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buffer: Only allow to allocate a maximum of 256MB

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Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Andreas Schneider
2018-09-02 14:00:58 +02:00
parent d2131b286f
commit 254a0f7132
1 changed files with 7 additions and 0 deletions
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7
src/buffer.c
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@@ -52,6 +52,9 @@ struct ssh_buffer_struct {
uint8_t *data; uint8_t *data;
}; };
/* Buffer size maximum is 256M */
#define BUFFER_SIZE_MAX 0x10000000
/** /**
* @defgroup libssh_buffer The SSH buffer functions. * @defgroup libssh_buffer The SSH buffer functions.
* @ingroup libssh * @ingroup libssh
@@ -191,6 +194,10 @@ static int realloc_buffer(struct ssh_buffer_struct *buffer, size_t needed)
} }
needed = smallest; needed = smallest;
if (needed > BUFFER_SIZE_MAX) {
return -1;
}
if (buffer->secure) { if (buffer->secure) {
new = malloc(needed); new = malloc(needed);
if (new == NULL) { if (new == NULL) {