diff options
| author | Joe Perches <joe@perches.com> | 2013-03-20 15:07:45 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-03-21 16:34:04 +1100 |
| commit | 5fc7f49b5d1d7aabcd25596b18f115f76c45676b (patch) | |
| tree | c4dafe7ce2b272612318e8876776b253c578d3ce /scripts | |
| parent | 98dc5e345be094bd9ac347a5fa9e4b2142e7a4f3 (diff) | |
checkpatch: add check for reuse of krealloc arg
On Thu, 2013-03-14 at 13:30 +0000, David Woodhouse wrote:
> If krealloc() returns NULL, it *doesn't* free the original. So any code
> of the form 'foo = krealloc(foo, …);' is almost certainly a bug.
So add a check for it to checkpatch.
Signed-off-by: Joe Perches <joe@perches.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/checkpatch.pl | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index b28cc384a5bc..7ef2b4bd0145 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3476,6 +3476,13 @@ sub process { "unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr); } +# check for krealloc arg reuse + if ($^V && $^V ge 5.10.0 && + $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*krealloc\s*\(\s*\1\s*,/) { + WARN("KREALLOC_ARG_REUSE", + "Reusing the krealloc arg is almost always a bug\n" . $herecurr); + } + # check for alloc argument mismatch if ($line =~ /\b(kcalloc|kmalloc_array)\s*\(\s*sizeof\b/) { WARN("ALLOC_ARRAY_ARGS", |