[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.143018][ T26] audit: type=1800 audit(1571769704.364:25): pid=8681 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.187766][ T26] audit: type=1800 audit(1571769704.364:26): pid=8681 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.221391][ T26] audit: type=1800 audit(1571769704.364:27): pid=8681 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 '10.128.1.41' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 69.288290][ T8843] ================================================================== [ 69.296579][ T8843] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 69.304046][ T8843] Read of size 1 at addr 0000000000000000 by task syz-executor011/8843 [ 69.312275][ T8843] [ 69.314617][ T8843] CPU: 1 PID: 8843 Comm: syz-executor011 Not tainted 5.4.0-rc4+ #0 [ 69.322501][ T8843] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.332559][ T8843] Call Trace: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.335866][ T8843] dump_stack+0x172/0x1f0 [ 69.340218][ T8843] ? llcp_sock_getname+0x358/0x460 [ 69.345340][ T8843] ? llcp_sock_getname+0x358/0x460 [ 69.350468][ T8843] __kasan_report.cold+0x5/0x41 [ 69.355338][ T8843] ? llcp_sock_getname+0x358/0x460 [ 69.360458][ T8843] kasan_report+0x12/0x20 [ 69.364807][ T8843] check_memory_region+0x134/0x1a0 [ 69.369927][ T8843] memcpy+0x24/0x50 [ 69.373752][ T8843] llcp_sock_getname+0x358/0x460 [ 69.378708][ T8843] __sys_getpeername+0x12b/0x290 [ 69.383654][ T8843] ? __ia32_sys_getsockname+0xb0/0xb0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.389049][ T8843] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 69.394519][ T8843] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 69.399992][ T8843] ? do_syscall_64+0x26/0x760 [ 69.404682][ T8843] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.410752][ T8843] ? do_syscall_64+0x26/0x760 [ 69.415450][ T8843] __x64_sys_getpeername+0x73/0xb0 [ 69.420573][ T8843] do_syscall_64+0xfa/0x760 [ 69.425175][ T8843] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.431071][ T8843] RIP: 0033:0x4412b9 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.434980][ T8843] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.454592][ T8843] RSP: 002b:00007fff4b44fdc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 69.463019][ T8843] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 69.470997][ T8843] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 69.478973][ T8843] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.486946][ T8843] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 69.494921][ T8843] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 69.502912][ T8843] ================================================================== [ 69.511056][ T8843] Disabling lock debugging due to kernel taint [ 69.523810][ T8843] Kernel panic - not syncing: panic_on_warn set ... [ 69.530451][ T8843] CPU: 1 PID: 8843 Comm: syz-executor011 Tainted: G B 5.4.0-rc4+ #0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.539725][ T8843] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.549786][ T8843] Call Trace: [ 69.553087][ T8843] dump_stack+0x172/0x1f0 [ 69.557423][ T8843] panic+0x2e3/0x75c [ 69.561326][ T8843] ? add_taint.cold+0x16/0x16 [ 69.566010][ T8843] ? llcp_sock_getname+0x358/0x460 [ 69.571129][ T8843] ? preempt_schedule+0x4b/0x60 [ 69.575985][ T8843] ? ___preempt_schedule+0x16/0x20 [ 69.581098][ T8843] ? trace_hardirqs_on+0x5e/0x240 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.586132][ T8843] ? llcp_sock_getname+0x358/0x460 [ 69.591337][ T8843] end_report+0x47/0x4f [ 69.595506][ T8843] ? llcp_sock_getname+0x358/0x460 [ 69.600652][ T8843] __kasan_report.cold+0xe/0x41 [ 69.605513][ T8843] ? llcp_sock_getname+0x358/0x460 [ 69.610629][ T8843] kasan_report+0x12/0x20 [ 69.614964][ T8843] check_memory_region+0x134/0x1a0 [ 69.620102][ T8843] memcpy+0x24/0x50 [ 69.623927][ T8843] llcp_sock_getname+0x358/0x460 [ 69.628872][ T8843] __sys_getpeername+0x12b/0x290 [ 69.633821][ T8843] ? __ia32_sys_getsockname+0xb0/0xb0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.639242][ T8843] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 69.644711][ T8843] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 69.650175][ T8843] ? do_syscall_64+0x26/0x760 [ 69.654857][ T8843] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.660932][ T8843] ? do_syscall_64+0x26/0x760 [ 69.665620][ T8843] __x64_sys_getpeername+0x73/0xb0 [ 69.670735][ T8843] do_syscall_64+0xfa/0x760 [ 69.675247][ T8843] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.681139][ T8843] RIP: 0033:0x4412b9 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.685040][ T8843] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.704646][ T8843] RSP: 002b:00007fff4b44fdc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 69.713059][ T8843] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 69.721032][ T8843] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 69.729011][ T8843] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 executing program executing program executing program executing program [ 69.737003][ T8843] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 69.744974][ T8843] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 69.754199][ T8843] Kernel Offset: disabled [ 69.758570][ T8843] Rebooting in 86400 seconds..