[info] Using makefile-style concurrent boot in runlevel 2.
[   26.195095] audit: type=1800 audit(1543148634.412:21): pid=5851 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 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 '10.128.0.3' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   44.512095] ==================================================================
[   44.519607] BUG: KASAN: slab-out-of-bounds in queue_stack_map_push_elem+0x185/0x290
[   44.527404] Write of size 262146 at addr ffff8881beb8f6c8 by task syz-executor447/6007
[   44.535874] 
[   44.537504] CPU: 0 PID: 6007 Comm: syz-executor447 Not tainted 4.20.0-rc3+ #127
[   44.544930] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.554273] Call Trace:
[   44.556865]  dump_stack+0x244/0x39d
[   44.560490]  ? dump_stack_print_info.cold.1+0x20/0x20
[   44.565672]  ? printk+0xa7/0xcf
[   44.568940]  ? kmsg_dump_rewind_nolock+0xe4/0xe4
[   44.573687]  print_address_description.cold.7+0x9/0x1ff
[   44.579154]  kasan_report.cold.8+0x242/0x309
[   44.583552]  ? queue_stack_map_push_elem+0x185/0x290
[   44.588650]  check_memory_region+0x13e/0x1b0
[   44.593059]  memcpy+0x37/0x50
[   44.596210]  queue_stack_map_push_elem+0x185/0x290
[   44.601255]  ? queue_map_pop_elem+0x30/0x30
[   44.605561]  map_update_elem+0x605/0xf60
[   44.609621]  __x64_sys_bpf+0x32d/0x520
[   44.613508]  ? bpf_prog_get+0x20/0x20
[   44.617301]  do_syscall_64+0x1b9/0x820
[   44.621266]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   44.626613]  ? syscall_return_slowpath+0x5e0/0x5e0
[   44.631520]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   44.636377]  ? trace_hardirqs_on_caller+0x310/0x310
[   44.641519]  ? prepare_exit_to_usermode+0x291/0x3b0
[   44.646532]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   44.651413]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   44.656669] RIP: 0033:0x4400e9
[   44.659854] 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
[   44.678746] RSP: 002b:00007ffe96930f38 EFLAGS: 00000213 ORIG_RAX: 0000000000000141
[   44.686585] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9
[   44.693844] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002
[   44.701096] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   44.708511] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970
[   44.715783] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000
[   44.723176] 
[   44.724805] Allocated by task 6007:
[   44.728423]  save_stack+0x43/0xd0
[   44.731865]  kasan_kmalloc+0xc7/0xe0
[   44.735687]  __kmalloc_node+0x50/0x70
[   44.739494]  bpf_map_area_alloc+0x3f/0x90
[   44.743625]  queue_stack_map_alloc+0x192/0x290
[   44.748199]  map_create+0x3bd/0x1110
[   44.751910]  __x64_sys_bpf+0x303/0x520
[   44.755785]  do_syscall_64+0x1b9/0x820
[   44.759712]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   44.764879] 
[   44.766489] Freed by task 3716:
[   44.769762]  save_stack+0x43/0xd0
[   44.773203]  __kasan_slab_free+0x102/0x150
[   44.777532]  kasan_slab_free+0xe/0x10
[   44.781320]  kfree+0xcf/0x230
[   44.784419]  kernfs_fop_release+0x12b/0x1a0
[   44.788724]  __fput+0x385/0xa30
[   44.791987]  ____fput+0x15/0x20
[   44.795251]  task_work_run+0x1e8/0x2a0
[   44.799122]  exit_to_usermode_loop+0x318/0x380
[   44.803899]  do_syscall_64+0x6be/0x820
[   44.807786]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   44.812953] 
[   44.814567] The buggy address belongs to the object at ffff8881beb8f580
[   44.814567]  which belongs to the cache kmalloc-512 of size 512
[   44.827311] The buggy address is located 328 bytes inside of
[   44.827311]  512-byte region [ffff8881beb8f580, ffff8881beb8f780)
[   44.839167] The buggy address belongs to the page:
[   44.844084] page:ffffea0006fae3c0 count:1 mapcount:0 mapping:ffff8881da800940 index:0x0
[   44.852210] flags: 0x2fffc0000000200(slab)
[   44.856551] raw: 02fffc0000000200 ffffea0006fa8288 ffffea0006fae908 ffff8881da800940
[   44.864438] raw: 0000000000000000 ffff8881beb8f080 0000000100000006 0000000000000000
[   44.872306] page dumped because: kasan: bad access detected
[   44.877993] 
[   44.879599] Memory state around the buggy address:
[   44.884510]  ffff8881beb8f600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   44.891862]  ffff8881beb8f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   44.899208] >ffff8881beb8f700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   44.906602]                    ^
[   44.909968]  ffff8881beb8f780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   44.917320]  ffff8881beb8f800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   44.924665] ==================================================================
[   44.932005] Disabling lock debugging due to kernel taint
[   44.937435] Kernel panic - not syncing: panic_on_warn set ...
[   44.943313] CPU: 0 PID: 6007 Comm: syz-executor447 Tainted: G    B             4.20.0-rc3+ #127
[   44.952130] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.961476] Call Trace:
[   44.964117]  dump_stack+0x244/0x39d
[   44.967737]  ? dump_stack_print_info.cold.1+0x20/0x20
[   44.973064]  panic+0x2ad/0x55c
[   44.976243]  ? add_taint.cold.5+0x16/0x16
[   44.980613]  ? add_taint.cold.5+0x5/0x16
[   44.984658]  ? trace_hardirqs_off+0xaf/0x310
[   44.989054]  kasan_end_report+0x47/0x4f
[   44.993007]  kasan_report.cold.8+0x76/0x309
[   44.997362]  ? queue_stack_map_push_elem+0x185/0x290
[   45.002587]  check_memory_region+0x13e/0x1b0
[   45.006981]  memcpy+0x37/0x50
[   45.010072]  queue_stack_map_push_elem+0x185/0x290
[   45.014995]  ? queue_map_pop_elem+0x30/0x30
[   45.019299]  map_update_elem+0x605/0xf60
[   45.023415]  __x64_sys_bpf+0x32d/0x520
[   45.027296]  ? bpf_prog_get+0x20/0x20
[   45.031090]  do_syscall_64+0x1b9/0x820
[   45.034968]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   45.040318]  ? syscall_return_slowpath+0x5e0/0x5e0
[   45.045235]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   45.050079]  ? trace_hardirqs_on_caller+0x310/0x310
[   45.055087]  ? prepare_exit_to_usermode+0x291/0x3b0
[   45.060091]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   45.064918]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   45.070092] RIP: 0033:0x4400e9
[   45.073271] 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
[   45.092206] RSP: 002b:00007ffe96930f38 EFLAGS: 00000213 ORIG_RAX: 0000000000000141
[   45.099901] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9
[   45.107154] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002
[   45.114424] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   45.121685] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970
[   45.128935] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000
[   45.137622] Kernel Offset: disabled
[   45.141242] Rebooting in 86400 seconds..