[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 66.661034][ T25] audit: type=1800 audit(1575836873.235:25): pid=9254 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 66.681727][ T25] audit: type=1800 audit(1575836873.235:26): pid=9254 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.742996][ T25] audit: type=1800 audit(1575836873.235:27): pid=9254 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 '10.128.0.97' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.328783][ T9407] ================================================================== [ 76.337275][ T9407] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 76.344736][ T9407] Read of size 43 at addr 0000000000000000 by task syz-executor006/9407 [ 76.353304][ T9407] [ 76.355631][ T9407] CPU: 1 PID: 9407 Comm: syz-executor006 Not tainted 5.4.0-syzkaller #0 [ 76.364129][ T9407] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.374710][ T9407] Call Trace: [ 76.378101][ T9407] dump_stack+0x197/0x210 [ 76.382438][ T9407] ? llcp_sock_getname+0x358/0x460 [ 76.387621][ T9407] ? llcp_sock_getname+0x358/0x460 [ 76.393032][ T9407] __kasan_report.cold+0x5/0x41 [ 76.398300][ T9407] ? llcp_sock_getname+0x358/0x460 [ 76.403888][ T9407] kasan_report+0x12/0x20 [ 76.408491][ T9407] check_memory_region+0x134/0x1a0 [ 76.413591][ T9407] memcpy+0x24/0x50 [ 76.417391][ T9407] llcp_sock_getname+0x358/0x460 [ 76.422504][ T9407] __sys_getpeername+0x12b/0x290 [ 76.427515][ T9407] ? __ia32_sys_getsockname+0xb0/0xb0 [ 76.433533][ T9407] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.439015][ T9407] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.444775][ T9407] ? do_syscall_64+0x26/0x790 [ 76.449455][ T9407] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.455716][ T9407] ? do_syscall_64+0x26/0x790 [ 76.460411][ T9407] __x64_sys_getpeername+0x73/0xb0 [ 76.465525][ T9407] do_syscall_64+0xfa/0x790 [ 76.470157][ T9407] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.476271][ T9407] RIP: 0033:0x440349 [ 76.480184][ T9407] 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 [ 76.500294][ T9407] RSP: 002b:00007ffc8833e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 76.509544][ T9407] RAX: ffffffffffffffda RBX: fe7f62c7329d9aaa RCX: 0000000000440349 [ 76.517523][ T9407] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 76.525581][ T9407] RBP: 65e500001d7ef6cc R08: 00007ffc8833e198 R09: 00007ffc8833e198 [ 76.534523][ T9407] R10: 00007ffc8833e198 R11: 0000000000000246 R12: 211e267fffffffff [ 76.543021][ T9407] R13: ffff000000004d02 R14: aac8030fa4d62b9c R15: d303a55487e71188 [ 76.551246][ T9407] ================================================================== [ 76.559548][ T9407] Disabling lock debugging due to kernel taint [ 76.566177][ T9407] Kernel panic - not syncing: panic_on_warn set ... [ 76.572900][ T9407] CPU: 1 PID: 9407 Comm: syz-executor006 Tainted: G B 5.4.0-syzkaller #0 [ 76.582613][ T9407] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.592656][ T9407] Call Trace: [ 76.595961][ T9407] dump_stack+0x197/0x210 [ 76.600276][ T9407] panic+0x2e3/0x75c [ 76.604158][ T9407] ? add_taint.cold+0x16/0x16 [ 76.608825][ T9407] ? llcp_sock_getname+0x358/0x460 [ 76.613953][ T9407] ? preempt_schedule+0x4b/0x60 [ 76.618801][ T9407] ? ___preempt_schedule+0x16/0x18 [ 76.623982][ T9407] ? trace_hardirqs_on+0x5e/0x240 [ 76.629324][ T9407] ? llcp_sock_getname+0x358/0x460 [ 76.634543][ T9407] end_report+0x47/0x4f [ 76.639194][ T9407] ? llcp_sock_getname+0x358/0x460 [ 76.644353][ T9407] __kasan_report.cold+0xe/0x41 [ 76.649366][ T9407] ? llcp_sock_getname+0x358/0x460 [ 76.654663][ T9407] kasan_report+0x12/0x20 [ 76.659343][ T9407] check_memory_region+0x134/0x1a0 [ 76.664689][ T9407] memcpy+0x24/0x50 [ 76.668515][ T9407] llcp_sock_getname+0x358/0x460 [ 76.673461][ T9407] __sys_getpeername+0x12b/0x290 [ 76.678473][ T9407] ? __ia32_sys_getsockname+0xb0/0xb0 [ 76.684767][ T9407] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.690717][ T9407] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.696999][ T9407] ? do_syscall_64+0x26/0x790 [ 76.701680][ T9407] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.708708][ T9407] ? do_syscall_64+0x26/0x790 [ 76.713801][ T9407] __x64_sys_getpeername+0x73/0xb0 [ 76.719472][ T9407] do_syscall_64+0xfa/0x790 [ 76.724556][ T9407] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.731086][ T9407] RIP: 0033:0x440349 [ 76.735247][ T9407] 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 [ 76.756293][ T9407] RSP: 002b:00007ffc8833e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 76.765427][ T9407] RAX: ffffffffffffffda RBX: fe7f62c7329d9aaa RCX: 0000000000440349 [ 76.773402][ T9407] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 76.781475][ T9407] RBP: 65e500001d7ef6cc R08: 00007ffc8833e198 R09: 00007ffc8833e198 [ 76.789557][ T9407] R10: 00007ffc8833e198 R11: 0000000000000246 R12: 211e267fffffffff [ 76.797693][ T9407] R13: ffff000000004d02 R14: aac8030fa4d62b9c R15: d303a55487e71188 [ 76.807333][ T9407] Kernel Offset: disabled [ 76.811678][ T9407] Rebooting in 86400 seconds..