[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.853440][ T27] audit: type=1800 audit(1576974613.747:25): pid=9311 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.873228][ T27] audit: type=1800 audit(1576974613.747:26): pid=9311 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.911052][ T27] audit: type=1800 audit(1576974613.747:27): pid=9311 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 '10.128.0.162' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 80.484471][ T9463] ================================================================== [ 80.492681][ T9463] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 80.500570][ T9463] Read of size 43 at addr 0000000000000000 by task syz-executor138/9463 [ 80.508866][ T9463] [ 80.511207][ T9463] CPU: 0 PID: 9463 Comm: syz-executor138 Not tainted 5.5.0-rc2-next-20191220-syzkaller #0 [ 80.521069][ T9463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.531204][ T9463] Call Trace: [ 80.534570][ T9463] dump_stack+0x197/0x210 [ 80.540383][ T9463] ? llcp_sock_getname+0x358/0x460 [ 80.545841][ T9463] ? llcp_sock_getname+0x358/0x460 [ 80.550931][ T9463] __kasan_report.cold+0x5/0x41 [ 80.557780][ T9463] ? llcp_sock_getname+0x358/0x460 [ 80.562880][ T9463] kasan_report+0x12/0x20 [ 80.567190][ T9463] check_memory_region+0x134/0x1a0 [ 80.572281][ T9463] memcpy+0x24/0x50 [ 80.576249][ T9463] llcp_sock_getname+0x358/0x460 [ 80.581430][ T9463] __sys_getpeername+0x12b/0x290 [ 80.586782][ T9463] ? __ia32_sys_getsockname+0xb0/0xb0 [ 80.592141][ T9463] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 80.597577][ T9463] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 80.603032][ T9463] ? do_syscall_64+0x26/0x790 [ 80.607703][ T9463] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.613765][ T9463] ? do_syscall_64+0x26/0x790 [ 80.618426][ T9463] __x64_sys_getpeername+0x73/0xb0 [ 80.623520][ T9463] do_syscall_64+0xfa/0x790 [ 80.628095][ T9463] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.633991][ T9463] RIP: 0033:0x440349 [ 80.637871][ T9463] 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 [ 80.657455][ T9463] RSP: 002b:00007ffde1549698 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 80.665856][ T9463] RAX: ffffffffffffffda RBX: fe7f62c7329d9aaa RCX: 0000000000440349 [ 80.674252][ T9463] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 80.682229][ T9463] RBP: 65e500001d7ef6cc R08: 00007ffde1549808 R09: 00007ffde1549808 [ 80.691235][ T9463] R10: 00007ffde1549808 R11: 0000000000000246 R12: 211e267fffffffff [ 80.699461][ T9463] R13: ffff000000004d02 R14: aac8030fa4d62b9c R15: d303a55487e71188 [ 80.707432][ T9463] ================================================================== [ 80.715469][ T9463] Disabling lock debugging due to kernel taint [ 80.722201][ T9463] Kernel panic - not syncing: panic_on_warn set ... [ 80.728822][ T9463] CPU: 0 PID: 9463 Comm: syz-executor138 Tainted: G B 5.5.0-rc2-next-20191220-syzkaller #0 [ 80.740089][ T9463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.750132][ T9463] Call Trace: [ 80.753411][ T9463] dump_stack+0x197/0x210 [ 80.757722][ T9463] panic+0x2e3/0x75c [ 80.761595][ T9463] ? add_taint.cold+0x16/0x16 [ 80.766253][ T9463] ? llcp_sock_getname+0x358/0x460 [ 80.771375][ T9463] ? preempt_schedule+0x4b/0x60 [ 80.776205][ T9463] ? ___preempt_schedule+0x16/0x18 [ 80.781322][ T9463] ? trace_hardirqs_on+0x5e/0x240 [ 80.786337][ T9463] ? llcp_sock_getname+0x358/0x460 [ 80.791443][ T9463] end_report+0x47/0x4f [ 80.795581][ T9463] ? llcp_sock_getname+0x358/0x460 [ 80.800668][ T9463] __kasan_report.cold+0xe/0x41 [ 80.805499][ T9463] ? llcp_sock_getname+0x358/0x460 [ 80.810633][ T9463] kasan_report+0x12/0x20 [ 80.815023][ T9463] check_memory_region+0x134/0x1a0 [ 80.820572][ T9463] memcpy+0x24/0x50 [ 80.824376][ T9463] llcp_sock_getname+0x358/0x460 [ 80.829296][ T9463] __sys_getpeername+0x12b/0x290 [ 80.834218][ T9463] ? __ia32_sys_getsockname+0xb0/0xb0 [ 80.839577][ T9463] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 80.845114][ T9463] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 80.850569][ T9463] ? do_syscall_64+0x26/0x790 [ 80.855226][ T9463] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.862239][ T9463] ? do_syscall_64+0x26/0x790 [ 80.866900][ T9463] __x64_sys_getpeername+0x73/0xb0 [ 80.871989][ T9463] do_syscall_64+0xfa/0x790 [ 80.876478][ T9463] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.882348][ T9463] RIP: 0033:0x440349 [ 80.886222][ T9463] 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 [ 80.905805][ T9463] RSP: 002b:00007ffde1549698 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 80.914197][ T9463] RAX: ffffffffffffffda RBX: fe7f62c7329d9aaa RCX: 0000000000440349 [ 80.922147][ T9463] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 80.930096][ T9463] RBP: 65e500001d7ef6cc R08: 00007ffde1549808 R09: 00007ffde1549808 [ 80.938064][ T9463] R10: 00007ffde1549808 R11: 0000000000000246 R12: 211e267fffffffff [ 80.946796][ T9463] R13: ffff000000004d02 R14: aac8030fa4d62b9c R15: d303a55487e71188 [ 80.956315][ T9463] Kernel Offset: disabled [ 80.960644][ T9463] Rebooting in 86400 seconds..