[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.341690][ T25] audit: type=1800 audit(1575086066.271:25): pid=8832 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.361739][ T25] audit: type=1800 audit(1575086066.271:26): pid=8832 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.423150][ T25] audit: type=1800 audit(1575086066.271:27): pid=8832 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 '10.128.0.223' (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: [ 69.206902][ T8994] ================================================================== [ 69.215261][ T8994] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 69.222778][ T8994] Read of size 1 at addr 0000000000000000 by task syz-executor388/8994 [ 69.231056][ T8994] [ 69.233431][ T8994] CPU: 1 PID: 8994 Comm: syz-executor388 Not tainted 5.4.0-syzkaller #0 [ 69.241764][ T8994] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.251848][ T8994] Call Trace: executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.255176][ T8994] dump_stack+0x197/0x210 [ 69.259539][ T8994] ? llcp_sock_getname+0x358/0x460 [ 69.264666][ T8994] ? llcp_sock_getname+0x358/0x460 [ 69.269799][ T8994] __kasan_report.cold+0x5/0x41 [ 69.274685][ T8994] ? llcp_sock_getname+0x358/0x460 [ 69.279836][ T8994] kasan_report+0x12/0x20 [ 69.284189][ T8994] check_memory_region+0x134/0x1a0 [ 69.289334][ T8994] memcpy+0x24/0x50 [ 69.293177][ T8994] llcp_sock_getname+0x358/0x460 [ 69.298138][ T8994] __sys_getpeername+0x12b/0x290 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.303105][ T8994] ? __ia32_sys_getsockname+0xb0/0xb0 [ 69.308733][ T8994] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.314228][ T8994] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.319827][ T8994] ? do_syscall_64+0x26/0x790 [ 69.324532][ T8994] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.330719][ T8994] ? do_syscall_64+0x26/0x790 [ 69.335519][ T8994] __x64_sys_getpeername+0x73/0xb0 [ 69.340627][ T8994] do_syscall_64+0xfa/0x790 [ 69.345137][ T8994] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.351039][ T8994] 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 [ 69.354940][ T8994] 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 [ 69.374549][ T8994] RSP: 002b:00007fff1e1ff748 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 69.382981][ T8994] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 69.391222][ T8994] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 69.399202][ T8994] 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 [ 69.407706][ T8994] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 69.415692][ T8994] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 69.423695][ T8994] ================================================================== [ 69.431756][ T8994] Disabling lock debugging due to kernel taint [ 69.440422][ T8994] Kernel panic - not syncing: panic_on_warn set ... [ 69.443978][ T9047] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 69.454809][ T9047] #PF: supervisor read access in kernel mode [ 69.460768][ T9047] #PF: error_code(0x0000) - not-present page [ 69.466720][ T9047] PGD a00f9067 P4D a00f9067 PUD 94ea4067 PMD 0 [ 69.472964][ T9047] Oops: 0000 [#1] PREEMPT SMP KASAN [ 69.478155][ T9047] CPU: 0 PID: 9047 Comm: syz-executor388 Tainted: G B 5.4.0-syzkaller #0 [ 69.487866][ T9047] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.497928][ T9047] RIP: 0010:memcpy_erms+0x6/0x10 [ 69.502851][ T9047] 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 [ 69.523042][ T9047] RSP: 0018:ffff88808f58fd50 EFLAGS: 00010246 [ 69.529092][ T9047] RAX: ffff88808f58fe12 RBX: ffff88808f58fe00 RCX: 0000000000000001 [ 69.537045][ T9047] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88808f58fe12 [ 69.544997][ T9047] RBP: ffff88808f58fd70 R08: 1ffff11011eb1fc2 R09: ffffed1011eb1fc3 [ 69.552955][ T9047] R10: ffffed1011eb1fc2 R11: ffff88808f58fe12 R12: 0000000000000001 [ 69.560908][ T9047] R13: ffff88808f58fe12 R14: 0000000000000000 R15: ffffffff88d20e40 [ 69.568864][ T9047] FS: 0000000000af2880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 69.577788][ T9047] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.584376][ T9047] CR2: 0000000000000000 CR3: 00000000a81c9000 CR4: 00000000001406f0 [ 69.592349][ T9047] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.600305][ T9047] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.608254][ T9047] Call Trace: [ 69.611531][ T9047] ? memcpy+0x46/0x50 [ 69.615502][ T9047] llcp_sock_getname+0x358/0x460 [ 69.620422][ T9047] __sys_getpeername+0x12b/0x290 [ 69.625341][ T9047] ? __ia32_sys_getsockname+0xb0/0xb0 [ 69.630703][ T9047] ? up_read+0x1cd/0x810 [ 69.634933][ T9047] ? __kasan_check_write+0x14/0x20 [ 69.640029][ T9047] ? switch_fpu_return+0x1fa/0x4f0 [ 69.645123][ T9047] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 69.651170][ T9047] __x64_sys_getpeername+0x73/0xb0 [ 69.656267][ T9047] do_syscall_64+0xfa/0x790 [ 69.660754][ T9047] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.666626][ T9047] RIP: 0033:0x4412b9 [ 69.670502][ T9047] 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 [ 69.690088][ T9047] RSP: 002b:00007fff1e1ff748 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 69.698481][ T9047] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 69.706433][ T9047] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 69.714396][ T9047] RBP: 0000000000010e17 R08: 00000000004002c8 R09: 00000000004002c8 [ 69.722348][ T9047] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 69.730300][ T9047] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 69.738255][ T9047] Modules linked in: [ 69.742129][ T9047] CR2: 0000000000000000 [ 69.747456][ T8994] Kernel Offset: disabled [ 69.751820][ T8994] Rebooting in 86400 seconds..