CVS commit: src/sys/kern

["Kamil Rytarowski" <kamil%netbsd.org@localhost>]

Module Name:    src
Committed By:   kamil
Date:           Wed May  3 15:53:31 UTC 2017

Modified Files:
        src/sys/kern: sys_ptrace_common.c

Log Message:
Fix kernel panic triggered with LLDB

PT_SETSTEP and PT_CLEARSTEP in the current design must unlock proc_lock and
t->p_lock. These functions use lwp_delref() for a tracee with more than one
LWP. This function internally lock (t->)p_lock and this is lock against
self.

There are coming new ATF test with PT_*STEP with multiple LWPs to catch
these bugs in future changes.

Sponsored by <The NetBSD Foundation>


To generate a diff of this commit:
cvs rdiff -u -r1.21 -r1.22 src/sys/kern/sys_ptrace_common.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.