[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.253536][ T26] audit: type=1800 audit(1570853415.334:25): pid=8586 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.298636][ T26] audit: type=1800 audit(1570853415.334:26): pid=8586 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.334123][ T26] audit: type=1800 audit(1570853415.344:27): pid=8586 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 '10.128.10.24' (ECDSA) to the list of known hosts. syzkaller login: [ 64.324106][ T8749] IPVS: ftp: loaded support on port[0] = 21 [ 64.333419][ T8752] IPVS: ftp: loaded support on port[0] = 21 [ 64.334200][ T8751] IPVS: ftp: loaded support on port[0] = 21 [ 64.340025][ T8750] IPVS: ftp: loaded support on port[0] = 21 [ 64.354453][ T8746] IPVS: ftp: loaded support on port[0] = 21 [ 64.363359][ T8753] IPVS: ftp: loaded support on port[0] = 21 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 [ 64.544196][ T8767] ================================================================== [ 64.552504][ T8767] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x358/0x460 [ 64.559979][ T8767] Read of size 63 at addr 0000000000000000 by task syz-executor144/8767 [ 64.568307][ T8767] [ 64.570648][ T8767] CPU: 1 PID: 8767 Comm: syz-executor144 Not tainted 5.4.0-rc1+ #0 [ 64.578537][ T8767] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.588600][ T8767] Call Trace: executing program executing program executing program executing program executing program executing program executing program [ 64.591897][ T8767] dump_stack+0x172/0x1f0 [ 64.596239][ T8767] ? llcp_sock_getname+0x358/0x460 [ 64.601359][ T8767] ? llcp_sock_getname+0x358/0x460 [ 64.606487][ T8767] __kasan_report.cold+0x5/0x41 [ 64.611351][ T8767] ? llcp_sock_getname+0x358/0x460 [ 64.616491][ T8767] kasan_report+0x12/0x20 [ 64.620836][ T8767] check_memory_region+0x134/0x1a0 [ 64.625961][ T8767] memcpy+0x24/0x50 [ 64.629791][ T8767] llcp_sock_getname+0x358/0x460 [ 64.634746][ T8767] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 64.640657][ T8767] sock_getsockopt+0x14a7/0x205e [ 64.645644][ T8767] ? release_sock+0x156/0x1c0 [ 64.650343][ T8767] ? sk_get_meminfo+0x4d0/0x4d0 [ 64.655206][ T8767] ? _raw_spin_unlock_bh+0x31/0x40 [ 64.660338][ T8767] ? ___might_sleep+0x163/0x2c0 [ 64.665202][ T8767] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 64.671454][ T8767] ? aa_label_sk_perm+0x91/0xf0 [ 64.676339][ T8767] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 64.681998][ T8767] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 64.687570][ T8767] ? apparmor_socket_getsockopt+0x22/0x30 [ 64.693308][ T8767] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.699565][ T8767] ? security_socket_getsockopt+0x8d/0xc0 [ 64.705305][ T8767] __sys_getsockopt+0x2c9/0x310 [ 64.710179][ T8767] ? kernel_accept+0x310/0x310 [ 64.714958][ T8767] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 64.720426][ T8767] ? do_syscall_64+0x26/0x760 [ 64.725118][ T8767] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.731194][ T8767] ? do_syscall_64+0x26/0x760 [ 64.735889][ T8767] __x64_sys_getsockopt+0xbe/0x150 [ 64.741023][ T8767] do_syscall_64+0xfa/0x760 [ 64.745546][ T8767] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.751441][ T8767] RIP: 0033:0x4414b9 [ 64.755347][ T8767] Code: e8 0c 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 6b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.774975][ T8767] RSP: 002b:00007ffe1f3bb558 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 [ 64.783417][ T8767] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004414b9 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.791404][ T8767] RDX: 