[ 66.339547][ T27] audit: type=1800 audit(1565536079.635:27): pid=10207 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 66.385394][ T27] audit: type=1800 audit(1565536079.635:28): pid=10207 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. [ 66.917225][ T27] audit: type=1800 audit(1565536080.285:29): pid=10207 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 [ 66.941308][ T27] audit: type=1800 audit(1565536080.285:30): pid=10207 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 '10.128.0.232' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 93.767630][T10361] ================================================================== [ 93.775743][T10361] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 93.783175][T10361] Write of size 4 at addr 0000000000000010 by task syz-executor885/10361 [ 93.791558][T10361] [ 93.793867][T10361] CPU: 1 PID: 10361 Comm: syz-executor885 Not tainted 5.3.0-rc3+ #157 [ 93.801989][T10361] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.812067][T10361] Call Trace: [ 93.815347][T10361] dump_stack+0x172/0x1f0 [ 93.819661][T10361] ? rxrpc_unuse_local+0x23/0x70 [ 93.824580][T10361] ? rxrpc_unuse_local+0x23/0x70 [ 93.829493][T10361] __kasan_report.cold+0x5/0x36 [ 93.834318][T10361] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 93.840101][T10361] ? rxrpc_unuse_local+0x23/0x70 [ 93.845016][T10361] kasan_report+0x12/0x17 [ 93.849374][T10361] check_memory_region+0x134/0x1a0 [ 93.854475][T10361] __kasan_check_write+0x14/0x20 [ 93.859399][T10361] rxrpc_unuse_local+0x23/0x70 [ 93.864145][T10361] rxrpc_release+0x47d/0x840 [ 93.868716][T10361] __sock_release+0xce/0x280 [ 93.873278][T10361] sock_close+0x1e/0x30 [ 93.877413][T10361] __fput+0x2ff/0x890 [ 93.881368][T10361] ? __sock_release+0x280/0x280 [ 93.886194][T10361] ____fput+0x16/0x20 [ 93.890152][T10361] task_work_run+0x145/0x1c0 [ 93.894727][T10361] do_exit+0x92f/0x2e50 [ 93.898919][T10361] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 93.905074][T10361] ? mm_update_next_owner+0x640/0x640 [ 93.910420][T10361] ? fd_install+0x4d/0x60 [ 93.914726][T10361] ? __sys_socket+0x180/0x220 [ 93.919419][T10361] ? move_addr_to_kernel+0x80/0x80 [ 93.924516][T10361] ? __ia32_sys_fallocate+0xf0/0xf0 [ 93.929690][T10361] do_group_exit+0x135/0x360 [ 93.934255][T10361] __x64_sys_exit_group+0x44/0x50 [ 93.939260][T10361] do_syscall_64+0xfd/0x6a0 [ 93.943742][T10361] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.949610][T10361] RIP: 0033:0x43ed68 [ 93.953492][T10361] Code: Bad RIP value. [ 93.958229][T10361] RSP: 002b:00007fffa48e0bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 93.966615][T10361] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 93.974564][T10361] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 93.982606][T10361] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 93.990559][T10361] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 93.998511][T10361] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 94.006519][T10361] ================================================================== [ 94.015050][T10361] Kernel panic - not syncing: panic_on_warn set ... [ 94.021645][T10361] CPU: 1 PID: 10361 Comm: syz-executor885 Tainted: G B 5.3.0-rc3+ #157 [ 94.031192][T10361] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.041229][T10361] Call Trace: [ 94.044551][T10361] dump_stack+0x172/0x1f0 [ 94.048876][T10361] panic+0x2dc/0x755 [ 94.052756][T10361] ? add_taint.cold+0x16/0x16 [ 94.057472][T10361] ? rxrpc_unuse_local+0x23/0x70 [ 94.062400][T10361] ? preempt_schedule+0x4b/0x60 [ 94.067230][T10361] ? ___preempt_schedule+0x16/0x20 [ 94.072438][T10361] ? trace_hardirqs_on+0x5e/0x240 [ 94.077474][T10361] ? rxrpc_unuse_local+0x23/0x70 [ 94.082399][T10361] end_report+0x47/0x4f [ 94.086538][T10361] ? rxrpc_unuse_local+0x23/0x70 [ 94.091453][T10361] __kasan_report.cold+0xe/0x36 [ 94.096285][T10361] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 94.102067][T10361] ? rxrpc_unuse_local+0x23/0x70 [ 94.107087][T10361] kasan_report+0x12/0x17 [ 94.111395][T10361] check_memory_region+0x134/0x1a0 [ 94.116481][T10361] __kasan_check_write+0x14/0x20 [ 94.121390][T10361] rxrpc_unuse_local+0x23/0x70 [ 94.126128][T10361] rxrpc_release+0x47d/0x840 [ 94.130694][T10361] __sock_release+0xce/0x280 [ 94.135259][T10361] sock_close+0x1e/0x30 [ 94.139391][T10361] __fput+0x2ff/0x890 [ 94.143346][T10361] ? __sock_release+0x280/0x280 [ 94.148179][T10361] ____fput+0x16/0x20 [ 94.152138][T10361] task_work_run+0x145/0x1c0 [ 94.156709][T10361] do_exit+0x92f/0x2e50 [ 94.160966][T10361] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 94.167258][T10361] ? mm_update_next_owner+0x640/0x640 [ 94.172712][T10361] ? fd_install+0x4d/0x60 [ 94.177045][T10361] ? __sys_socket+0x180/0x220 [ 94.181715][T10361] ? move_addr_to_kernel+0x80/0x80 [ 94.186806][T10361] ? __ia32_sys_fallocate+0xf0/0xf0 [ 94.192039][T10361] do_group_exit+0x135/0x360 [ 94.196616][T10361] __x64_sys_exit_group+0x44/0x50 [ 94.201629][T10361] do_syscall_64+0xfd/0x6a0 [ 94.206121][T10361] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.211995][T10361] RIP: 0033:0x43ed68 [ 94.215884][T10361] Code: Bad RIP value. [ 94.219927][T10361] RSP: 002b:00007fffa48e0bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 94.228460][T10361] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 94.236429][T10361] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 94.244394][T10361] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 94.252372][T10361] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 94.260333][T10361] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 94.269300][T10361] Kernel Offset: disabled [ 94.273623][T10361] Rebooting in 86400 seconds..