[ 39.176731][ T26] audit: type=1800 audit(1571700023.836:27): pid=7719 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 39.212179][ T26] audit: type=1800 audit(1571700023.836:28): pid=7719 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. [ 39.968769][ T26] audit: type=1800 audit(1571700024.676:29): pid=7719 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 39.988332][ T26] audit: type=1800 audit(1571700024.676:30): pid=7719 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.222' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.579178][ T7870] [EXFAT] trying to mount... [ 47.584464][ T2500] blk_update_request: I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 47.595456][ T7870] ------------[ cut here ]------------ [ 47.600954][ T7870] [EXFAT] No bh, device seems wrong or to be ejected. [ 47.608320][ T7870] WARNING: CPU: 1 PID: 7870 at drivers/staging/exfat/exfat_blkdev.c:63 bdev_read+0x1ea/0x250 [ 47.618509][ T7870] Kernel panic - not syncing: panic_on_warn set ... [ 47.625113][ T7870] CPU: 1 PID: 7870 Comm: syz-executor877 Not tainted 5.4.0-rc4 #0 [ 47.632889][ T7870] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.642917][ T7870] Call Trace: [ 47.646186][ T7870] dump_stack+0x1d8/0x2f8 [ 47.650488][ T7870] panic+0x264/0x7a9 [ 47.654398][ T7870] ? __warn+0x105/0x210 [ 47.658564][ T7870] ? bdev_read+0x1ea/0x250 [ 47.662998][ T7870] __warn+0x20e/0x210 [ 47.666956][ T7870] ? bdev_read+0x1ea/0x250 [ 47.671345][ T7870] report_bug+0x1b6/0x2f0 [ 47.675681][ T7870] ? bdev_read+0x1ea/0x250 [ 47.680070][ T7870] do_error_trap+0xd7/0x440 [ 47.684555][ T7870] do_invalid_op+0x36/0x40 [ 47.688969][ T7870] ? bdev_read+0x1ea/0x250 [ 47.693356][ T7870] invalid_op+0x23/0x30 [ 47.697487][ T7870] RIP: 0010:bdev_read+0x1ea/0x250 [ 47.703701][ T7870] Code: 28 d4 fb b8 01 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 44 28 d4 fb 48 c7 c7 50 c6 51 88 31 c0 e8 66 cc a6 fb <0f> 0b eb d5 89 d9 80 e1 07 38 c1 0f 8c 7a fe ff ff 48 89 df e8 0d [ 47.723278][ T7870] RSP: 0018:ffff8880997e7780 EFLAGS: 00010246 [ 47.729316][ T7870] RAX: 089d24483bf9d000 RBX: 0000000000000000 RCX: ffff8880917da240 [ 47.737259][ T7870] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 47.745206][ T7870] RBP: ffff8880997e77c0 R08: ffffffff815c8244 R09: ffffed1015d66120 [ 47.753150][ T7870] R10: ffffed1015d66120 R11: 0000000000000000 R12: ffff88808f480094 [ 47.761093][ T7870] R13: ffff88808f488174 R14: ffff8880997e7950 R15: 1ffff110132fcf2a [ 47.769054][ T7870] ? vprintk_emit+0x2d4/0x3a0 [ 47.773713][ T7870] sector_read+0x120/0x320 [ 47.778112][ T7870] exfat_fill_super+0x11c3/0x27a0 [ 47.783119][ T7870] ? __kasan_check_read+0x11/0x20 [ 47.788116][ T7870] ? mark_lock+0x107/0x1650 [ 47.792594][ T7870] ? __lock_acquire+0xc75/0x1be0 [ 47.797508][ T7870] ? widen_string+0x40/0x390 [ 47.802083][ T7870] ? string+0x2c7/0x2e0 [ 47.806216][ T7870] ? bdev_name+0x2a6/0x3b0 [ 47.810607][ T7870] ? pointer+0x1d3/0x9d0 [ 47.814842][ T7870] ? vsnprintf+0x1b6e/0x1c00 [ 47.819425][ T7870] ? snprintf+0x6f/0x90 [ 47.823566][ T7870] ? __kasan_check_write+0x14/0x20 [ 47.828751][ T7870] ? set_blocksize+0x15d/0x3a0 [ 47.833504][ T7870] ? sb_set_blocksize+0xb7/0xf0 [ 47.838330][ T7870] mount_bdev+0x27c/0x390 [ 47.842634][ T7870] ? exfat_fs_mount+0x40/0x40 [ 47.847287][ T7870] exfat_fs_mount+0x34/0x40 [ 47.851781][ T7870] legacy_get_tree+0xf9/0x1a0 [ 47.856440][ T7870] ? tm_current+0x550/0x550 [ 47.860927][ T7870] vfs_get_tree+0x8b/0x2a0 [ 47.865338][ T7870] do_mount+0x16c0/0x2510 [ 47.869652][ T7870] ? copy_mount_options+0xdc/0x3c0 [ 47.874758][ T7870] ksys_mount+0xcc/0x100 [ 47.879001][ T7870] __x64_sys_mount+0xbf/0xd0 [ 47.883573][ T7870] do_syscall_64+0xf7/0x1c0 [ 47.888060][ T7870] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.893927][ T7870] RIP: 0033:0x440179 [ 47.897793][ 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 [ 47.917372][ T7870] RSP: 002b:00007ffeb5e7eeb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 47.925777][ T7870] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440179 [ 47.933729][ T7870] RDX: 0000000020000200 RSI: 00000000200001c0 RDI: 0000000020000400 [ 47.941680][ T7870] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 47.949624][ T7870] R10: 0000000002800001 R11: 0000000000000246 R12: 0000000000401a00 [ 47.957571][ T7870] R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 [ 47.966379][ T7870] Kernel Offset: disabled [ 47.970763][ T7870] Rebooting in 86400 seconds..