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refs/files: fix NULL pointer deref when releasing ref store
The `free_ref_cache()` function is not `NULL` safe and will thus segfault when being passed such a pointer. This can easily happen when trying to release a partially initialized "files" ref store. Fix this. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -71,6 +71,8 @@ static void free_ref_entry(struct ref_entry *entry)
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void free_ref_cache(struct ref_cache *cache)
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{
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if (!cache)
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return;
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free_ref_entry(cache->root);
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free(cache);
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}
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