The patch titled
uml: improved error handling while locating temp dir
has been added to the -mm tree. Its filename is
uml-improved-error-handling-while-locating-temp-dir.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: uml: improved error handling while locating temp dir
From: Jim Meyering <meyering@xxxxxxxxxx>
* arch/um/os-Linux/mem.c (make_tempfile): Don't deref NULL upon failed malloc.
* arch/um/os-Linux/mem.c (make_tempfile): Handle NULL tempdir.
Don't let a long tempdir (e.g., via TMPDIR) provoke heap corruption.
[ jdike - formatting cleanups, deleted obsolete comment ]
Signed-off-by: Jim Meyering <meyering@xxxxxxxxxx>
Signed-off-by: Jeff Dike <jdike@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/um/os-Linux/mem.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff -puN arch/um/os-Linux/mem.c~uml-improved-error-handling-while-locating-temp-dir arch/um/os-Linux/mem.c
--- a/arch/um/os-Linux/mem.c~uml-improved-error-handling-while-locating-temp-dir
+++ a/arch/um/os-Linux/mem.c
@@ -162,11 +162,6 @@ found:
goto out;
}
-/*
- * This proc still used in tt-mode
- * (file: kernel/tt/ptproxy/proxy.c, proc: start_debugger).
- * So it isn't 'static' yet.
- */
static int __init make_tempfile(const char *template, char **out_tempname,
int do_unlink)
{
@@ -175,10 +170,13 @@ static int __init make_tempfile(const ch
which_tmpdir();
tempname = malloc(MAXPATHLEN);
- if (!tempname)
- goto out;
+ if (tempname == NULL)
+ return -1;
find_tempdir();
+ if ((tempdir == NULL) || (strlen(tempdir) >= MAXPATHLEN))
+ return -1;
+
if (template[0] != '/')
strcpy(tempname, tempdir);
else
@@ -196,9 +194,8 @@ static int __init make_tempfile(const ch
}
if (out_tempname) {
*out_tempname = tempname;
- } else {
+ } else
free(tempname);
- }
return fd;
out:
free(tempname);
_
Patches currently in -mm which might be from meyering@xxxxxxxxxx are
uml-improved-error-handling-while-locating-temp-dir.patch
-
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