[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 37.469078] audit: type=1800 audit(1538180690.302:25): pid=5893 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.494509] audit: type=1800 audit(1538180690.302:26): pid=5893 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.522449] audit: type=1800 audit(1538180690.312:27): pid=5893 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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 '10.128.0.99' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.768429] ------------[ cut here ]------------ [ 48.773199] illegal size (0) or align (8) for percpu allocation [ 48.779416] WARNING: CPU: 0 PID: 6046 at mm/percpu.c:1382 pcpu_alloc+0x134f/0x15d0 [ 48.787123] Kernel panic - not syncing: panic_on_warn set ... [ 48.787123] [ 48.794471] CPU: 0 PID: 6046 Comm: syz-executor898 Not tainted 4.19.0-rc5-next-20180928+ #84 [ 48.803058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.813180] Call Trace: [ 48.815756] dump_stack+0x1d3/0x2c4 [ 48.819370] ? dump_stack_print_info.cold.2+0x52/0x52 [ 48.824551] panic+0x238/0x4e7 [ 48.827728] ? add_taint.cold.5+0x16/0x16 [ 48.831861] ? __warn.cold.8+0x148/0x1ba [ 48.835904] ? __warn.cold.8+0x117/0x1ba [ 48.839950] ? pcpu_alloc+0x134f/0x15d0 [ 48.843910] __warn.cold.8+0x163/0x1ba [ 48.847781] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.852608] ? pcpu_alloc+0x134f/0x15d0 [ 48.856576] report_bug+0x254/0x2d0 [ 48.860194] do_error_trap+0x11b/0x200 [ 48.864079] do_invalid_op+0x36/0x40 [ 48.867801] ? pcpu_alloc+0x134f/0x15d0 [ 48.871769] invalid_op+0x14/0x20 [ 48.875226] RIP: 0010:pcpu_alloc+0x134f/0x15d0 [ 48.879979] Code: ff e8 45 9f ff ff e9 75 f4 ff ff e8 2b c5 d0 ff 48 8b 95 c8 fd ff ff 48 c7 c7 80 ef 12 88 48 8b b5 e8 fd ff ff e8 01 e0 9a ff <0f> 0b 31 db e9 33 ee ff ff e8 03 c5 d0 ff e8 8e 28 ba ff 31 ff 41 [ 48.898874] RSP: 0018:ffff8801c071f840 EFLAGS: 00010282 [ 48.904218] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 48.911470] RDX: 0000000000000000 RSI: ffffffff8163ea25 RDI: 0000000000000005 [ 48.918723] RBP: ffff8801c071fab8 R08: ffff8801bc470040 R09: fffffbfff1271e5c [ 48.926494] R10: fffffbfff1271e5c R11: ffffffff8938f2e3 R12: 00000000006280c0 [ 48.933752] R13: ffffffffffffffff R14: 0000000000000008 R15: ffff8801d7b5aab4 [ 48.941561] ? vprintk_func+0x85/0x181 [ 48.946143] ? __x64_sys_bpf+0x3d8/0x510 [ 48.950197] ? do_syscall_64+0x1b9/0x820 [ 48.954249] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.959786] ? pcpu_balance_workfn+0x1740/0x1740 [ 48.964713] ? fs_reclaim_acquire+0x20/0x20 [ 48.969021] ? lock_downgrade+0x900/0x900 [ 48.973156] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.978506] ? trace_hardirqs_on+0xbd/0x310 [ 48.982816] ? trace_hardirqs_on+0xbd/0x310 [ 48.987128] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 48.992571] ? kasan_unpoison_shadow+0x35/0x50 [ 48.997144] ? bpf_cgroup_storage_alloc+0x1b1/0x380 [ 49.002160] ? kasan_unpoison_shadow+0x35/0x50 [ 49.006729] ? kasan_kmalloc+0xc7/0xe0 [ 49.010878] ? kmem_cache_alloc_node_trace+0x305/0x740 [ 49.016145] __alloc_percpu_gfp+0x27/0x30 [ 49.020280] bpf_cgroup_storage_alloc+0x2d6/0x380 [ 49.025121] bpf_test_run+0xd1/0x780 [ 49.028824] ? eth_type_trans+0x2ea/0x760 [ 49.032955] ? netlink_diag_dump+0x2a0/0x2a0 [ 49.037353] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.042873] ? bpf_test_init.isra.9+0x70/0x100 [ 49.047443] bpf_prog_test_run_skb+0x634/0xb40 [ 49.052013] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 49.056840] ? bpf_prog_add+0x69/0xd0 [ 49.060628] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.066159] ? __bpf_prog_get+0x9b/0x290 [ 49.070207] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 49.075036] bpf_prog_test_run+0x130/0x1a0 [ 49.079257] __x64_sys_bpf+0x3d8/0x510 [ 49.083128] ? bpf_prog_get+0x20/0x20 [ 49.086922] do_syscall_64+0x1b9/0x820 [ 49.090795] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.096146] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.101074] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.105904] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.110904] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 49.115904] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.121612] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.126450] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.131620] RIP: 0033:0x440329 [ 49.134815] 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 [ 49.153702] RSP: 002b:00007ffc8aedec18 EFLAGS: 00000217 ORIG_RAX: 0000000000000141 [ 49.161394] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440329 [ 49.168647] RDX: 0000000000000028 RSI: 0000000020000180 RDI: 000000000000000a [ 49.175900] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 49.183168] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401bb0 [ 49.190769] R13: 0000000000401c40 R14: 0000000000000000 R15: 0000000000000000 [ 49.199138] Kernel Offset: disabled [ 49.203024] Rebooting in 86400 seconds..