[info] Using makefile-style concurrent boot in runlevel 2.
[   25.455853] audit: type=1800 audit(1543142353.254:21): pid=5821 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0
[   25.476189] audit: type=1800 audit(1543142353.254:22): pid=5821 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0
[....] 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 '10.128.10.28' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   37.507834] ==================================================================
[   37.515281] BUG: KASAN: slab-out-of-bounds in queue_stack_map_push_elem+0x185/0x290
[   37.523058] Write of size 262146 at addr ffff8881d2ec9bc8 by task syz-executor091/5976
[   37.531087] 
[   37.532703] CPU: 1 PID: 5976 Comm: syz-executor091 Not tainted 4.20.0-rc3+ #202
[   37.540141] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   37.549486] Call Trace:
[   37.552072]  dump_stack+0x244/0x39d
[   37.555692]  ? dump_stack_print_info.cold.1+0x20/0x20
[   37.560878]  ? printk+0xa7/0xcf
[   37.564154]  ? kmsg_dump_rewind_nolock+0xe4/0xe4
[   37.568909]  print_address_description.cold.7+0x9/0x1ff
[   37.574312]  kasan_report.cold.8+0x242/0x309
[   37.578728]  ? queue_stack_map_push_elem+0x185/0x290
[   37.583876]  check_memory_region+0x13e/0x1b0
[   37.588276]  memcpy+0x37/0x50
[   37.591367]  queue_stack_map_push_elem+0x185/0x290
[   37.596292]  ? queue_map_pop_elem+0x30/0x30
[   37.600625]  map_update_elem+0x605/0xf60
[   37.604678]  __x64_sys_bpf+0x32d/0x520
[   37.608555]  ? bpf_prog_get+0x20/0x20
[   37.612353]  do_syscall_64+0x1b9/0x820
[   37.616235]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   37.621584]  ? syscall_return_slowpath+0x5e0/0x5e0
[   37.626557]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   37.631413]  ? trace_hardirqs_on_caller+0x310/0x310
[   37.636425]  ? prepare_exit_to_usermode+0x3b0/0x3b0
[   37.641432]  ? prepare_exit_to_usermode+0x291/0x3b0
[   37.646698]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   37.651558]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   37.656742] RIP: 0033:0x4400e9
[   37.659921] 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
[   37.678810] RSP: 002b:00007ffcb6e2c308 EFLAGS: 00000213 ORIG_RAX: 0000000000000141
[   37.686646] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9
[   37.693913] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002
[   37.701178] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   37.708429] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970
[   37.715680] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000
[   37.722995] 
[   37.724620] Allocated by task 5976:
[   37.728243]  save_stack+0x43/0xd0
[   37.731683]  kasan_kmalloc+0xc7/0xe0
[   37.735394]  __kmalloc_node+0x50/0x70
[   37.739191]  bpf_map_area_alloc+0x3f/0x90
[   37.743338]  queue_stack_map_alloc+0x192/0x290
[   37.747903]  map_create+0x3bd/0x1110
[   37.751603]  __x64_sys_bpf+0x303/0x520
[   37.755474]  do_syscall_64+0x1b9/0x820
[   37.759346]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   37.764515] 
[   37.766123] Freed by task 3751:
[   37.769386]  save_stack+0x43/0xd0
[   37.773312]  __kasan_slab_free+0x102/0x150
[   37.778109]  kasan_slab_free+0xe/0x10
[   37.781893]  kfree+0xcf/0x230
[   37.784977]  kernfs_fop_release+0x12b/0x1a0
[   37.789282]  __fput+0x385/0xa30
[   37.792713]  ____fput+0x15/0x20
[   37.795989]  task_work_run+0x1e8/0x2a0
[   37.799862]  exit_to_usermode_loop+0x318/0x380
[   37.804425]  do_syscall_64+0x6be/0x820
[   37.808295]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   37.813572] 
[   37.815188] The buggy address belongs to the object at ffff8881d2ec9a80
[   37.815188]  which belongs to the cache kmalloc-512 of size 512
[   37.827840] The buggy address is located 328 bytes inside of
[   37.827840]  512-byte region [ffff8881d2ec9a80, ffff8881d2ec9c80)
[   37.839705] The buggy address belongs to the page:
[   37.844621] page:ffffea00074bb240 count:1 mapcount:0 mapping:ffff8881da800940 index:0x0
[   37.852745] flags: 0x2fffc0000000200(slab)
[   37.856965] raw: 02fffc0000000200 ffffea00074d6f88 ffffea000730d288 ffff8881da800940
[   37.864839] raw: 0000000000000000 ffff8881d2ec9080 0000000100000006 0000000000000000
[   37.872711] page dumped because: kasan: bad access detected
[   37.878403] 
[   37.880019] Memory state around the buggy address:
[   37.884938]  ffff8881d2ec9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   37.892286]  ffff8881d2ec9b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   37.899630] >ffff8881d2ec9c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   37.906996]                    ^
[   37.910356]  ffff8881d2ec9c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   37.917710]  ffff8881d2ec9d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   37.925053] ==================================================================
[   37.932400] Disabling lock debugging due to kernel taint
[   37.937827] Kernel panic - not syncing: panic_on_warn set ...
[   37.943697] CPU: 1 PID: 5976 Comm: syz-executor091 Tainted: G    B             4.20.0-rc3+ #202
[   37.952519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   37.961958] Call Trace:
[   37.964534]  dump_stack+0x244/0x39d
[   37.968146]  ? dump_stack_print_info.cold.1+0x20/0x20
[   37.973320]  panic+0x2ad/0x55c
[   37.976497]  ? add_taint.cold.5+0x16/0x16
[   37.980629]  ? add_taint.cold.5+0x5/0x16
[   37.984673]  ? trace_hardirqs_off+0xaf/0x310
[   37.989063]  kasan_end_report+0x47/0x4f
[   37.993027]  kasan_report.cold.8+0x76/0x309
[   37.997332]  ? queue_stack_map_push_elem+0x185/0x290
[   38.002423]  check_memory_region+0x13e/0x1b0
[   38.006817]  memcpy+0x37/0x50
[   38.009908]  queue_stack_map_push_elem+0x185/0x290
[   38.014819]  ? queue_map_pop_elem+0x30/0x30
[   38.019119]  map_update_elem+0x605/0xf60
[   38.023162]  __x64_sys_bpf+0x32d/0x520
[   38.027047]  ? bpf_prog_get+0x20/0x20
[   38.030840]  do_syscall_64+0x1b9/0x820
[   38.034709]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   38.040052]  ? syscall_return_slowpath+0x5e0/0x5e0
[   38.045095]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   38.049940]  ? trace_hardirqs_on_caller+0x310/0x310
[   38.054952]  ? prepare_exit_to_usermode+0x3b0/0x3b0
[   38.059957]  ? prepare_exit_to_usermode+0x291/0x3b0
[   38.064960]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   38.069791]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   38.074964] RIP: 0033:0x4400e9
[   38.078143] 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
[   38.097159] RSP: 002b:00007ffcb6e2c308 EFLAGS: 00000213 ORIG_RAX: 0000000000000141
[   38.105035] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9
[   38.112296] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002
[   38.119549] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   38.126814] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970
[   38.134072] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000
[   38.142479] Kernel Offset: disabled
[   38.146112] Rebooting in 86400 seconds..