[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 69.372313][ T25] audit: type=1800 audit(1575120152.068:25): pid=9077 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 69.393833][ T25] audit: type=1800 audit(1575120152.068:26): pid=9077 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 69.449943][ T25] audit: type=1800 audit(1575120152.068:27): pid=9077 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 '10.128.15.215' (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 syzkaller login: [ 77.150488][ T9239] ================================================================== [ 77.158788][ T9239] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 77.166256][ T9239] Read of size 1 at addr 0000000000000000 by task syz-executor790/9239 [ 77.174495][ T9239] [ 77.176836][ T9239] CPU: 0 PID: 9239 Comm: syz-executor790 Not tainted 5.4.0-syzkaller #0 [ 77.185174][ T9239] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.195239][ T9239] Call Trace: executing program executing program executing program executing program executing program executing program executing program executing program [ 77.198546][ T9239] dump_stack+0x197/0x210 [ 77.202901][ T9239] ? llcp_sock_getname+0x358/0x460 [ 77.208026][ T9239] ? llcp_sock_getname+0x358/0x460 [ 77.213154][ T9239] __kasan_report.cold+0x5/0x41 [ 77.218020][ T9239] ? llcp_sock_getname+0x358/0x460 [ 77.223146][ T9239] kasan_report+0x12/0x20 [ 77.227486][ T9239] check_memory_region+0x134/0x1a0 [ 77.232613][ T9239] memcpy+0x24/0x50 [ 77.236437][ T9239] llcp_sock_getname+0x358/0x460 [ 77.236550][ T9237] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 77.241477][ T9239] __sys_getpeername+0x12b/0x290 [ 77.249265][ T9237] #PF: supervisor read access in kernel mode [ 77.255328][ T9239] ? __ia32_sys_getsockname+0xb0/0xb0 [ 77.261410][ T9237] #PF: error_code(0x0000) - not-present page [ 77.266795][ T9239] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.272804][ T9237] PGD a9940067 P4D a9940067 PUD a8bef067 PMD 0 [ 77.278377][ T9239] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.285495][ T9237] Oops: 0000 [#1] PREEMPT SMP KASAN [ 77.290947][ T9239] ? do_syscall_64+0x26/0x790 [ 77.296114][ T9237] CPU: 1 PID: 9237 Comm: syz-executor790 Not tainted 5.4.0-syzkaller #0 [ 77.300774][ T9239] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.309341][ T9237] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.315438][ T9239] ? do_syscall_64+0x26/0x790 [ 77.325644][ T9237] RIP: 0010:memcpy_erms+0x6/0x10 [ 77.330293][ T9239] __x64_sys_getpeername+0x73/0xb0 [ 77.335200][ T9237] Code: cc cc cc cc eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe [ 77.340286][ T9239] do_syscall_64+0xfa/0x790 [ 77.361233][ T9237] RSP: 0018:ffff888098537d50 EFLAGS: 00010246 [ 77.365739][ T9239] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.371776][ T9237] RAX: ffff888098537e12 RBX: ffff888098537e00 RCX: 0000000000000001 [ 77.377800][ T9239] RIP: 0033:0x4412b9 [ 77.385769][ T9237] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888098537e12 [ 77.389643][ T9239] 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 [ 77.397597][ T9237] RBP: ffff888098537d70 R08: 1ffff110130a6fc2 R09: ffffed10130a6fc3 [ 77.417167][ T9239] RSP: 002b:00007ffd9440bb98 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 77.425239][ T9237] R10: ffffed10130a6fc2 R11: ffff888098537e12 R12: 0000000000000001 [ 77.433665][ T9239] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 77.441626][ T9237] R13: ffff888098537e12 R14: 0000000000000000 R15: ffffffff88d20e40 [ 77.449590][ T9239] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 77.457689][ T9237] FS: 00000000020e1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 77.465634][ T9239] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 77.474538][ T9237] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.482485][ T9239] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 executing program executing program executing program executing program executing program executing program [ 77.489044][ T9237] CR2: 0000000000000000 CR3: 0000000099adc000 CR4: 00000000001406e0 [ 77.497080][ T9239] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 77.505053][ T9237] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.513006][ T9239] ================================================================== [ 77.520951][ T9237] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.531430][ T9239] Kernel panic - not syncing: panic_on_warn set ... [ 77.536936][ T9237] Call Trace: [ 77.546790][ T9237] ? memcpy+0x46/0x50 [ 77.550762][ T9237] llcp_sock_getname+0x358/0x460 [ 77.555782][ T9237] __sys_getpeername+0x12b/0x290 [ 77.560702][ T9237] ? __ia32_sys_getsockname+0xb0/0xb0 [ 77.566072][ T9237] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.571520][ T9237] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.576969][ T9237] ? do_syscall_64+0x26/0x790 [ 77.581629][ T9237] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.587690][ T9237] ? do_syscall_64+0x26/0x790 [ 77.592352][ T9237] __x64_sys_getpeername+0x73/0xb0 [ 77.597533][ T9237] do_syscall_64+0xfa/0x790 [ 77.602022][ T9237] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.607896][ T9237] RIP: 0033:0x4412b9 [ 77.611774][ T9237] 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 [ 77.631360][ T9237] RSP: 002b:00007ffd9440bb98 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 77.639753][ T9237] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 77.647704][ T9237] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 77.655674][ T9237] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 77.663640][ T9237] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 77.671597][ T9237] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 77.679555][ T9237] Modules linked in: [ 77.683443][ T9237] CR2: 0000000000000000 [ 77.689043][ T9239] Kernel Offset: disabled [ 77.693565][ T9239] Rebooting in 86400 seconds..