usbfs: process 9837 (syz-executor1) did not claim interface 0 before use INFO: task syz-executor0:9784 blocked for more than 140 seconds. Not tainted 4.20.0 #387 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D23160 9784 7903 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 blkdev_put+0x34/0x540 fs/block_dev.c:1816 blkdev_close+0x8b/0xb0 fs/block_dev.c:1865 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411211 Code: 44 00 ff 15 79 80 24 00 85 c0 41 89 c6 75 83 4c 8b 54 24 28 41 c7 44 24 60 01 00 00 00 49 83 c2 01 4c 89 54 24 28 e9 6f fa ff 49 8b 7c 24 70 8b 35 43 c4 24 00 ff 15 ed 83 24 00 85 c0 0f 85 RSP: 002b:00007fff28859070 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000411211 RDX: 0000000000000000 RSI: 0000000000741be8 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000741be0 R09: 0000000000000000 R10: 00007fff28858f90 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000008 R15: 0000000000000000 INFO: task syz-executor0:9797 blocked for more than 140 seconds. Not tainted 4.20.0 #387 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D22568 9797 7903 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466 blkdev_get+0xc1/0xb50 fs/block_dev.c:1617 blkdev_open+0x1fb/0x280 fs/block_dev.c:1775 do_dentry_open+0x499/0x1250 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bc/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: 0033:0x411391 Code: c0 89 c5 74 24 48 83 7b 08 00 74 0a 48 8d 7b 08 ff 15 db 81 24 00 48 83 3b 00 74 c1 48 89 df ff 15 6c 81 24 00 eb b6 66 90 48 <8b> 35 b1 c2 24 00 48 8b 3b ff 15 68 81 24 00 85 c0 89 c5 75 c6 48 RSP: 002b:00007fb0534b3a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000200001e8 RCX: 0000000000411391 RDX: 00007fb0534b3afa RSI: 0000000000000002 RDI: 00007fb0534b3af0 RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000009 R13: 0000000000000001 R14: 00000000004da920 R15: 00000000ffffffff INFO: task syz-executor5:9793 blocked for more than 140 seconds. Not tainted 4.20.0 #387 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D21960 9793 8062 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline] rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x9b/0x120 kernel/locking/rwsem.c:26 __get_super.part.11+0x207/0x2e0 fs/super.c:698 __get_super include/linux/spinlock.h:329 [inline] get_super+0x2d/0x50 fs/super.c:727 fsync_bdev+0x17/0xc0 fs/block_dev.c:469 invalidate_partition+0x35/0x60 block/genhd.c:1570 drop_partitions.isra.14+0xe1/0x200 block/partition-generic.c:445 rescan_partitions+0x72/0x8e0 block/partition-generic.c:518 __blkdev_reread_part+0x1ad/0x230 block/ioctl.c:173 blkdev_reread_part+0x26/0x40 block/ioctl.c:193 loop_reread_partitions+0x163/0x190 drivers/block/loop.c:644 loop_set_status+0xb95/0x1010 drivers/block/loop.c:1198 loop_set_status64+0xaa/0x100 drivers/block/loop.c:1316 lo_ioctl+0x90e/0x1d60 drivers/block/loop.c:1432 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0xd8a/0x21b0 block/ioctl.c:605 block_ioctl+0xee/0x130 fs/block_dev.c:1883 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457759 Code: Bad RIP value. RSP: 002b:00007f3104526c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457759 RDX: 0000000020000380 RSI: 0000000000004c04 RDI: 000000000000000e RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f31045276d4 R13: 00000000004c0b14 R14: 00000000004d2358 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1023: #0: 00000000f7399fb9 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 1 lock held by rsyslogd/7779: #0: 00000000ba64f59c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/7869: #0: 0000000092ec9df2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000ac4f63f8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7870: #0: 0000000082c6fbac (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000002926ca0a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7871: #0: 00000000dca55462 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000c2c1cd43 