[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.210526][ T26] audit: type=1800 audit(1571639243.452:25): pid=8629 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.253989][ T26] audit: type=1800 audit(1571639243.462:26): pid=8629 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.300476][ T26] audit: type=1800 audit(1571639243.462:27): pid=8629 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 '10.128.0.81' (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: [ 67.421603][ T8791] ================================================================== [ 67.430054][ T8791] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 67.437872][ T8791] Read of size 3 at addr 0000000000000000 by task syz-executor552/8791 [ 67.446108][ T8791] [ 67.448466][ T8791] CPU: 0 PID: 8791 Comm: syz-executor552 Not tainted 5.4.0-rc3+ #0 [ 67.456360][ T8791] 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 executing program executing program executing program [ 67.469547][ T8791] Call Trace: [ 67.472886][ T8791] dump_stack+0x172/0x1f0 [ 67.477243][ T8791] ? llcp_sock_getname+0x358/0x460 [ 67.482389][ T8791] ? llcp_sock_getname+0x358/0x460 [ 67.487782][ T8791] __kasan_report.cold+0x5/0x41 [ 67.492654][ T8791] ? llcp_sock_getname+0x358/0x460 [ 67.497789][ T8791] kasan_report+0x12/0x20 [ 67.502143][ T8791] check_memory_region+0x134/0x1a0 [ 67.507535][ T8791] memcpy+0x24/0x50 [ 67.511366][ T8791] llcp_sock_getname+0x358/0x460 [ 67.516329][ T8791] __sys_getpeername+0x12b/0x290 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 67.521307][ T8791] ? __ia32_sys_getsockname+0xb0/0xb0 [ 67.526707][ T8791] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 67.532178][ T8791] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 67.537752][ T8791] ? do_syscall_64+0x26/0x760 [ 67.542530][ T8791] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.548875][ T8791] ? do_syscall_64+0x26/0x760 [ 67.553578][ T8791] __x64_sys_getpeername+0x73/0xb0 [ 67.558749][ T8791] do_syscall_64+0xfa/0x760 [ 67.563301][ T8791] entry_SYSCALL_64_after_hwframe+0x49/0xbe executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 67.569226][ T8791] RIP: 0033:0x4412b9 [ 67.573229][ T8791] 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 [ 67.593685][ T8791] RSP: 002b:00007ffd1d160098 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 67.602109][ T8791] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 67.610099][ T8791] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 67.618349][ T8791] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 67.626418][ T8791] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 67.634400][ T8791] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 67.642750][ T8791] ================================================================== [ 67.650825][ T8791] Disabling lock debugging due to kernel taint [ 67.660703][ T8848] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 67.663875][ T8791] Kernel panic - not syncing: panic_on_warn set ... [ 67.668552][ T8848] #PF: supervisor read access in kernel mode [ 67.681096][ T8848] #PF: error_code(0x0000) - not-present page [ 67.687143][ T8848] PGD a0e8f067 P4D a0e8f067 PUD a9229067 PMD 0 [ 67.693379][ T8848] Oops: 0000 [#1] PREEMPT SMP KASAN [ 67.698564][ T8848] CPU: 1 PID: 8848 Comm: syz-executor552 Tainted: G B 5.4.0-rc3+ #0 [ 67.707922][ T8848] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.717997][ T8848] RIP: 0010:memcpy_erms+0x6/0x10 [ 67.722932][ T8848] 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 [ 67.742621][ T8848] RSP: 0018:ffff8880a1e6fd50 EFLAGS: 00010246 [ 67.749111][ T8848] RAX: ffff8880a1e6fe12 RBX: ffff8880a1e6fe00 RCX: 0000000000000003 [ 67.757069][ T8848] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880a1e6fe12 [ 67.765025][ T8848] RBP: ffff8880a1e6fd70 R08: 1ffff110143cdfc2 R09: ffffed10143cdfc3 [ 67.772983][ T8848] R10: ffffed10143cdfc2 R11: ffff8880a1e6fe14 R12: 0000000000000003 [ 67.781031][ T8848] R13: ffff8880a1e6fe12 R14: 0000000000000000 R15: ffffffff886611e0 [ 67.788994][ T8848] FS: 0000000001068880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 67.797913][ T8848] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.804484][ T8848] CR2: 0000000000000000 CR3: 0000000099f0e000 CR4: 00000000001406e0 [ 67.812536][ T8848] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.820846][ T8848] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.828860][ T8848] Call Trace: [ 67.832158][ T8848] ? memcpy+0x46/0x50 [ 67.836312][ T8848] llcp_sock_getname+0x358/0x460 [ 67.841244][ T8848] __sys_getpeername+0x12b/0x290 [ 67.846171][ T8848] ? __ia32_sys_getsockname+0xb0/0xb0 [ 67.851642][ T8848] ? up_read+0x1d2/0x810 [ 67.855916][ T8848] ? __kasan_check_write+0x14/0x20 [ 67.861038][ T8848] ? switch_fpu_return+0x1fa/0x4f0 [ 67.866170][ T8848] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 67.872247][ T8848] __x64_sys_getpeername+0x73/0xb0 [ 67.877438][ T8848] do_syscall_64+0xfa/0x760 [ 67.882041][ T8848] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.888065][ T8848] RIP: 0033:0x4412b9 [ 67.892125][ T8848] 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 [ 67.911823][ T8848] RSP: 002b:00007ffd1d160098 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 [ 67.920342][ T8848] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 67.928308][ T8848] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 67.936278][ T8848] RBP: 0000000000010725 R08: 00000000004002c8 R09: 00000000004002c8 [ 67.944763][ T8848] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402030 [ 67.952815][ T8848] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 67.960872][ T8848] Modules linked in: [ 67.964845][ T8848] CR2: 0000000000000000 [ 67.970491][ T8791] Kernel Offset: disabled [ 67.975128][ T8791] Rebooting in 86400 seconds..