[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 70.499238][ T26] kauditd_printk_skb: 8 callbacks suppressed [ 70.499252][ T26] audit: type=1400 audit(1574486178.575:41): avc: denied { map } for pid=9427 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.155' (ECDSA) to the list of known hosts. executing program [ 79.172442][ T26] audit: type=1400 audit(1574486187.255:42): avc: denied { map } for pid=9439 comm="syz-executor769" path="/root/syz-executor769661791" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 79.179357][ T9439] [EXFAT] trying to mount... [ 79.205004][ T2507] block nbd0: Attempted send on invalid socket [ 79.211407][ T2507] blk_update_request: I/O error, dev nbd0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 79.222635][ T9439] ------------[ cut here ]------------ [ 79.228138][ T9439] [EXFAT] No bh, device seems wrong or to be ejected. [ 79.235740][ T9439] WARNING: CPU: 1 PID: 9439 at drivers/staging/exfat/exfat_blkdev.c:62 bdev_read+0x258/0x2b0 [ 79.245882][ T9439] Kernel panic - not syncing: panic_on_warn set ... [ 79.252483][ T9439] CPU: 1 PID: 9439 Comm: syz-executor769 Not tainted 5.4.0-rc8-syzkaller #0 [ 79.261153][ T9439] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.271193][ T9439] Call Trace: [ 79.274582][ T9439] dump_stack+0x197/0x210 [ 79.278901][ T9439] ? bdev_read+0x1a0/0x2b0 [ 79.283295][ T9439] panic+0x2e3/0x75c [ 79.287169][ T9439] ? add_taint.cold+0x16/0x16 [ 79.291832][ T9439] ? __kasan_check_write+0x14/0x20 [ 79.296928][ T9439] ? __warn.cold+0x14/0x35 [ 79.301325][ T9439] ? __warn+0xd9/0x1d0 [ 79.305380][ T9439] ? bdev_read+0x258/0x2b0 [ 79.309774][ T9439] __warn.cold+0x2f/0x35 [ 79.313997][ T9439] ? bdev_read+0x258/0x2b0 [ 79.318395][ T9439] report_bug+0x289/0x300 [ 79.322706][ T9439] do_error_trap+0x11b/0x200 [ 79.327273][ T9439] do_invalid_op+0x37/0x50 [ 79.331666][ T9439] ? bdev_read+0x258/0x2b0 [ 79.336060][ T9439] invalid_op+0x23/0x30 [ 79.340194][ T9439] RIP: 0010:bdev_read+0x258/0x2b0 [ 79.345197][ T9439] Code: ff df 80 3c 02 00 0f 84 51 ff ff ff 4c 89 e7 e8 8e 8d 39 fc e9 44 ff ff ff e8 74 21 fe fb 48 c7 c7 20 20 3d 88 e8 20 54 cf fb <0f> 0b eb 8a e8 6f 8c 39 fc e9 17 fe ff ff e8 a5 8c 39 fc e9 99 fe [ 79.364778][ T9439] RSP: 0018:ffff8880a15dfad0 EFLAGS: 00010282 [ 79.370829][ T9439] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 79.378792][ T9439] RDX: 0000000000000000 RSI: ffffffff815cf7d6 RDI: ffffed10142bbf4c [ 79.386749][ T9439] RBP: ffff8880a15dfb10 R08: ffff8880a0400180 R09: ffffed1015d26159 [ 79.394703][ T9439] R10: ffffed1015d26158 R11: ffff8880ae930ac7 R12: 0000000000000000 [ 79.402654][ T9439] R13: ffff888089bc0000 R14: 0000000000000001 R15: 0000000000000200 [ 79.410624][ T9439] ? vprintk_func+0x86/0x189 [ 79.415201][ T9439] sector_read+0x156/0x1e0 [ 79.419609][ T9439] exfat_fill_super.cold+0x4d6/0xdba [ 79.425135][ T9439] ? exfat_read_root+0x8d0/0x8d0 [ 79.430053][ T9439] ? vsprintf+0x40/0x40 [ 79.434197][ T9439] ? wait_for_completion+0x440/0x440 [ 79.439487][ T9439] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 79.445199][ T9439] ? set_blocksize+0x2bf/0x340 [ 79.449962][ T9439] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 79.456254][ T9439] mount_bdev+0x304/0x3c0 [ 79.460570][ T9439] ? exfat_read_root+0x8d0/0x8d0 [ 79.465491][ T9439] exfat_fs_mount+0x35/0x40 [ 79.469973][ T9439] ? exfat_remount+0x50/0x50 [ 79.474550][ T9439] legacy_get_tree+0x108/0x220 [ 79.479295][ T9439] vfs_get_tree+0x8e/0x300 [ 79.483695][ T9439] do_mount+0x1369/0x1b60 [ 79.488048][ T9439] ? copy_mount_string+0x40/0x40 [ 79.492961][ T9439] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 79.499178][ T9439] ? _copy_from_user+0x12c/0x1a0 [ 79.504093][ T9439] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 79.510339][ T9439] ? copy_mount_options+0x2e8/0x3f0 [ 79.515526][ T9439] ksys_mount+0xdb/0x150 [ 79.519773][ T9439] __x64_sys_mount+0xbe/0x150 [ 79.524439][ T9439] do_syscall_64+0xfa/0x760 [ 79.528923][ T9439] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 79.534797][ T9439] RIP: 0033:0x440179 [ 79.538675][ T9439] 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 [ 79.558257][ T9439] RSP: 002b:00007ffe3ebef1a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 79.566661][ T9439] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440179 [ 79.574624][ T9439] RDX: 0000000020000080 RSI: 0000000020000180 RDI: 0000000020000000 [ 79.582584][ T9439] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 79.590536][ T9439] R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000401a00 [ 79.598484][ T9439] R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 [ 79.612922][ T9439] Kernel Offset: disabled [ 79.617305][ T9439] Rebooting in 86400 seconds..