[info] Using makefile-style concurrent boot in runlevel 2.
[   25.487807] audit: type=1800 audit(1543143832.980:21): pid=5822 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0
[   25.514211] audit: type=1800 audit(1543143832.980:22): pid=5822 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 '10.128.0.103' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   33.846815] ==================================================================
[   33.854275] BUG: KASAN: slab-out-of-bounds in queue_stack_map_push_elem+0x185/0x290
[   33.862061] Write of size 262146 at addr ffff8881c5fb5e88 by task syz-executor400/5976
[   33.870223] 
[   33.871833] CPU: 1 PID: 5976 Comm: syz-executor400 Not tainted 4.20.0-rc3+ #202
[   33.879255] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.888586] Call Trace:
[   33.891158]  dump_stack+0x244/0x39d
[   33.894775]  ? dump_stack_print_info.cold.1+0x20/0x20
[   33.899944]  ? printk+0xa7/0xcf
[   33.903203]  ? kmsg_dump_rewind_nolock+0xe4/0xe4
[   33.907944]  print_address_description.cold.7+0x9/0x1ff
[   33.913293]  kasan_report.cold.8+0x242/0x309
[   33.917689]  ? queue_stack_map_push_elem+0x185/0x290
[   33.922779]  check_memory_region+0x13e/0x1b0
[   33.927169]  memcpy+0x37/0x50
[   33.930262]  queue_stack_map_push_elem+0x185/0x290
[   33.935189]  ? queue_map_pop_elem+0x30/0x30
[   33.939499]  map_update_elem+0x605/0xf60
[   33.943546]  __x64_sys_bpf+0x32d/0x520
[   33.947414]  ? bpf_prog_get+0x20/0x20
[   33.951210]  do_syscall_64+0x1b9/0x820
[   33.955080]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   33.960429]  ? syscall_return_slowpath+0x5e0/0x5e0
[   33.965339]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   33.970168]  ? trace_hardirqs_on_caller+0x310/0x310
[   33.975182]  ? prepare_exit_to_usermode+0x3b0/0x3b0
[   33.980188]  ? prepare_exit_to_usermode+0x291/0x3b0
[   33.985192]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   33.990020]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   33.995193] RIP: 0033:0x4400e9
[   33.998373] 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
[   34.017270] RSP: 002b:00007ffc085bd3f8 EFLAGS: 00000213 ORIG_RAX: 0000000000000141
[   34.024958] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9
[   34.032206] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002
[   34.039456] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   34.046706] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970
[   34.054014] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000
[   34.061327] 
[   34.062951] Allocated by task 5976:
[   34.066579]  save_stack+0x43/0xd0
[   34.070014]  kasan_kmalloc+0xc7/0xe0
[   34.073711]  __kmalloc_node+0x50/0x70
[   34.077489]  bpf_map_area_alloc+0x3f/0x90
[   34.081611]  queue_stack_map_alloc+0x192/0x290
[   34.086176]  map_create+0x3bd/0x1110
[   34.089868]  __x64_sys_bpf+0x303/0x520
[   34.093737]  do_syscall_64+0x1b9/0x820
[   34.097605]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   34.102768] 
[   34.104382] Freed by task 3716:
[   34.107643]  save_stack+0x43/0xd0
[   34.111084]  __kasan_slab_free+0x102/0x150
[   34.115319]  kasan_slab_free+0xe/0x10
[   34.119101]  kfree+0xcf/0x230
[   34.122185]  kernfs_fop_release+0x12b/0x1a0
[   34.126486]  __fput+0x385/0xa30
[   34.129742]  ____fput+0x15/0x20
[   34.133003]  task_work_run+0x1e8/0x2a0
[   34.136870]  exit_to_usermode_loop+0x318/0x380
[   34.141434]  do_syscall_64+0x6be/0x820
[   34.145301]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   34.150462] 
[   34.152067] The buggy address belongs to the object at ffff8881c5fb5d40
[   34.152067]  which belongs to the cache kmalloc-512 of size 512
[   34.164704] The buggy address is located 328 bytes inside of
[   34.164704]  512-byte region [ffff8881c5fb5d40, ffff8881c5fb5f40)
[   34.176677] The buggy address belongs to the page:
[   34.181587] page:ffffea000717ed40 count:1 mapcount:0 mapping:ffff8881da800940 index:0xffff8881c5fb5340
[   34.191012] flags: 0x2fffc0000000200(slab)
[   34.195241] raw: 02fffc0000000200 ffffea000717ee48 ffffea00072f8f08 ffff8881da800940
[   34.203113] raw: ffff8881c5fb5340 ffff8881c5fb50c0 0000000100000004 0000000000000000
[   34.210971] page dumped because: kasan: bad access detected
[   34.216693] 
[   34.218297] Memory state around the buggy address:
[   34.223205]  ffff8881c5fb5d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.230550]  ffff8881c5fb5e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   34.237935] >ffff8881c5fb5e80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
[   34.245272]                                            ^
[   34.250701]  ffff8881c5fb5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   34.258038]  ffff8881c5fb5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   34.265376] ==================================================================
[   34.272727] Disabling lock debugging due to kernel taint
[   34.278181] Kernel panic - not syncing: panic_on_warn set ...
[   34.284046] CPU: 1 PID: 5976 Comm: syz-executor400 Tainted: G    B             4.20.0-rc3+ #202
[   34.292859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   34.302188] Call Trace:
[   34.304765]  dump_stack+0x244/0x39d
[   34.308383]  ? dump_stack_print_info.cold.1+0x20/0x20
[   34.313558]  panic+0x2ad/0x55c
[   34.316732]  ? add_taint.cold.5+0x16/0x16
[   34.320860]  ? add_taint.cold.5+0x5/0x16
[   34.325010]  ? trace_hardirqs_off+0xaf/0x310
[   34.329482]  kasan_end_report+0x47/0x4f
[   34.333439]  kasan_report.cold.8+0x76/0x309
[   34.337740]  ? queue_stack_map_push_elem+0x185/0x290
[   34.342824]  check_memory_region+0x13e/0x1b0
[   34.347212]  memcpy+0x37/0x50
[   34.350301]  queue_stack_map_push_elem+0x185/0x290
[   34.355211]  ? queue_map_pop_elem+0x30/0x30
[   34.359512]  map_update_elem+0x605/0xf60
[   34.363554]  __x64_sys_bpf+0x32d/0x520
[   34.367420]  ? bpf_prog_get+0x20/0x20
[   34.371226]  do_syscall_64+0x1b9/0x820
[   34.375106]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   34.380454]  ? syscall_return_slowpath+0x5e0/0x5e0
[   34.385364]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   34.390203]  ? trace_hardirqs_on_caller+0x310/0x310
[   34.395324]  ? prepare_exit_to_usermode+0x3b0/0x3b0
[   34.400332]  ? prepare_exit_to_usermode+0x291/0x3b0
[   34.405418]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   34.410238]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   34.415407] RIP: 0033:0x4400e9
[   34.418596] 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
[   34.437481] RSP: 002b:00007ffc085bd3f8 EFLAGS: 00000213 ORIG_RAX: 0000000000000141
[   34.445168] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9
[   34.452416] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002
[   34.459753] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   34.466999] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970
[   34.474250] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000
[   34.482906] Kernel Offset: disabled
[   34.486533] Rebooting in 86400 seconds..