[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.210749][ T26] audit: type=1800 audit(1573195934.610:25): pid=8703 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.240937][ T26] audit: type=1800 audit(1573195934.610:26): pid=8703 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.268640][ T26] audit: type=1800 audit(1573195934.620:27): pid=8703 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 '10.128.1.60' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program syzkaller login: [ 64.764844][ T8870] ================================================================== [ 64.768090][ T8868] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 64.773053][ T8870] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 64.780831][ T8868] #PF: supervisor read access in kernel mode [ 64.788261][ T8870] Read of size 3 at addr 0000000000000000 by task syz-executor583/8870 [ 64.794206][ T8868] #PF: error_code(0x0000) - not-present page [ 64.802407][ T8870] [ 64.808355][ T8868] PGD 9a20a067 P4D 9a20a067 PUD 98add067 PMD 0 [ 64.810692][ T8870] CPU: 1 PID: 8870 Comm: syz-executor583 Not tainted 5.4.0-rc6-next-20191107 #0 [ 64.816922][ T8868] Oops: 0000 [#1] PREEMPT SMP KASAN [ 64.825926][ T8870] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.831107][ T8868] CPU: 0 PID: 8868 Comm: syz-executor583 Not tainted 5.4.0-rc6-next-20191107 #0 [ 64.841231][ T8870] Call Trace: [ 64.850224][ T8868] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.853495][ T8870] dump_stack+0x197/0x210 [ 64.863650][ T8868] RIP: 0010:memcpy_erms+0x6/0x10 [ 64.867957][ T8870] ? llcp_sock_getname+0x358/0x460 [ 64.872876][ T8868] 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 [ 64.877962][ T8870] ? llcp_sock_getname+0x358/0x460 [ 64.897540][ T8868] RSP: 0018:ffff88809c6bfd50 EFLAGS: 00010246 [ 64.902629][ T8870] __kasan_report.cold+0x5/0x41 [ 64.908658][ T8868] RAX: ffff88809c6bfe12 RBX: ffff88809c6bfe00 RCX: 0000000000000003 [ 64.913483][ T8870] ? llcp_sock_getname+0x358/0x460 [ 64.921424][ T8868] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff88809c6bfe12 [ 64.926509][ T8870] kasan_report+0x12/0x20 [ 64.934452][ T8868] RBP: ffff88809c6bfd70 R08: 1ffff110138d7fc2 R09: ffffed10138d7fc3 [ 64.938756][ T8870] check_memory_region+0x134/0x1a0 [ 64.946697][ T8868] R10: ffffed10138d7fc2 R11: ffff88809c6bfe14 R12: 0000000000000003 [ 64.951783][ T8870] memcpy+0x24/0x50 [ 64.959728][ T8868] R13: ffff88809c6bfe12 R14: 0000000000000000 R15: ffffffff8867a500 [ 64.963512][ T8870] llcp_sock_getname+0x358/0x460 [ 64.971454][ T8868] FS: 0000000001511880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 64.976366][ T8870] __sys_getpeername+0x12b/0x290 [ 64.985263][ T8868] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.990174][ T8870] ? __ia32_sys_getsockname+0xb0/0xb0 [ 64.996726][ T8868] CR2: 0000000000000000 CR3: 00000000928f3000 CR4: 00000000001406f0 [ 65.002078][ T8870] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 65.010013][ T8868] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.015446][ T8870] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 65.023403][ T8868] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.028851][ T8870] ? do_syscall_64+0x26/0x760 [ 65.036814][ T8868] Call Trace: [ 65.041484][ T8870] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.044740][ T8868] ? memcpy+0x46/0x50 [ 65.050781][ T8870] ? do_syscall_64+0x26/0x760 [ 65.054733][ T8868] llcp_sock_getname+0x358/0x460 [ 65.059396][ T8870] __x64_sys_getpeername+0x73/0xb0 [ 65.064305][ T8868] __sys_getpeername+0x12b/0x290 [ 65.069401][ T8870] do_syscall_64+0xfa/0x760 [ 65.074323][ T8868] ? __ia32_sys_getsockname+0xb0/0xb0 [ 65.078797][ T8870] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.084156][ T8868] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 65.090018][ T8870] RIP: 0033:0x4412b9 [ 65.095455][ T8868] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 65.099327][ T8870] 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 [ 65.104762][ T8868] ? do_syscall_64+0x26/0x760 [ 65.124335][ T8870] RSP: 002b:00007ffcd1409398 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 65.129006][ T8868] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.137380][ T8870] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 65.143432][ T8868] ? do_syscall_64+0x26/0x760 [ 65.151387][ T8870] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 executing program executing program [ 65.156041][ T8868] __x64_sys_getpeername+0x73/0xb0 [ 65.163977][ T8870] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 65.163988][ T8870] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 65.169077][ T8868] do_syscall_64+0xfa/0x760 [ 65.177019][ T8870] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 65.184971][ T8868] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.189441][ T8870] ================================================================== [ 65.197391][ T8868] RIP: 0033:0x4412b9 [ 65.209749][ T8870] Kernel panic - not syncing: panic_on_warn set ... [ 65.211299][ T8868] 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 [ 65.241309][ T8868] RSP: 002b:00007ffcd1409398 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 65.249719][ T8868] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 65.257676][ T8868] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 65.265637][ T8868] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 65.273598][ T8868] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 65.281560][ T8868] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 65.289532][ T8868] Modules linked in: [ 65.293409][ T8868] CR2: 0000000000000000 [ 65.298812][ T8870] Kernel Offset: disabled [ 65.303134][ T8870] Rebooting in 86400 seconds..