CVS commit: src/sys/kern

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

Module Name:    src
Committed By:   kamil
Date:           Tue May 29 23:34:18 UTC 2018

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

Log Message:
Harden PT_ATTACH in ptrace(2)

Don't allow to PT_ATTACH from a vfork(2)ed child (before exec(3)/_exit(3))
to its parent. Return error with EPERM errno.

This scenario does not have a purpose and there is no clear picture how to
route signals.

Sponsored by <The NetBSD Foundation>


To generate a diff of this commit:
cvs rdiff -u -r1.42 -r1.43 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.