[ 75.164563][ T26] audit: type=1800 audit(1565547919.087:27): pid=10400 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 75.225788][ T26] audit: type=1800 audit(1565547919.187:28): pid=10400 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 75.969293][ T26] audit: type=1800 audit(1565547919.927:29): pid=10400 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 75.990067][ T26] audit: type=1800 audit(1565547919.927:30): pid=10400 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.684790][T10555] ================================================================== [ 85.693078][T10555] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 85.700360][T10555] Write of size 4 at addr 0000000000000010 by task syz-executor826/10555 [ 85.708780][T10555] [ 85.711106][T10555] CPU: 0 PID: 10555 Comm: syz-executor826 Not tainted 5.3.0-rc3+ #157 [ 85.719492][T10555] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.729536][T10555] Call Trace: [ 85.732920][T10555] dump_stack+0x172/0x1f0 [ 85.737236][T10555] ? rxrpc_unuse_local+0x23/0x70 [ 85.742156][T10555] ? rxrpc_unuse_local+0x23/0x70 [ 85.747109][T10555] __kasan_report.cold+0x5/0x36 [ 85.751947][T10555] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 85.757821][T10555] ? rxrpc_unuse_local+0x23/0x70 [ 85.762765][T10555] kasan_report+0x12/0x17 [ 85.767099][T10555] check_memory_region+0x134/0x1a0 [ 85.772191][T10555] __kasan_check_write+0x14/0x20 [ 85.777218][T10555] rxrpc_unuse_local+0x23/0x70 [ 85.782343][T10555] rxrpc_release+0x47d/0x840 [ 85.786947][T10555] __sock_release+0xce/0x280 [ 85.791524][T10555] sock_close+0x1e/0x30 [ 85.795697][T10555] __fput+0x2ff/0x890 [ 85.799662][T10555] ? __sock_release+0x280/0x280 [ 85.804523][T10555] ____fput+0x16/0x20 [ 85.808523][T10555] task_work_run+0x145/0x1c0 [ 85.813117][T10555] do_exit+0x92f/0x2e50 [ 85.817259][T10555] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 85.823493][T10555] ? mm_update_next_owner+0x640/0x640 [ 85.828934][T10555] ? fd_install+0x4d/0x60 [ 85.833256][T10555] ? __sys_socket+0x180/0x220 [ 85.837914][T10555] ? move_addr_to_kernel+0x80/0x80 [ 85.844013][T10555] ? __ia32_sys_fallocate+0xf0/0xf0 [ 85.849216][T10555] do_group_exit+0x135/0x360 [ 85.853813][T10555] __x64_sys_exit_group+0x44/0x50 [ 85.858907][T10555] do_syscall_64+0xfd/0x6a0 [ 85.863700][T10555] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.869601][T10555] RIP: 0033:0x43ed68 [ 85.873510][T10555] Code: Bad RIP value. [ 85.877553][T10555] RSP: 002b:00007ffd6cc66ed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 85.885940][T10555] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 85.894237][T10555] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 85.902329][T10555] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 85.910571][T10555] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 85.918638][T10555] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 85.926995][T10555] ================================================================== [ 85.936198][T10555] Kernel panic - not syncing: panic_on_warn set ... [ 85.942796][T10555] CPU: 0 PID: 10555 Comm: syz-executor826 Tainted: G B 5.3.0-rc3+ #157 [ 85.952353][T10555] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.962510][T10555] Call Trace: [ 85.965814][T10555] dump_stack+0x172/0x1f0 [ 85.970142][T10555] panic+0x2dc/0x755 [ 85.974017][T10555] ? add_taint.cold+0x16/0x16 [ 85.978704][T10555] ? rxrpc_unuse_local+0x23/0x70 [ 85.983630][T10555] ? preempt_schedule+0x4b/0x60 [ 85.988484][T10555] ? ___preempt_schedule+0x16/0x20 [ 85.993608][T10555] ? trace_hardirqs_on+0x5e/0x240 [ 85.998627][T10555] ? rxrpc_unuse_local+0x23/0x70 [ 86.003548][T10555] end_report+0x47/0x4f [ 86.007799][T10555] ? rxrpc_unuse_local+0x23/0x70 [ 86.012714][T10555] __kasan_report.cold+0xe/0x36 [ 86.017562][T10555] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 86.023380][T10555] ? rxrpc_unuse_local+0x23/0x70 [ 86.028321][T10555] kasan_report+0x12/0x17 [ 86.032996][T10555] check_memory_region+0x134/0x1a0 [ 86.038104][T10555] __kasan_check_write+0x14/0x20 [ 86.043137][T10555] rxrpc_unuse_local+0x23/0x70 [ 86.047913][T10555] rxrpc_release+0x47d/0x840 [ 86.052506][T10555] __sock_release+0xce/0x280 [ 86.057090][T10555] sock_close+0x1e/0x30 [ 86.061224][T10555] __fput+0x2ff/0x890 [ 86.065194][T10555] ? __sock_release+0x280/0x280 [ 86.070127][T10555] ____fput+0x16/0x20 [ 86.074410][T10555] task_work_run+0x145/0x1c0 [ 86.079011][T10555] do_exit+0x92f/0x2e50 [ 86.083243][T10555] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 86.101735][T10555] ? mm_update_next_owner+0x640/0x640 [ 86.107199][T10555] ? fd_install+0x4d/0x60 [ 86.111541][T10555] ? __sys_socket+0x180/0x220 [ 86.116612][T10555] ? move_addr_to_kernel+0x80/0x80 [ 86.121930][T10555] ? __ia32_sys_fallocate+0xf0/0xf0 [ 86.127291][T10555] do_group_exit+0x135/0x360 [ 86.132161][T10555] __x64_sys_exit_group+0x44/0x50 [ 86.137489][T10555] do_syscall_64+0xfd/0x6a0 [ 86.142071][T10555] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.148245][T10555] RIP: 0033:0x43ed68 [ 86.152141][T10555] Code: 00 00 44 89 c2 44 89 c0 41 83 c3 01 c1 fa 1f f7 f9 0f bf d0 41 89 c2 89 c8 0f af d1 41 83 c2 30 c1 f9 1f 45 88 11 49 83 c1 01 <41> 29 d0 f7 eb c1 fa 02 29 ca 89 d1 75 ca 41 8d 43 01 49 63 cb 4c [ 86.172798][T10555] RSP: 002b:00007ffd6cc66ed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 86.181557][T10555] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 86.189607][T10555] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 86.197847][T10555] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 86.205818][T10555] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 86.214568][T10555] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 86.224512][T10555] Kernel Offset: disabled [ 86.228944][T10555] Rebooting in 86400 seconds..