[ 63.917899][ T27] kauditd_printk_skb: 6 callbacks suppressed [ 63.917911][ T27] audit: type=1800 audit(1565589020.561:28): pid=9761 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. [ 64.559696][ T27] audit: type=1800 audit(1565589021.201:29): pid=9761 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 [ 64.580456][ T27] audit: type=1800 audit(1565589021.211:30): pid=9761 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 '10.128.0.212' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.371279][ T9916] ================================================================== [ 76.379378][ T9916] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 76.386741][ T9916] Write of size 4 at addr 0000000000000010 by task syz-executor954/9916 [ 76.395210][ T9916] [ 76.397521][ T9916] CPU: 1 PID: 9916 Comm: syz-executor954 Not tainted 5.3.0-rc3+ #158 [ 76.405560][ T9916] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.415771][ T9916] Call Trace: [ 76.419333][ T9916] dump_stack+0x172/0x1f0 [ 76.423701][ T9916] ? rxrpc_unuse_local+0x23/0x70 [ 76.428740][ T9916] ? rxrpc_unuse_local+0x23/0x70 [ 76.433684][ T9916] __kasan_report.cold+0x5/0x36 [ 76.438523][ T9916] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 76.444355][ T9916] ? rxrpc_unuse_local+0x23/0x70 [ 76.449281][ T9916] kasan_report+0x12/0x17 [ 76.453587][ T9916] check_memory_region+0x134/0x1a0 [ 76.458684][ T9916] __kasan_check_write+0x14/0x20 [ 76.463602][ T9916] rxrpc_unuse_local+0x23/0x70 [ 76.468339][ T9916] rxrpc_release+0x47d/0x840 [ 76.472909][ T9916] __sock_release+0xce/0x280 [ 76.477478][ T9916] sock_close+0x1e/0x30 [ 76.481614][ T9916] __fput+0x2ff/0x890 [ 76.485577][ T9916] ? __sock_release+0x280/0x280 [ 76.490605][ T9916] ____fput+0x16/0x20 [ 76.494579][ T9916] task_work_run+0x145/0x1c0 [ 76.499154][ T9916] do_exit+0x92f/0x2e50 [ 76.503417][ T9916] ? __sanitizer_cov_trace_const_cmp4+0x11/0x20 [ 76.509656][ T9916] ? mm_update_next_owner+0x640/0x640 [ 76.515169][ T9916] ? fd_install+0x4d/0x60 [ 76.519482][ T9916] ? __sys_socket+0x180/0x220 [ 76.524136][ T9916] ? move_addr_to_kernel+0x80/0x80 [ 76.529380][ T9916] ? __ia32_sys_fallocate+0xf0/0xf0 [ 76.534564][ T9916] do_group_exit+0x135/0x360 [ 76.539150][ T9916] __x64_sys_exit_group+0x44/0x50 [ 76.544162][ T9916] do_syscall_64+0xfd/0x6a0 [ 76.548655][ T9916] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.554530][ T9916] RIP: 0033:0x43ed68 [ 76.558414][ T9916] Code: Bad RIP value. [ 76.562456][ T9916] RSP: 002b:00007fff11e75ef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 76.570956][ T9916] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 76.578912][ T9916] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 76.586863][ T9916] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 76.594821][ T9916] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 76.602826][ T9916] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 76.610793][ T9916] ================================================================== [ 76.619539][ T9916] Kernel panic - not syncing: panic_on_warn set ... [ 76.626314][ T9916] CPU: 1 PID: 9916 Comm: syz-executor954 Tainted: G B 5.3.0-rc3+ #158 [ 76.635746][ T9916] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.645785][ T9916] Call Trace: [ 76.649064][ T9916] dump_stack+0x172/0x1f0 [ 76.653374][ T9916] panic+0x2dc/0x755 [ 76.657246][ T9916] ? add_taint.cold+0x16/0x16 [ 76.662019][ T9916] ? rxrpc_unuse_local+0x23/0x70 [ 76.667246][ T9916] ? preempt_schedule+0x4b/0x60 [ 76.672080][ T9916] ? ___preempt_schedule+0x16/0x20 [ 76.677174][ T9916] ? trace_hardirqs_on+0x5e/0x240 [ 76.682304][ T9916] ? rxrpc_unuse_local+0x23/0x70 [ 76.687252][ T9916] end_report+0x47/0x4f [ 76.691515][ T9916] ? rxrpc_unuse_local+0x23/0x70 [ 76.696439][ T9916] __kasan_report.cold+0xe/0x36 [ 76.701426][ T9916] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 76.707416][ T9916] ? rxrpc_unuse_local+0x23/0x70 [ 76.712350][ T9916] kasan_report+0x12/0x17 [ 76.716677][ T9916] check_memory_region+0x134/0x1a0 [ 76.721767][ T9916] __kasan_check_write+0x14/0x20 [ 76.726688][ T9916] rxrpc_unuse_local+0x23/0x70 [ 76.731573][ T9916] rxrpc_release+0x47d/0x840 [ 76.736153][ T9916] __sock_release+0xce/0x280 [ 76.740820][ T9916] sock_close+0x1e/0x30 [ 76.745091][ T9916] __fput+0x2ff/0x890 [ 76.749060][ T9916] ? __sock_release+0x280/0x280 [ 76.753902][ T9916] ____fput+0x16/0x20 [ 76.757868][ T9916] task_work_run+0x145/0x1c0 [ 76.762443][ T9916] do_exit+0x92f/0x2e50 [ 76.766583][ T9916] ? __sanitizer_cov_trace_const_cmp4+0x11/0x20 [ 76.772798][ T9916] ? mm_update_next_owner+0x640/0x640 [ 76.778277][ T9916] ? fd_install+0x4d/0x60 [ 76.782585][ T9916] ? __sys_socket+0x180/0x220 [ 76.787238][ T9916] ? move_addr_to_kernel+0x80/0x80 [ 76.792442][ T9916] ? __ia32_sys_fallocate+0xf0/0xf0 [ 76.797762][ T9916] do_group_exit+0x135/0x360 [ 76.802447][ T9916] __x64_sys_exit_group+0x44/0x50 [ 76.807453][ T9916] do_syscall_64+0xfd/0x6a0 [ 76.811943][ T9916] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.817938][ T9916] RIP: 0033:0x43ed68 [ 76.821948][ T9916] Code: Bad RIP value. [ 76.825993][ T9916] RSP: 002b:00007fff11e75ef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 76.834461][ T9916] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 76.842418][ T9916] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 76.850460][ T9916] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 76.858782][ T9916] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 76.866839][ T9916] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 76.876051][ T9916] Kernel Offset: disabled [ 76.880380][ T9916] Rebooting in 86400 seconds..