[ 73.350252][ T26] audit: type=1800 audit(1565558970.803:27): pid=10316 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 73.406236][ T26] audit: type=1800 audit(1565558970.913:28): pid=10316 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. [ 74.167243][ T26] audit: type=1800 audit(1565558971.673:29): pid=10316 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 [ 74.192434][ T26] audit: type=1800 audit(1565558971.683:30): pid=10316 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 '10.128.1.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 84.375731][T10470] ================================================================== [ 84.383969][T10470] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 84.392668][T10470] Write of size 4 at addr 0000000000000010 by task syz-executor216/10470 [ 84.401053][T10470] [ 84.403376][T10470] CPU: 0 PID: 10470 Comm: syz-executor216 Not tainted 5.3.0-rc3+ #157 [ 84.411531][T10470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.421586][T10470] Call Trace: [ 84.424897][T10470] dump_stack+0x172/0x1f0 [ 84.429221][T10470] ? rxrpc_unuse_local+0x23/0x70 [ 84.434140][T10470] ? rxrpc_unuse_local+0x23/0x70 [ 84.439057][T10470] __kasan_report.cold+0x5/0x36 [ 84.443900][T10470] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 84.449707][T10470] ? rxrpc_unuse_local+0x23/0x70 [ 84.454652][T10470] kasan_report+0x12/0x17 [ 84.458962][T10470] check_memory_region+0x134/0x1a0 [ 84.464052][T10470] __kasan_check_write+0x14/0x20 [ 84.468976][T10470] rxrpc_unuse_local+0x23/0x70 [ 84.473879][T10470] rxrpc_release+0x47d/0x840 [ 84.478473][T10470] __sock_release+0xce/0x280 [ 84.483157][T10470] sock_close+0x1e/0x30 [ 84.487295][T10470] __fput+0x2ff/0x890 [ 84.491261][T10470] ? __sock_release+0x280/0x280 [ 84.496095][T10470] ____fput+0x16/0x20 [ 84.500492][T10470] task_work_run+0x145/0x1c0 [ 84.505065][T10470] do_exit+0x92f/0x2e50 [ 84.509216][T10470] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 84.515376][T10470] ? mm_update_next_owner+0x640/0x640 [ 84.520731][T10470] ? fd_install+0x4d/0x60 [ 84.525067][T10470] ? __sys_socket+0x180/0x220 [ 84.529726][T10470] ? move_addr_to_kernel+0x80/0x80 [ 84.534817][T10470] ? __ia32_sys_fallocate+0xf0/0xf0 [ 84.540202][T10470] do_group_exit+0x135/0x360 [ 84.544783][T10470] __x64_sys_exit_group+0x44/0x50 [ 84.549796][T10470] do_syscall_64+0xfd/0x6a0 [ 84.555463][T10470] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.561341][T10470] RIP: 0033:0x43ed68 [ 84.565226][T10470] Code: Bad RIP value. [ 84.569264][T10470] RSP: 002b:00007ffeb79eb758 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 84.577652][T10470] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 84.585727][T10470] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 84.593682][T10470] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 84.601640][T10470] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 84.609594][T10470] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 84.617574][T10470] ================================================================== [ 84.626440][T10470] Kernel panic - not syncing: panic_on_warn set ... [ 84.633040][T10470] CPU: 0 PID: 10470 Comm: syz-executor216 Tainted: G B 5.3.0-rc3+ #157 [ 84.642554][T10470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.652587][T10470] Call Trace: [ 84.655862][T10470] dump_stack+0x172/0x1f0 [ 84.660176][T10470] panic+0x2dc/0x755 [ 84.664088][T10470] ? add_taint.cold+0x16/0x16 [ 84.668761][T10470] ? rxrpc_unuse_local+0x23/0x70 [ 84.673683][T10470] ? preempt_schedule+0x4b/0x60 [ 84.678515][T10470] ? ___preempt_schedule+0x16/0x20 [ 84.683606][T10470] ? trace_hardirqs_on+0x5e/0x240 [ 84.688606][T10470] ? rxrpc_unuse_local+0x23/0x70 [ 84.693518][T10470] end_report+0x47/0x4f [ 84.697649][T10470] ? rxrpc_unuse_local+0x23/0x70 [ 84.702577][T10470] __kasan_report.cold+0xe/0x36 [ 84.707403][T10470] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 84.713211][T10470] ? rxrpc_unuse_local+0x23/0x70 [ 84.718141][T10470] kasan_report+0x12/0x17 [ 84.722458][T10470] check_memory_region+0x134/0x1a0 [ 84.727546][T10470] __kasan_check_write+0x14/0x20 [ 84.732467][T10470] rxrpc_unuse_local+0x23/0x70 [ 84.737210][T10470] rxrpc_release+0x47d/0x840 [ 84.741784][T10470] __sock_release+0xce/0x280 [ 84.746357][T10470] sock_close+0x1e/0x30 [ 84.750497][T10470] __fput+0x2ff/0x890 [ 84.754459][T10470] ? __sock_release+0x280/0x280 [ 84.759295][T10470] ____fput+0x16/0x20 [ 84.763263][T10470] task_work_run+0x145/0x1c0 [ 84.767853][T10470] do_exit+0x92f/0x2e50 [ 84.771991][T10470] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 84.778122][T10470] ? mm_update_next_owner+0x640/0x640 [ 84.783470][T10470] ? fd_install+0x4d/0x60 [ 84.787779][T10470] ? __sys_socket+0x180/0x220 [ 84.792435][T10470] ? move_addr_to_kernel+0x80/0x80 [ 84.797522][T10470] ? __ia32_sys_fallocate+0xf0/0xf0 [ 84.802700][T10470] do_group_exit+0x135/0x360 [ 84.807278][T10470] __x64_sys_exit_group+0x44/0x50 [ 84.812288][T10470] do_syscall_64+0xfd/0x6a0 [ 84.816768][T10470] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.822632][T10470] RIP: 0033:0x43ed68 [ 84.826509][T10470] Code: Bad RIP value. [ 84.830570][T10470] RSP: 002b:00007ffeb79eb758 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 84.838963][T10470] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 84.846927][T10470] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 84.854876][T10470] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 84.862822][T10470] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 84.870766][T10470] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 84.879878][T10470] Kernel Offset: disabled [ 84.884203][T10470] Rebooting in 86400 seconds..