[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.802617][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 72.802629][ T26] audit: type=1800 audit(1572218998.308:39): pid=9126 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 72.847518][ T26] audit: type=1800 audit(1572218998.308:40): pid=9126 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 75.861895][ T26] audit: type=1400 audit(1572219001.368:41): avc: denied { map } for pid=9302 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 '10.128.10.55' (ECDSA) to the list of known hosts. executing program [ 82.335971][ T26] audit: type=1400 audit(1572219007.838:42): avc: denied { map } for pid=9314 comm="syz-executor321" path="/root/syz-executor321826314" 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 [ 82.343224][ T9314] [EXFAT] trying to mount... [ 82.368383][ T2500] blk_update_request: I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 82.379806][ T9314] ------------[ cut here ]------------ [ 82.385300][ T9314] [EXFAT] No bh, device seems wrong or to be ejected. [ 82.392777][ T9314] WARNING: CPU: 1 PID: 9314 at drivers/staging/exfat/exfat_blkdev.c:62 bdev_read+0x258/0x2b0 [ 82.402916][ T9314] Kernel panic - not syncing: panic_on_warn set ... [ 82.409487][ T9314] CPU: 1 PID: 9314 Comm: syz-executor321 Not tainted 5.4.0-rc5 #0 [ 82.417351][ T9314] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.427383][ T9314] Call Trace: [ 82.430656][ T9314] dump_stack+0x172/0x1f0 [ 82.435022][ T9314] ? bdev_read+0x1b0/0x2b0 [ 82.439418][ T9314] panic+0x2e3/0x75c [ 82.443292][ T9314] ? add_taint.cold+0x16/0x16 [ 82.447947][ T9314] ? __kasan_check_write+0x14/0x20 [ 82.453032][ T9314] ? __warn.cold+0x14/0x35 [ 82.457439][ T9314] ? __warn+0xd9/0x1d0 [ 82.461488][ T9314] ? bdev_read+0x258/0x2b0 [ 82.465883][ T9314] __warn.cold+0x2f/0x35 [ 82.470104][ T9314] ? bdev_read+0x258/0x2b0 [ 82.474501][ T9314] report_bug+0x289/0x300 [ 82.478811][ T9314] do_error_trap+0x11b/0x200 [ 82.483379][ T9314] do_invalid_op+0x37/0x50 [ 82.487773][ T9314] ? bdev_read+0x258/0x2b0 [ 82.492175][ T9314] invalid_op+0x23/0x30 [ 82.496308][ T9314] RIP: 0010:bdev_read+0x258/0x2b0 [ 82.501315][ T9314] Code: ff df 80 3c 02 00 0f 84 51 ff ff ff 4c 89 e7 e8 ce ec 39 fc e9 44 ff ff ff e8 14 8d fe fb 48 c7 c7 20 0b 3d 88 e8 20 c3 cf fb <0f> 0b eb 8a e8 af eb 39 fc e9 17 fe ff ff e8 e5 eb 39 fc e9 99 fe [ 82.520961][ T9314] RSP: 0018:ffff8880963efad0 EFLAGS: 00010282 [ 82.527006][ T9314] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 82.535042][ T9314] RDX: 0000000000000000 RSI: ffffffff815cc2b6 RDI: ffffed1012c7df4c [ 82.542993][ T9314] RBP: ffff8880963efb10 R08: ffff88809c90c2c0 R09: ffffed1015d26159 [ 82.550940][ T9314] R10: ffffed1015d26158 R11: ffff8880ae930ac7 R12: 0000000000000000 [ 82.558889][ T9314] R13: ffff888096200000 R14: 0000000000000001 R15: 0000000000000200 [ 82.566905][ T9314] ? vprintk_func+0x86/0x189 [ 82.571482][ T9314] sector_read+0x156/0x1e0 [ 82.575880][ T9314] exfat_fill_super.cold+0x4d6/0xdba [ 82.581148][ T9314] ? exfat_read_root+0x8d0/0x8d0 [ 82.586065][ T9314] ? vsprintf+0x40/0x40 [ 82.590200][ T9314] ? wait_for_completion+0x440/0x440 [ 82.595464][ T9314] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 82.601159][ T9314] ? set_blocksize+0x2bf/0x340 [ 82.605901][ T9314] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.612120][ T9314] mount_bdev+0x304/0x3c0 [ 82.616426][ T9314] ? exfat_read_root+0x8d0/0x8d0 [ 82.621341][ T9314] exfat_fs_mount+0x35/0x40 [ 82.625820][ T9314] ? exfat_remount+0x50/0x50 [ 82.630395][ T9314] legacy_get_tree+0x108/0x220 [ 82.635137][ T9314] vfs_get_tree+0x8e/0x300 [ 82.639531][ T9314] do_mount+0x143d/0x1d10 [ 82.643896][ T9314] ? copy_mount_string+0x40/0x40 [ 82.648816][ T9314] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.655033][ T9314] ? _copy_from_user+0x12c/0x1a0 [ 82.659951][ T9314] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.666166][ T9314] ? copy_mount_options+0x2e8/0x3f0 [ 82.671342][ T9314] ksys_mount+0xdb/0x150 [ 82.675563][ T9314] __x64_sys_mount+0xbe/0x150 [ 82.680222][ T9314] do_syscall_64+0xfa/0x760 [ 82.684705][ T9314] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.690572][ T9314] RIP: 0033:0x440179 [ 82.694446][ T9314] 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 [ 82.714025][ T9314] RSP: 002b:00007ffdb08b7af8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 82.722416][ T9314] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440179 [ 82.730362][ T9314] RDX: 0000000020000200 RSI: 00000000200001c0 RDI: 0000000020000400 [ 82.738311][ T9314] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 82.746259][ T9314] R10: 0000000002800001 R11: 0000000000000246 R12: 0000000000401a00 [ 82.754207][ T9314] R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 [ 82.763584][ T9314] Kernel Offset: disabled [ 82.767983][ T9314] Rebooting in 86400 seconds..