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-rw-r--r--src/H5Olink.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/src/H5Olink.c b/src/H5Olink.c
index 10479e6..30bac65 100644
--- a/src/H5Olink.c
+++ b/src/H5Olink.c
@@ -119,11 +119,12 @@ H5FL_DEFINE_STATIC(H5O_link_t);
static void *
H5O__link_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
- size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
+ size_t p_size, const uint8_t *p)
{
H5O_link_t *lnk = NULL; /* Pointer to link message */
size_t len = 0; /* Length of a string in the message */
unsigned char link_flags; /* Flags for encoding link info */
+ const uint8_t *p_end = p + p_size; /* End of the p buffer */
void *ret_value = NULL; /* Return value */
FUNC_ENTER_STATIC
@@ -199,6 +200,11 @@ H5O__link_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
if(len == 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "invalid name length")
+ /* Make sure that length doesn't exceed buffer size, which could occur
+ when the file is corrupted */
+ if(p + len > p_end)
+ HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "name length causes read past end of buffer")
+
/* Get the link's name */
if(NULL == (lnk->name = (char *)H5MM_malloc(len + 1)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
@@ -218,6 +224,12 @@ H5O__link_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
UINT16DECODE(p, len)
if(len == 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "invalid link length")
+
+ /* Make sure that length doesn't exceed buffer size, which could occur
+ when the file is corrupted */
+ if(p + len > p_end)
+ HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "name length causes read past end of buffer")
+
if(NULL == (lnk->u.soft.name = (char *)H5MM_malloc((size_t)len + 1)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
H5MM_memcpy(lnk->u.soft.name, p, len);
@@ -238,6 +250,11 @@ H5O__link_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
lnk->u.ud.size = len;
if(len > 0)
{
+ /* Make sure that length doesn't exceed buffer size, which could
+ occur when the file is corrupted */
+ if(p + len > p_end)
+ HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "name length causes read past end of buffer")
+
if(NULL == (lnk->u.ud.udata = H5MM_malloc((size_t)len)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
H5MM_memcpy(lnk->u.ud.udata, p, len);