diff options
Diffstat (limited to 'src/H5Olayout.c')
| -rw-r--r-- | src/H5Olayout.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/src/H5Olayout.c b/src/H5Olayout.c index 4020b23..651e317 100644 --- a/src/H5Olayout.c +++ b/src/H5Olayout.c @@ -17,7 +17,7 @@ * Purpose: Messages related to data layout. */ -#define H5D_FRIEND /*suppress error about including H5Dpkg */ +#define H5D_FRIEND /*suppress error about including H5Dpkg */ #include "H5Omodule.h" /* This source code file is part of the H5O module */ #include "H5private.h" /* Generic Functions */ @@ -90,12 +90,13 @@ H5FL_DEFINE(H5O_layout_t); */ static void * H5O__layout_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) + unsigned H5_ATTR_UNUSED *ioflags, size_t p_size, const uint8_t *p) { - H5O_layout_t *mesg = NULL; - uint8_t * heap_block = NULL; - unsigned u; - void * ret_value = NULL; /* Return value */ + H5O_layout_t * mesg = NULL; + uint8_t * heap_block = NULL; + unsigned u; + const uint8_t *p_end = p + p_size - 1; /* End of the p buffer */ + void * ret_value = NULL; /* Return value */ FUNC_ENTER_STATIC @@ -179,6 +180,10 @@ H5O__layout_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNU if (mesg->type == H5D_COMPACT) { UINT32DECODE(p, mesg->storage.u.compact.size); if (mesg->storage.u.compact.size > 0) { + /* Ensure that size doesn't exceed buffer size, due to possible data corruption */ + if (p + mesg->storage.u.compact.size - 1 > p_end) + HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "storage size exceeds buffer size") + if (NULL == (mesg->storage.u.compact.buf = H5MM_malloc(mesg->storage.u.compact.size))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for compact data buffer") @@ -198,6 +203,10 @@ H5O__layout_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNU UINT16DECODE(p, mesg->storage.u.compact.size); if (mesg->storage.u.compact.size > 0) { + /* Ensure that size doesn't exceed buffer size, due to possible data corruption */ + if (p + mesg->storage.u.compact.size - 1 > p_end) + HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, NULL, "storage size exceeds buffer size") + /* Allocate space for compact data */ if (NULL == (mesg->storage.u.compact.buf = H5MM_malloc(mesg->storage.u.compact.size))) HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, NULL, @@ -887,13 +896,13 @@ done: } /* end H5O__layout_reset() */ /*------------------------------------------------------------------------- - * Function: H5O__layout_free + * Function: H5O__layout_free * - * Purpose: Free's the message + * Purpose: Free's the message * - * Return: Non-negative on success/Negative on failure + * Return: Non-negative on success/Negative on failure * - * Programmer: Quincey Koziol + * Programmer: Quincey Koziol * Saturday, March 11, 2000 * *------------------------------------------------------------------------- |