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lib_iconv.c:Fix possible out-of-bounds reads

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Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
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chenrun1 2023-09-14 15:46:28 +08:00 committed by Xiang Xiao
parent c9bc6b1ad5
commit 4ce205cf08
1 changed files with 14 additions and 0 deletions
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14
libs/libc/locale/lib_iconv.c
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@ -420,6 +420,20 @@ size_t iconv(iconv_t cd, FAR char **in, FAR size_t *inb,
to = extract_to(cd);
from = extract_from(cd);
if (to > sizeof(g_charmaps) - 1)
{
/* Avoid going outside the range of the array */
to = sizeof(g_charmaps) - 1;
}
if (from > sizeof(g_charmaps) - 1)
{
/* Avoid going outside the range of the array */
from = sizeof(g_charmaps) - 1;
}
map = g_charmaps + from + 1;
tomap = g_charmaps + to + 1;
type = map[0 - 1];