Message ID | 1526551233-11438-1-git-send-email-thuth@redhat.com |
---|---|
State | Superseded |
Headers | show |
Series | libc: Check for NULL pointers in free() | expand |
diff --git a/lib/libc/stdlib/free.c b/lib/libc/stdlib/free.c index 9005450..d276585 100644 --- a/lib/libc/stdlib/free.c +++ b/lib/libc/stdlib/free.c @@ -19,8 +19,10 @@ free(void *ptr) { struct chunk *header; + if (!ptr) + return; + header = (struct chunk *) ptr; header--; header->inuse = 0; - }
POSIX says that the free() function should simply do nothing if a NULL pointer argument has been specified. So let's be a little bit more compliant in our libc and add a NULL pointer check here, too. Signed-off-by: Thomas Huth <thuth@redhat.com> --- lib/libc/stdlib/free.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)