[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.513001][ T26] audit: type=1800 audit(1571289610.355:25): pid=8554 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.548297][ T26] audit: type=1800 audit(1571289610.365:26): pid=8554 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.574000][ T26] audit: type=1800 audit(1571289610.365:27): pid=8554 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 '10.128.10.37' (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 syzkaller login: [ 74.686604][ T8713] ================================================================== [ 74.694908][ T8713] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 74.702369][ T8713] Read of size 1 at addr 0000000000000000 by task syz-executor026/8713 [ 74.710597][ T8713] [ 74.712931][ T8713] CPU: 1 PID: 8713 Comm: syz-executor026 Not tainted 5.4.0-rc1+ #0 [ 74.720812][ T8713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.730862][ T8713] Call Trace: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 74.734164][ T8713] dump_stack+0x172/0x1f0 [ 74.738508][ T8713] ? llcp_sock_getname+0x358/0x460 [ 74.743631][ T8713] ? llcp_sock_getname+0x358/0x460 [ 74.748748][ T8713] __kasan_report.cold+0x5/0x41 [ 74.753607][ T8713] ? llcp_sock_getname+0x358/0x460 [ 74.758727][ T8713] kasan_report+0x12/0x20 [ 74.763062][ T8713] check_memory_region+0x134/0x1a0 [ 74.768176][ T8713] memcpy+0x24/0x50 [ 74.771992][ T8713] llcp_sock_getname+0x358/0x460 [ 74.776934][ T8713] __sys_getpeername+0x12b/0x290 [ 74.781880][ T8713] ? __ia32_sys_getsockname+0xb0/0xb0 [ 74.787270][ T8713] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 74.792735][ T8713] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 74.798200][ T8713] ? do_syscall_64+0x26/0x760 [ 74.802878][ T8713] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.808947][ T8713] ? do_syscall_64+0x26/0x760 [ 74.813633][ T8713] __x64_sys_getpeername+0x73/0xb0 [ 74.818755][ T8713] do_syscall_64+0xfa/0x760 [ 74.823264][ T8713] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.829165][ T8713] RIP: 0033:0x4412b9 [ 74.833062][ T8713] 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 [ 74.852672][ T8713] RSP: 002b:00007fff2adba268 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 74.861089][ T8713] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 74.869062][ T8713] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 74.877036][ T8713] 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 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 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 [ 74.885007][ T8713] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 74.892976][ T8713] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 74.900962][ T8713] ================================================================== [ 74.909020][ T8713] Disabling lock debugging due to kernel taint [ 74.920179][ T8779] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 74.928392][ T8779] #PF: supervisor read access in kernel mode executing program executing program executing program executing program executing program executing program executing program executing program [ 74.934362][ T8779] #PF: error_code(0x0000) - not-present page [ 74.940329][ T8779] PGD 987c9067 P4D 987c9067 PUD 82400067 PMD 0 [ 74.946576][ T8779] Oops: 0000 [#1] PREEMPT SMP KASAN [ 74.951772][ T8779] CPU: 1 PID: 8779 Comm: syz-executor026 Tainted: G B 5.4.0-rc1+ #0 [ 74.958038][ T8713] Kernel panic - not syncing: panic_on_warn set ... [ 74.961045][ T8779] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.977678][ T8779] RIP: 0010:memcpy_erms+0x6/0x10 [ 74.982634][ T8779] Code: 90 90 90 90 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 [ 75.002222][ T8779] RSP: 0018:ffff888081b57d50 EFLAGS: 00010246 [ 75.008274][ T8779] RAX: ffff888081b57e12 RBX: ffff888081b57e00 RCX: 0000000000000001 [ 75.016226][ T8779] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888081b57e12 [ 75.024199][ T8779] RBP: ffff888081b57d70 R08: 1ffff1101036afc2 R09: ffffed101036afc3 [ 75.032152][ T8779] R10: ffffed101036afc2 R11: ffff888081b57e12 R12: 0000000000000001 [ 75.040108][ T8779] R13: ffff888081b57e12 R14: 0000000000000000 R15: ffffffff88660be0 [ 75.048074][ T8779] FS: 000000000117d880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 75.057002][ T8779] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.063567][ T8779] CR2: 0000000000000000 CR3: 000000009a547000 CR4: 00000000001406e0 [ 75.071527][ T8779] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.079485][ T8779] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.087434][ T8779] Call Trace: [ 75.090706][ T8779] ? memcpy+0x46/0x50 [ 75.094688][ T8779] llcp_sock_getname+0x358/0x460 [ 75.099618][ T8779] __sys_getpeername+0x12b/0x290 [ 75.104541][ T8779] ? __ia32_sys_getsockname+0xb0/0xb0 [ 75.109896][ T8779] ? up_read+0x1d2/0x810 [ 75.114125][ T8779] ? __kasan_check_write+0x14/0x20 [ 75.119218][ T8779] ? switch_fpu_return+0x1fa/0x4f0 [ 75.124312][ T8779] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 75.130363][ T8779] __x64_sys_getpeername+0x73/0xb0 [ 75.135458][ T8779] do_syscall_64+0xfa/0x760 [ 75.139948][ T8779] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.145906][ T8779] RIP: 0033:0x4412b9 [ 75.149785][ T8779] 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 [ 75.170238][ T8779] RSP: 002b:00007fff2adba268 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 75.178632][ T8779] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 75.186587][ T8779] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 75.196380][ T8779] RBP: 000000000001244e R08: 00000000004002c8 R09: 00000000004002c8 [ 75.204348][ T8779] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 75.212312][ T8779] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 75.220811][ T8779] Modules linked in: [ 75.224699][ T8779] CR2: 0000000000000000 [ 75.230377][ T8713] Kernel Offset: disabled [ 75.234714][ T8713] Rebooting in 86400 seconds..