Author: kib
Date: Sun Mar 6 22:59:30 2011
New Revision: 219352
URL: http://svn.freebsd.org/changeset/base/219352
Log:
The execution of the shebang script requires putting interpreter path,
possible option and script path in the place of argv[0] supplied to
execve(2). It is possible and valid for the substitution to be shorter
then the argv[0].
Avoid signed underflow in this case.
Submitted by: Devon H. O'Dell <devon.odell gmail com>
PR: kern/155321
MFC after: 1 week
Modified:
head/sys/kern/imgact_shell.c
Modified: head/sys/kern/imgact_shell.c
==============================================================================
--- head/sys/kern/imgact_shell.c Sun Mar 6 22:56:14 2011
(r219351)
+++ head/sys/kern/imgact_shell.c Sun Mar 6 22:59:30 2011
(r219352)
@@ -195,7 +195,7 @@ exec_shell_imgact(imgp)
length = (imgp->args->argc == 0) ? 0 :
strlen(imgp->args->begin_argv) + 1; /* bytes to delete */
- if (offset - length > imgp->args->stringspace) {
+ if (offset > imgp->args->stringspace + length) {
if (sname != NULL)
sbuf_delete(sname);
return (E2BIG);
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