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7872: #0: 0000000033e8f64a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000acf18521 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7873: #0: 00000000924e699f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000032bb4936 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7874: #0: 0000000080a0b1fc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000008ea24eae (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7875: #0: 000000006ce7c504 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000001ed7d9e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 1 lock held by syz-executor0/9784: #0: 0000000086e5ea64 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1816 1 lock held by syz-executor0/9785: 1 lock held by syz-executor0/9797: #0: 0000000086e5ea64 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466 3 locks held by syz-executor5/9793: #0: 00000000b5e344cb (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8e/0x1d60 drivers/block/loop.c:1402 #1: 0000000086e5ea64 (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 #2: 0000000013f3f56a (&type->s_umount_key#47){.+.+}, at: __get_super.part.11+0x207/0x2e0 fs/super.c:698 1 lock held by blkid/9795: #0: 0000000086e5ea64 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1816 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1023 Comm: khungtaskd Not tainted 4.20.0 #387 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+0x1d3/0x2c6 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1c2/0x22c 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xb51/0x1060 kernel/hung_task.c:289 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.129 msecs NMI backtrace for cpu 1 CPU: 1 PID: 9785 Comm: syz-executor0 Not tainted 4.20.0 #387 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:101 Code: 5d c3 66 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 18 95 83 7e 81 e2 00 01 1f 00 75 2b 8b 90 d8 12 00 00 <83> fa 02 75 20 48 8b 88 e0 12 00 00 8b 80 dc 12 00 00 48 8b 11 48 RSP: 0018:ffff88817ec4f1e8 EFLAGS: 00000246 RAX: ffff88817ec42100 RBX: 0000000000000074 RCX: ffffffff81de750b RDX: 0000000000000002 RSI: ffffffff81de751e RDI: 0000000000000006 RBP: ffff88817ec4f1e8 R08: ffff88817ec42100 R09: ffffed103b5e5b77 R10: 0000000000000002 R11: ffff8881daf2dbbb R12: 0000000000000001 R13: ffffea0006aff3c0 R14: 0000000000000004 R15: dffffc0000000000 FS: 00007fb0534d5700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001c60ac000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: grow_dev_page fs/buffer.c:981 [inline] grow_buffers fs/buffer.c:1016 [inline] __getblk_slow fs/buffer.c:1043 [inline] __getblk_gfp+0x87e/0xd50 fs/buffer.c:1320 __bread_gfp+0x2d/0x300 fs/buffer.c:1354 sb_bread include/linux/buffer_head.h:307 [inline] fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101 fat_get_entry fs/fat/dir.c:129 [inline] fat_get_short_entry+0x13c/0x2c0 fs/fat/dir.c:878 fat_subdirs+0x142/0x290 fs/fat/dir.c:944 fat_read_root fs/fat/inode.c:1416 [inline] fat_fill_super+0x2a9f/0x4310 fs/fat/inode.c:1851 msdos_fill_super+0x2e/0x40 fs/fat/namei_msdos.c:652 mount_bdev+0x30c/0x3e0 fs/super.c:1158 msdos_mount+0x34/0x40 fs/fat/namei_msdos.c:659 mount_fs+0xae/0x31d fs/super.c:1261 vfs_kern_mount.part.35+0xdc/0x4f0 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x581/0x31f0 fs/namespace.c:2801 ksys_mount+0x12d/0x140 fs/namespace.c:3017 __do_sys_mount fs/namespace.c:3031 [inline] __se_sys_mount fs/namespace.c:3028 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3028 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a1ca Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fb0534d4a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb0534d4b30 RCX: 000000000045a1ca RDX: 00007fb0534d4ad0 RSI: 0000000020000100 RDI: 00007fb0534d4af0 RBP: 0000000020000100 R08: 00007fb0534d4b30 R09: 00007fb0534d4ad0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000004 R13: 0000000000000000 R14: 00000000004da920 R15: 00000000ffffffff