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format_cap: Detect vector allocation failures.

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A crash was seen on a system that ran out of memory due to Asterisk not
checking for vector allocation failures in format_cap.c. With this
change, if either of the AST_VECTOR_INIT calls fail, we will return a
value indicating failure.

Change-Id: Ieb9c59f39dfde6d11797a92b45e0cf8ac5722bc8
This commit is contained in:
Mark Michelson
2015-10-22 17:07:55 -05:00
parent 41f9fd56fb
commit 5dd9e1938a
1 changed files with 20 additions and 4 deletions
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24
main/format_cap.c
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@@ -93,14 +93,27 @@ static void format_cap_destroy(void *obj)
AST_VECTOR_FREE(&cap->preference_order);
}
static inline void format_cap_init(struct ast_format_cap *cap, enum ast_format_cap_flags flags)
/*
* \brief Initialize values on an ast_format_cap
*
* \param cap ast_format_cap to initialize
* \param flags Unused.
* \retval 0 Success
* \retval -1 Failure
*/
static inline int format_cap_init(struct ast_format_cap *cap, enum ast_format_cap_flags flags)
{
AST_VECTOR_INIT(&cap->formats, 0);
if (AST_VECTOR_INIT(&cap->formats, 0)) {
return -1;
}
/* TODO: Look at common usage of this and determine a good starting point */
AST_VECTOR_INIT(&cap->preference_order, 5);
if (AST_VECTOR_INIT(&cap->preference_order, 5)) {
return -1;
}
cap->framing = UINT_MAX;
return 0;
}
struct ast_format_cap *__ast_format_cap_alloc(enum ast_format_cap_flags flags,
@@ -114,7 +127,10 @@ struct ast_format_cap *__ast_format_cap_alloc(enum ast_format_cap_flags flags,
return NULL;
}
format_cap_init(cap, flags);
if (format_cap_init(cap, flags)) {
ao2_ref(cap, -1);
return NULL;
}
return cap;
}