[incubator-nuttx] 01/02: libc/locale: check if mmap failed before proceeding.

[ac...@apache.org]

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acassis pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git

commit f38783f4b586922f1cbca95e4348b7dad5a79037
Author: Xu Xingliang <xu...@xiaomi.com>
AuthorDate: Thu Dec 16 11:10:33 2021 +0800

    libc/locale: check if mmap failed before proceeding.
    
    Signed-off-by: Xu Xingliang <xu...@xiaomi.com>
---
 libs/libc/locale/lib_gettext.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libs/libc/locale/lib_gettext.c b/libs/libc/locale/lib_gettext.c
index cb16c2e..2882ba1 100644
--- a/libs/libc/locale/lib_gettext.c
+++ b/libs/libc/locale/lib_gettext.c
@@ -119,7 +119,8 @@ static FAR void *momap(FAR const char *path, FAR size_t *size)
     {
       *size = st.st_size;
       map = mmap(NULL, *size, PROT_READ, MAP_SHARED, fd, 0);
-      if (map[0] != MO_MAGIC && map[0] != __swap_uint32(MO_MAGIC))
+      if (map != MAP_FAILED &&
+          map[0] != MO_MAGIC && map[0] != __swap_uint32(MO_MAGIC))
         {
           munmap(map, *size);
           map = MAP_FAILED;