INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.21' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.511890] BFS-fs: bfs_fill_super(): loop0 is unclean, continuing [ 28.518423] WARNING: CPU: 1 PID: 4468 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 [ 28.526386] Kernel panic - not syncing: panic_on_warn set ... [ 28.526386] [ 28.533727] CPU: 1 PID: 4468 Comm: syzkaller458727 Not tainted 4.16.0-rc7+ #7 [ 28.540968] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.550292] Call Trace: [ 28.552854] dump_stack+0x194/0x24d [ 28.556454] ? arch_local_irq_restore+0x53/0x53 [ 28.561096] ? vsnprintf+0x1ed/0x1900 [ 28.564875] panic+0x1e4/0x41c [ 28.568045] ? refcount_error_report+0x214/0x214 [ 28.572778] ? show_regs_print_info+0x18/0x18 [ 28.577253] ? __warn+0x1c1/0x200 [ 28.580688] ? kmalloc_slab+0x5d/0x70 [ 28.584474] __warn+0x1dc/0x200 [ 28.587734] ? vprintk_emit+0x5b5/0xb90 [ 28.591689] ? kmalloc_slab+0x5d/0x70 [ 28.595462] report_bug+0x1f4/0x2b0 [ 28.599068] fixup_bug.part.10+0x37/0x80 [ 28.603102] do_error_trap+0x2d7/0x3e0 [ 28.606975] ? math_error+0x400/0x400 [ 28.610757] ? remove_wait_queue+0x350/0x350 [ 28.615147] ? __sched_text_start+0x8/0x8 [ 28.619358] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.624177] do_invalid_op+0x1b/0x20 [ 28.627861] invalid_op+0x1b/0x40 [ 28.631288] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 28.635674] RSP: 0018:ffff8801ad117908 EFLAGS: 00010246 [ 28.641015] RAX: 0000000000000000 RBX: ffff8801b904e004 RCX: ffffffff820931da [ 28.648274] RDX: 1ffff1003a1dfac4 RSI: 0000000000000000 RDI: 0000000000800000 [ 28.655527] RBP: ffff8801ad117908 R08: 1ffff10035a22e81 R09: 0000000000000000 [ 28.662772] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000007fffff [ 28.670024] R13: ffff8801b904e000 R14: 00000000014080c0 R15: ffff8801d9194cc0 [ 28.677288] ? bfs_fill_super+0x38a/0xea0 [ 28.681418] __kmalloc+0x25/0x760 [ 28.684848] ? __might_sleep+0x95/0x190 [ 28.688804] ? bfs_fill_super+0x3d3/0xea0 [ 28.692934] ? bfs_fill_super+0xde4/0xea0 [ 28.697069] bfs_fill_super+0x3d3/0xea0 [ 28.701024] ? snprintf+0xc0/0xf0 [ 28.704469] ? set_blocksize+0x1f1/0x260 [ 28.708516] mount_bdev+0x2b7/0x370 [ 28.712117] ? bfs_iget+0xb70/0xb70 [ 28.715718] bfs_mount+0x34/0x40 [ 28.719064] mount_fs+0x66/0x2d0 [ 28.722416] vfs_kern_mount.part.26+0xc6/0x4a0 [ 28.726979] ? may_umount+0xa0/0xa0 [ 28.730586] ? _raw_read_unlock+0x22/0x30 [ 28.734707] ? __get_fs_type+0x8a/0xc0 [ 28.738567] do_mount+0xea4/0x2bb0 [ 28.742082] ? __might_fault+0x110/0x1d0 [ 28.746121] ? copy_mount_string+0x40/0x40 [ 28.750326] ? check_same_owner+0x320/0x320 [ 28.754618] ? __check_object_size+0x8b/0x530 [ 28.759089] ? __might_sleep+0x95/0x190 [ 28.763047] ? kasan_check_write+0x14/0x20 [ 28.767260] ? _copy_from_user+0x99/0x110 [ 28.771394] ? memdup_user+0x5e/0x90 [ 28.775081] ? copy_mount_options+0x1f7/0x2e0 [ 28.779548] SyS_mount+0xab/0x120 [ 28.782970] ? copy_mnt_ns+0xb30/0xb30 [ 28.786828] do_syscall_64+0x281/0x940 [ 28.790686] ? vmalloc_sync_all+0x30/0x30 [ 28.794806] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 28.800317] ? syscall_return_slowpath+0x550/0x550 [ 28.805218] ? syscall_return_slowpath+0x2ac/0x550 [ 28.810123] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 28.815458] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.820275] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 28.825435] RIP: 0033:0x442d3a [ 28.828593] RSP: 002b:00007ffd0d12ac38 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 28.836274] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442d3a [ 28.843514] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd0d12ac40 [ 28.850758] RBP: 0000000000000004 R08: 0000000000000000 R09: 000000000000000a [ 28.858004] R10: 00000000c0ed0000 R11: 0000000000000297 R12: 0000000000401ba0 [ 28.865252] R13: 0000000000401c30 R14: 0000000000000000 R15: 0000000000000000 [ 28.873090] Dumping ftrace buffer: [ 28.876703] (ftrace buffer empty) [ 28.880388] Kernel Offset: disabled [ 28.883996] Rebooting in 86400 seconds..