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fastrpc: hexagonrpcd: listener: do not attempt to allocate zero outbufs

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The malloc(3p) manual page states that an implementation may choose to
return a non-NULL pointer when the size is zero. This function assumes
that there is an element in the array if the pointer is not NULL. When
the size is zero, skip the allocation and return NULL.
This commit is contained in:
Richard Acayan
2023-12-04 19:35:19 -05:00
parent 23585daf67
commit 9ea9bed77b
1 changed files with 8 additions and 0 deletions
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8
fastrpc/hexagonrpcd/listener.c
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@@ -73,6 +73,14 @@ static struct fastrpc_io_buffer *allocate_outbufs(const struct fastrpc_function_
off_t off;
uint32_t *sizes;
/*
* POSIX allows malloc to return a non-NULL pointer to a zero-size area
* in memory. Since the code below assumes non-zero size if the pointer
* is non-NULL, exit early if we do not need to allocate anything.
*/
if (out_count == 0)
return NULL;
out_count = def->out_bufs + (def->out_nums && 1);
out = malloc(sizeof(struct fastrpc_io_buffer) * out_count);
if (out == NULL)