[ 39.950506][ T26] audit: type=1800 audit(1574825285.521:26): pid=7718 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.981055][ T26] audit: type=1800 audit(1574825285.531:27): pid=7718 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 40.025695][ T26] audit: type=1800 audit(1574825285.531:28): pid=7718 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.763252][ T26] audit: type=1800 audit(1574825286.381:29): pid=7718 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.061825][ T7870] [EXFAT] trying to mount... [ 54.066694][ T7870] ------------[ cut here ]------------ [ 54.072395][ T7870] [EXFAT] No bh, device seems wrong or to be ejected. [ 54.079425][ T7870] WARNING: CPU: 0 PID: 7870 at drivers/staging/exfat/exfat_blkdev.c:63 bdev_read+0x1ea/0x250 [ 54.089601][ T7870] Kernel panic - not syncing: panic_on_warn set ... [ 54.096175][ T7870] CPU: 0 PID: 7870 Comm: syz-executor973 Not tainted 5.4.0-syzkaller #0 [ 54.104472][ T7870] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.114507][ T7870] Call Trace: [ 54.117829][ T7870] dump_stack+0x1fb/0x318 [ 54.122149][ T7870] panic+0x264/0x7a9 [ 54.126062][ T7870] ? __warn+0x105/0x210 [ 54.130216][ T7870] ? bdev_read+0x1ea/0x250 [ 54.134612][ T7870] __warn+0x20e/0x210 [ 54.138571][ T7870] ? bdev_read+0x1ea/0x250 [ 54.142973][ T7870] report_bug+0x1b6/0x2f0 [ 54.147336][ T7870] ? bdev_read+0x1ea/0x250 [ 54.151733][ T7870] do_error_trap+0xd7/0x440 [ 54.156218][ T7870] do_invalid_op+0x36/0x40 [ 54.160645][ T7870] ? bdev_read+0x1ea/0x250 [ 54.165037][ T7870] invalid_op+0x23/0x30 [ 54.169168][ T7870] RIP: 0010:bdev_read+0x1ea/0x250 [ 54.174167][ T7870] Code: c9 d1 fb b8 01 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 84 c9 d1 fb 48 c7 c7 70 74 72 88 31 c0 e8 a6 66 a4 fb <0f> 0b eb d5 89 d9 80 e1 07 38 c1 0f 8c 7a fe ff ff 48 89 df e8 4d [ 54.193832][ T7870] RSP: 0018:ffff888098c97780 EFLAGS: 00010246 [ 54.199870][ T7870] RAX: adafa80d9b268800 RBX: 0000000000000000 RCX: ffff88808cfc0400 [ 54.207818][ T7870] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 54.215766][ T7870] RBP: ffff888098c977c0 R08: ffffffff815d8ce4 R09: ffffed1015d461d8 [ 54.223712][ T7870] R10: ffffed1015d461d8 R11: 0000000000000000 R12: ffff88808dac0094 [ 54.232837][ T7870] R13: ffff88808dac8174 R14: ffff888098c97950 R15: 1ffff11013192f2a [ 54.240969][ T7870] ? vprintk_emit+0x2d4/0x3a0 [ 54.245714][ T7870] sector_read+0x120/0x320 [ 54.250977][ T7870] exfat_fill_super+0x11c3/0x27a0 [ 54.255986][ T7870] ? __kasan_check_read+0x11/0x20 [ 54.260985][ T7870] ? mark_lock+0x107/0x1650 [ 54.265464][ T7870] ? __lock_acquire+0xc75/0x1be0 [ 54.270388][ T7870] ? widen_string+0x40/0x390 [ 54.274983][ T7870] ? string+0x2c7/0x2e0 [ 54.279216][ T7870] ? bdev_name+0x2a6/0x3b0 [ 54.283612][ T7870] ? pointer+0x52b/0xb50 [ 54.287831][ T7870] ? vsnprintf+0x1b6e/0x1c00 [ 54.292399][ T7870] ? snprintf+0x6f/0x90 [ 54.303039][ T7870] ? __kasan_check_write+0x14/0x20 [ 54.308125][ T7870] ? set_blocksize+0x15d/0x3a0 [ 54.312964][ T7870] ? sb_set_blocksize+0xb7/0xf0 [ 54.317789][ T7870] mount_bdev+0x27c/0x390 [ 54.322103][ T7870] ? exfat_fs_mount+0x40/0x40 [ 54.326753][ T7870] exfat_fs_mount+0x34/0x40 [ 54.331331][ T7870] legacy_get_tree+0xf9/0x1a0 [ 54.336618][ T7870] ? tm_current+0x550/0x550 [ 54.345709][ T7870] vfs_get_tree+0x8b/0x2a0 [ 54.351368][ T7870] do_mount+0x16c0/0x2510 [ 54.356208][ T7870] ? copy_mount_options+0xdc/0x3c0 [ 54.361374][ T7870] ksys_mount+0xcc/0x100 [ 54.366112][ T7870] __x64_sys_mount+0xbf/0xd0 [ 54.371286][ T7870] do_syscall_64+0xf7/0x1c0 [ 54.375995][ T7870] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.381867][ T7870] RIP: 0033:0x440239 [ 54.386094][ T7870] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 54.405765][ T7870] RSP: 002b:00007ffde1516da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 54.414152][ T7870] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440239 [ 54.422110][ T7870] RDX: 0000000020000080 RSI: 0000000020000100 RDI: 0000000020000140 [ 54.430067][ T7870] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 54.438021][ T7870] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ac0 [ 54.446004][ T7870] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 54.455179][ T7870] Kernel Offset: disabled [ 54.459570][ T7870] Rebooting in 86400 seconds..