[ 41.781346][ T26] audit: type=1800 audit(1574485990.724:25): pid=7785 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 41.805951][ T26] audit: type=1800 audit(1574485990.724:26): pid=7785 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 41.839278][ T26] audit: type=1800 audit(1574485990.734:27): pid=7785 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 41.860844][ T26] audit: type=1800 audit(1574485990.734:28): pid=7785 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.199' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.679435][ T7939] [EXFAT] trying to mount... [ 68.684843][ T2506] block nbd0: Attempted send on invalid socket [ 68.691506][ T2506] blk_update_request: I/O error, dev nbd0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 68.702998][ T7939] ------------[ cut here ]------------ [ 68.708627][ T7939] [EXFAT] No bh, device seems wrong or to be ejected. [ 68.715532][ T7939] WARNING: CPU: 1 PID: 7939 at drivers/staging/exfat/exfat_blkdev.c:63 bdev_read+0x1ea/0x250 [ 68.725753][ T7939] Kernel panic - not syncing: panic_on_warn set ... [ 68.732500][ T7939] CPU: 1 PID: 7939 Comm: syz-executor679 Not tainted 5.4.0-rc8-syzkaller #0 [ 68.741245][ T7939] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.751291][ T7939] Call Trace: [ 68.754565][ T7939] dump_stack+0x1fb/0x318 [ 68.758891][ T7939] panic+0x264/0x7a9 [ 68.762762][ T7939] ? __warn+0x105/0x210 [ 68.767006][ T7939] ? bdev_read+0x1ea/0x250 [ 68.771401][ T7939] __warn+0x20e/0x210 [ 68.775359][ T7939] ? bdev_read+0x1ea/0x250 [ 68.779778][ T7939] report_bug+0x1b6/0x2f0 [ 68.784093][ T7939] ? bdev_read+0x1ea/0x250 [ 68.788491][ T7939] do_error_trap+0xd7/0x440 [ 68.793075][ T7939] do_invalid_op+0x36/0x40 [ 68.797468][ T7939] ? bdev_read+0x1ea/0x250 [ 68.801865][ T7939] invalid_op+0x23/0x30 [ 68.805999][ T7939] RIP: 0010:bdev_read+0x1ea/0x250 [ 68.811031][ T7939] Code: df d3 fb b8 01 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 74 df d3 fb 48 c7 c7 70 e3 51 88 31 c0 e8 a6 75 a6 fb <0f> 0b eb d5 89 d9 80 e1 07 38 c1 0f 8c 7a fe ff ff 48 89 df e8 9d [ 68.830624][ T7939] RSP: 0018:ffff8880a3b3f780 EFLAGS: 00010246 [ 68.836775][ T7939] RAX: b06572df3cda9900 RBX: 0000000000000000 RCX: ffff8880a3cc2640 [ 68.844745][ T7939] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 68.852700][ T7939] RBP: ffff8880a3b3f7c0 R08: ffffffff815cc0f4 R09: ffffed1015d640d2 [ 68.860892][ T7939] R10: ffffed1015d640d2 R11: 0000000000000000 R12: ffff88808e0c0094 [ 68.868850][ T7939] R13: ffff88808e0c8174 R14: ffff8880a3b3f950 R15: 1ffff11014767f2a [ 68.876916][ T7939] ? vprintk_emit+0x2d4/0x3a0 [ 68.881578][ T7939] sector_read+0x120/0x320 [ 68.885976][ T7939] exfat_fill_super+0x11c3/0x27a0 [ 68.891253][ T7939] ? __kasan_check_read+0x11/0x20 [ 68.896254][ T7939] ? mark_lock+0x107/0x1650 [ 68.900827][ T7939] ? __lock_acquire+0xc75/0x1be0 [ 68.905745][ T7939] ? widen_string+0x40/0x390 [ 68.910326][ T7939] ? string+0x2c7/0x2e0 [ 68.914460][ T7939] ? bdev_name+0x2a6/0x3b0 [ 68.918957][ T7939] ? pointer+0x1d3/0x9d0 [ 68.923180][ T7939] ? vsnprintf+0x1b6e/0x1c00 [ 68.927934][ T7939] ? snprintf+0x6f/0x90 [ 68.932063][ T7939] ? __kasan_check_write+0x14/0x20 [ 68.937158][ T7939] ? set_blocksize+0x15d/0x3a0 [ 68.941896][ T7939] ? sb_set_blocksize+0xb7/0xf0 [ 68.946723][ T7939] mount_bdev+0x27c/0x390 [ 68.951114][ T7939] ? exfat_fs_mount+0x40/0x40 [ 68.956076][ T7939] exfat_fs_mount+0x34/0x40 [ 68.960561][ T7939] legacy_get_tree+0xf9/0x1a0 [ 68.965211][ T7939] ? tm_current+0x550/0x550 [ 68.969693][ T7939] vfs_get_tree+0x8b/0x2a0 [ 68.974103][ T7939] do_mount+0x16c0/0x2510 [ 68.978601][ T7939] ? copy_mount_options+0xdc/0x3c0 [ 68.983869][ T7939] ksys_mount+0xcc/0x100 [ 68.988091][ T7939] __x64_sys_mount+0xbf/0xd0 [ 68.992772][ T7939] do_syscall_64+0xf7/0x1c0 [ 68.997269][ T7939] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.003145][ T7939] RIP: 0033:0x440179 [ 69.007016][ T7939] 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 [ 69.026626][ T7939] RSP: 002b:00007ffe3ac97c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 69.035573][ T7939] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440179 [ 69.043612][ T7939] RDX: 0000000020000080 RSI: 0000000020000180 RDI: 0000000020000000 [ 69.051649][ T7939] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 69.059706][ T7939] R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000401a00 [ 69.067933][ T7939] R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 [ 69.077810][ T7939] Kernel Offset: disabled [ 69.082226][ T7939] Rebooting in 86400 seconds..