[ 66.861300][ T26] audit: type=1800 audit(1565606452.472:27): pid=10033 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 66.909302][ T26] audit: type=1800 audit(1565606452.572:28): pid=10033 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. [ 67.681333][ T26] audit: type=1800 audit(1565606453.342:29): pid=10033 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 [ 67.701765][ T26] audit: type=1800 audit(1565606453.342:30): pid=10033 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 '10.128.0.178' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.683919][T10185] ================================================================== [ 76.692014][T10185] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 76.699285][T10185] Write of size 4 at addr 0000000000000010 by task syz-executor498/10185 [ 76.707684][T10185] [ 76.710010][T10185] CPU: 0 PID: 10185 Comm: syz-executor498 Not tainted 5.3.0-rc3-next-20190809 #63 [ 76.719173][T10185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.729204][T10185] Call Trace: [ 76.732475][T10185] dump_stack+0x172/0x1f0 [ 76.736784][T10185] ? rxrpc_unuse_local+0x23/0x70 [ 76.741696][T10185] ? rxrpc_unuse_local+0x23/0x70 [ 76.746614][T10185] __kasan_report.cold+0x5/0x36 [ 76.751440][T10185] ? _raw_read_unlock_irqrestore+0xd1/0xe0 [ 76.757216][T10185] ? rxrpc_unuse_local+0x23/0x70 [ 76.762131][T10185] kasan_report+0x12/0x17 [ 76.766436][T10185] check_memory_region+0x134/0x1a0 [ 76.771523][T10185] __kasan_check_write+0x14/0x20 [ 76.776526][T10185] rxrpc_unuse_local+0x23/0x70 [ 76.781267][T10185] rxrpc_release+0x47d/0x840 [ 76.785841][T10185] __sock_release+0xce/0x280 [ 76.790406][T10185] sock_close+0x1e/0x30 [ 76.794540][T10185] __fput+0x2ff/0x890 [ 76.798504][T10185] ? __sock_release+0x280/0x280 [ 76.803332][T10185] ____fput+0x16/0x20 [ 76.807403][T10185] task_work_run+0x145/0x1c0 [ 76.811975][T10185] do_exit+0x92f/0x2e50 [ 76.816204][T10185] ? __sanitizer_cov_trace_cmp1+0x11/0x20 [ 76.821907][T10185] ? mm_update_next_owner+0x640/0x640 [ 76.827267][T10185] ? fd_install+0x4d/0x60 [ 76.831596][T10185] ? __sys_socket+0x180/0x220 [ 76.836343][T10185] ? move_addr_to_kernel+0x80/0x80 [ 76.842130][T10185] ? __ia32_sys_fallocate+0xf0/0xf0 [ 76.847313][T10185] do_group_exit+0x135/0x360 [ 76.851885][T10185] __x64_sys_exit_group+0x44/0x50 [ 76.856887][T10185] do_syscall_64+0xfa/0x760 [ 76.861399][T10185] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.867271][T10185] RIP: 0033:0x43ed68 [ 76.871152][T10185] Code: Bad RIP value. [ 76.875197][T10185] RSP: 002b:00007fff8823dcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 76.883585][T10185] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 76.891541][T10185] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 76.899496][T10185] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 76.907446][T10185] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 76.915403][T10185] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 76.923367][T10185] ================================================================== [ 76.932180][T10185] Kernel panic - not syncing: panic_on_warn set ... [ 76.938878][T10185] CPU: 0 PID: 10185 Comm: syz-executor498 Tainted: G B 5.3.0-rc3-next-20190809 #63 [ 76.949432][T10185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.959464][T10185] Call Trace: [ 76.962864][T10185] dump_stack+0x172/0x1f0 [ 76.967179][T10185] panic+0x2dc/0x755 [ 76.971048][T10185] ? add_taint.cold+0x16/0x16 [ 76.975711][T10185] ? rxrpc_unuse_local+0x23/0x70 [ 76.980621][T10185] ? preempt_schedule+0x4b/0x60 [ 76.985458][T10185] ? ___preempt_schedule+0x16/0x20 [ 76.990753][T10185] ? trace_hardirqs_on+0x5e/0x240 [ 76.995757][T10185] ? rxrpc_unuse_local+0x23/0x70 [ 77.000670][T10185] end_report+0x47/0x4f [ 77.004801][T10185] ? rxrpc_unuse_local+0x23/0x70 [ 77.009713][T10185] __kasan_report.cold+0xe/0x36 [ 77.014542][T10185] ? _raw_read_unlock_irqrestore+0xd1/0xe0 [ 77.020324][T10185] ? rxrpc_unuse_local+0x23/0x70 [ 77.025238][T10185] kasan_report+0x12/0x17 [ 77.029545][T10185] check_memory_region+0x134/0x1a0 [ 77.034630][T10185] __kasan_check_write+0x14/0x20 [ 77.039573][T10185] rxrpc_unuse_local+0x23/0x70 [ 77.044320][T10185] rxrpc_release+0x47d/0x840 [ 77.048888][T10185] __sock_release+0xce/0x280 [ 77.053453][T10185] sock_close+0x1e/0x30 [ 77.057584][T10185] __fput+0x2ff/0x890 [ 77.061542][T10185] ? __sock_release+0x280/0x280 [ 77.066373][T10185] ____fput+0x16/0x20 [ 77.070332][T10185] task_work_run+0x145/0x1c0 [ 77.074900][T10185] do_exit+0x92f/0x2e50 [ 77.079036][T10185] ? __sanitizer_cov_trace_cmp1+0x11/0x20 [ 77.084732][T10185] ? mm_update_next_owner+0x640/0x640 [ 77.090081][T10185] ? fd_install+0x4d/0x60 [ 77.094386][T10185] ? __sys_socket+0x180/0x220 [ 77.099037][T10185] ? move_addr_to_kernel+0x80/0x80 [ 77.104130][T10185] ? __ia32_sys_fallocate+0xf0/0xf0 [ 77.109305][T10185] do_group_exit+0x135/0x360 [ 77.113870][T10185] __x64_sys_exit_group+0x44/0x50 [ 77.118871][T10185] do_syscall_64+0xfa/0x760 [ 77.123352][T10185] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.129217][T10185] RIP: 0033:0x43ed68 [ 77.133094][T10185] Code: Bad RIP value. [ 77.137149][T10185] RSP: 002b:00007fff8823dcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 77.145548][T10185] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 77.153503][T10185] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 77.161448][T10185] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 77.169392][T10185] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 77.177337][T10185] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 77.186326][T10185] Kernel Offset: disabled [ 77.190643][T10185] Rebooting in 86400 seconds..