[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.101982][ T26] audit: type=1800 audit(1571466958.250:25): pid=8757 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.137315][ T26] audit: type=1800 audit(1571466958.260:26): pid=8757 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.170546][ T26] audit: type=1800 audit(1571466958.260:27): pid=8757 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 '10.128.0.98' (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 syzkaller login: [ 78.558450][ T8917] ================================================================== [ 78.568126][ T8917] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 78.576500][ T8917] Read of size 43 at addr 0000000000000000 by task syz-executor976/8917 [ 78.587276][ T8917] [ 78.589899][ T8917] CPU: 0 PID: 8917 Comm: syz-executor976 Not tainted 5.4.0-rc1+ #0 [ 78.598053][ T8917] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program executing program executing program executing program executing program executing program executing program [ 78.608902][ T8917] Call Trace: [ 78.612220][ T8917] dump_stack+0x172/0x1f0 [ 78.616912][ T8917] ? llcp_sock_getname+0x358/0x460 [ 78.622323][ T8917] ? llcp_sock_getname+0x358/0x460 [ 78.627837][ T8917] __kasan_report.cold+0x5/0x41 [ 78.633200][ T8917] ? llcp_sock_getname+0x358/0x460 [ 78.639317][ T8917] kasan_report+0x12/0x20 [ 78.644229][ T8917] check_memory_region+0x134/0x1a0 [ 78.649663][ T8917] memcpy+0x24/0x50 [ 78.653530][ T8917] llcp_sock_getname+0x358/0x460 [ 78.658945][ T8917] __sys_getpeername+0x12b/0x290 [ 78.664759][ T8917] ? __ia32_sys_getsockname+0xb0/0xb0 [ 78.670556][ T8917] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 78.677173][ T8917] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 78.682707][ T8917] ? do_syscall_64+0x26/0x760 [ 78.687562][ T8917] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.694124][ T8917] ? do_syscall_64+0x26/0x760 [ 78.699857][ T8917] __x64_sys_getpeername+0x73/0xb0 [ 78.705660][ T8917] do_syscall_64+0xfa/0x760 [ 78.710683][ T8917] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.716689][ T8917] RIP: 0033:0x4412c9 [ 78.720727][ T8917] 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 [ 78.743477][ T8917] RSP: 002b:00007ffdf58cdab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 78.752538][ T8917] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 78.762974][ T8917] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 78.771432][ T8917] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 78.781141][ T8917] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402040 [ 78.789180][ T8917] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 78.799799][ T8917] ================================================================== 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 [ 78.810748][ T8917] Disabling lock debugging due to kernel taint [ 78.828337][ T8969] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 78.829708][ T8917] Kernel panic - not syncing: panic_on_warn set ... [ 78.836668][ T8969] #PF: supervisor read access in kernel mode [ 78.849764][ T8969] #PF: error_code(0x0000) - not-present page [ 78.856348][ T8969] PGD 8e7e5067 P4D 8e7e5067 PUD 8f04d067 PMD 0 [ 78.862678][ T8969] Oops: 0000 [#1] PREEMPT SMP KASAN [ 78.868636][ T8969] CPU: 1 PID: 8969 Comm: syz-executor976 Tainted: G B 5.4.0-rc1+ #0 [ 78.878179][ T8969] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.889557][ T8969] RIP: 0010:memcpy_erms+0x6/0x10 [ 78.894512][ T8969] 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 [ 78.915514][ T8969] RSP: 0018:ffff88808c6f7d50 EFLAGS: 00010246 [ 78.922617][ T8969] RAX: ffff88808c6f7e12 RBX: ffff88808c6f7e00 RCX: 000000000000002b [ 78.931195][ T8969] RDX: 000000000000002b RSI: 0000000000000000 RDI: ffff88808c6f7e12 [ 78.939565][ T8969] RBP: ffff88808c6f7d70 R08: 1ffff110118defc2 R09: ffffed10118defc8 [ 78.948119][ T8969] R10: ffffed10118defc7 R11: ffff88808c6f7e3c R12: 000000000000002b [ 78.957282][ T8969] R13: ffff88808c6f7e12 R14: 0000000000000000 R15: ffffffff88662ee0 [ 78.967474][ T8969] FS: 0000000001bd4880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 78.981568][ T8969] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.988358][ T8969] CR2: 0000000000000000 CR3: 00000000a0ba1000 CR4: 00000000001406e0 [ 78.996917][ T8969] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.006689][ T8969] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.017579][ T8969] Call Trace: [ 79.021047][ T8969] ? memcpy+0x46/0x50 [ 79.026117][ T8969] llcp_sock_getname+0x358/0x460 [ 79.032017][ T8969] __sys_getpeername+0x12b/0x290 [ 79.037133][ T8969] ? __ia32_sys_getsockname+0xb0/0xb0 [ 79.043056][ T8969] ? __kasan_check_write+0x14/0x20 [ 79.048652][ T8969] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 79.054969][ T8969] __x64_sys_getpeername+0x73/0xb0 [ 79.060851][ T8969] do_syscall_64+0xfa/0x760 [ 79.065580][ T8969] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 79.071729][ T8969] RIP: 0033:0x4412c9 [ 79.075797][ T8969] 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 [ 79.096462][ T8969] RSP: 002b:00007ffdf58cdab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 79.106298][ T8969] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 79.115330][ T8969] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 79.123379][ T8969] RBP: 0000000000013397 R08: 00000000004002c8 R09: 00000000004002c8 [ 79.131661][ T8969] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402040 [ 79.140403][ T8969] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 79.149067][ T8969] Modules linked in: [ 79.153172][ T8969] CR2: 0000000000000000 [ 79.160025][ T8917] Kernel Offset: disabled [ 79.164964][ T8917] Rebooting in 86400 seconds..