diff options
Diffstat (limited to 'src/H5Ofill.c')
| -rw-r--r-- | src/H5Ofill.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/src/H5Ofill.c b/src/H5Ofill.c index 695673f..5068039 100644 --- a/src/H5Ofill.c +++ b/src/H5Ofill.c @@ -196,8 +196,9 @@ H5O__fill_new_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, size_t p_size, const uint8_t *p) { - H5O_fill_t *fill = NULL; - void * ret_value = NULL; /* Return value */ + H5O_fill_t * fill = NULL; + const uint8_t *p_end = p + p_size - 1; /* End of the p buffer */ + void * ret_value = NULL; /* Return value */ FUNC_ENTER_STATIC @@ -228,8 +229,11 @@ H5O__fill_new_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh, INT32DECODE(p, fill->size); if (fill->size > 0) { H5_CHECK_OVERFLOW(fill->size, ssize_t, size_t); - if ((size_t)fill->size > p_size) - HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "destination buffer too small") + + /* Ensure that fill size doesn't exceed buffer size, due to possible data corruption */ + if (p + fill->size - 1 > p_end) + HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "fill size exceeds buffer size") + if (NULL == (fill->buf = H5MM_malloc((size_t)fill->size))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value") H5MM_memcpy(fill->buf, p, (size_t)fill->size); @@ -311,10 +315,11 @@ static void * H5O__fill_old_decode(H5F_t *f, H5O_t *open_oh, unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, size_t p_size, const uint8_t *p) { - H5O_fill_t *fill = NULL; /* Decoded fill value message */ - htri_t exists = FALSE; - H5T_t * dt = NULL; - void * ret_value = NULL; /* Return value */ + H5O_fill_t * fill = NULL; /* Decoded fill value message */ + htri_t exists = FALSE; + H5T_t * dt = NULL; + const uint8_t *p_end = p + p_size - 1; /* End of the p buffer */ + void * ret_value = NULL; /* Return value */ FUNC_ENTER_STATIC @@ -335,8 +340,10 @@ H5O__fill_old_decode(H5F_t *f, H5O_t *open_oh, unsigned H5_ATTR_UNUSED mesg_flag /* Only decode the fill value itself if there is one */ if (fill->size > 0) { H5_CHECK_OVERFLOW(fill->size, ssize_t, size_t); - if ((size_t)fill->size > p_size) - HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "destination buffer too small") + + /* Ensure that fill size doesn't exceed buffer size, due to possible data corruption */ + if (p + fill->size - 1 > p_end) + HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "fill size exceeds buffer size") /* Get the datatype message */ if ((exists = H5O_msg_exists_oh(open_oh, H5O_DTYPE_ID)) < 0) |