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Fix vuln OSV-2024-390 #4

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Fix vuln OSV-2024-390 #4

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4 changes: 4 additions & 0 deletions src/H5Ocache.c
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Original file line number Diff line number Diff line change
Expand Up @@ -781,6 +781,10 @@ H5O__cache_chk_serialize(const H5F_t *f, void *image, size_t len, void *_thing)
/* copy the chunk into the image -- this is potentially expensive.
* Can we rework things so that the chunk and the cache share a buffer?
*/
/* Ensure len does not exceed the size of the source buffer */
if (len > chk_proxy->oh->chunk[chk_proxy->chunkno].size)
HGOTO_ERROR(H5E_OHDR, H5E_OVERFLOW, FAIL, "buffer overflow detected");

H5MM_memcpy(image, chk_proxy->oh->chunk[chk_proxy->chunkno].image, len);

done:
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