000000000000001c RSI: 0000000000000001 RDI: 0000000000000004 [ 64.799386][ T8767] RBP: 0000000000000003 R08: 0000000020000140 R09: 0000000100000000 [ 64.807367][ T8767] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000a88850 [ 64.815352][ T8767] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 [ 64.823346][ T8767] ================================================================== [ 64.831413][ T8767] Disabling lock debugging due to kernel taint 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 [ 64.891195][ T8767] Kernel panic - not syncing: panic_on_warn set ... [ 64.897843][ T8767] CPU: 1 PID: 8767 Comm: syz-executor144 Tainted: G B 5.4.0-rc1+ #0 [ 64.907117][ T8767] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.917295][ T8767] Call Trace: [ 64.920601][ T8767] dump_stack+0x172/0x1f0 [ 64.924945][ T8767] panic+0x2dc/0x755 [ 64.928843][ T8767] ? add_taint.cold+0x16/0x16 [ 64.933530][ T8767] ? llcp_sock_getname+0x358/0x460 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 [ 64.938654][ T8767] ? preempt_schedule+0x4b/0x60 [ 64.943508][ T8767] ? ___preempt_schedule+0x16/0x20 [ 64.948631][ T8767] ? trace_hardirqs_on+0x5e/0x240 [ 64.953663][ T8767] ? llcp_sock_getname+0x358/0x460 [ 64.958776][ T8767] end_report+0x47/0x4f [ 64.962932][ T8767] ? llcp_sock_getname+0x358/0x460 [ 64.968041][ T8767] __kasan_report.cold+0xe/0x41 [ 64.972896][ T8767] ? llcp_sock_getname+0x358/0x460 [ 64.978015][ T8767] kasan_report+0x12/0x20 [ 64.982348][ T8767] check_memory_region+0x134/0x1a0 [ 64.987462][ T8767] memcpy+0x24/0x50 [ 64.991276][ T8767] llcp_sock_getname+0x358/0x460 [ 64.996221][ T8767] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 65.002125][ T8767] sock_getsockopt+0x14a7/0x205e [ 65.007074][ T8767] ? release_sock+0x156/0x1c0 [ 65.011766][ T8767] ? sk_get_meminfo+0x4d0/0x4d0 [ 65.016636][ T8767] ? _raw_spin_unlock_bh+0x31/0x40 [ 65.021779][ T8767] ? ___might_sleep+0x163/0x2c0 [ 65.026640][ T8767] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 65.032888][ T8767] ? aa_label_sk_perm+0x91/0xf0 [ 65.037743][ T8767] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 65.043379][ T8767] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 65.048936][ T8767] ? apparmor_socket_getsockopt+0x22/0x30 [ 65.054665][ T8767] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.060914][ T8767] ? security_socket_getsockopt+0x8d/0xc0 [ 65.066652][ T8767] __sys_getsockopt+0x2c9/0x310 [ 65.071511][ T8767] ? kernel_accept+0x310/0x310 [ 65.076280][ T8767] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 65.081752][ T8767] ? do_syscall_64+0x26/0x760 [ 65.086434][ T8767] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.092506][ T8767] ? do_syscall_64+0x26/0x760 [ 65.097191][ T8767] __x64_sys_getsockopt+0xbe/0x150 [ 65.102309][ T8767] do_syscall_64+0xfa/0x760 [ 65.106823][ T8767] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.112710][ T8767] RIP: 0033:0x4414b9 [ 65.116605][ T8767] Code: e8 0c 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 6b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 65.136206][ T8767] RSP: 002b:00007ffe1f3bb558 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 [ 65.144618][ T8767] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004414b9 [ 65.152596][ T8767] RDX: 000000000000001c RSI: 0000000000000001 RDI: 0000000000000004 [ 65.160573][ T8767] RBP: 0000000000000003 R08: 0000000020000140 R09: 0000000100000000 [ 65.168548][ T8767] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000a88850 [ 65.176521][ T8767] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 [ 65.185729][ T8767] Kernel Offset: disabled [ 65.190048][ T8767] Rebooting in 86400 seconds..