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rbuffer: Use xcalloc to ensure memory is initialized

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Since the rbuffer contents are used by string functions (like sscan,
strlen, etc.), it is not safe to use uninitialized memory.  Using
xcalloc ensures the string-based functions do not run past the end of
the buffer.

Closes #5676
This commit is contained in:
James McCoy 2016-11-28 19:30:38 -05:00
parent 39bb43c530
commit 80b808dbfe
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GPG Key ID: DFE691AE331BA3DB
1 changed files with 2 additions and 2 deletions
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4
src/nvim/rbuffer.c
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@ -18,7 +18,7 @@ RBuffer *rbuffer_new(size_t capacity)
capacity = 0x10000;
}
RBuffer *rv = xmalloc(sizeof(RBuffer) + capacity);
RBuffer *rv = xcalloc(1, sizeof(RBuffer) + capacity);
rv->full_cb = rv->nonfull_cb = NULL;
rv->data = NULL;
rv->size = 0;
@ -78,7 +78,7 @@ void rbuffer_reset(RBuffer *buf) FUNC_ATTR_NONNULL_ALL
size_t temp_size;
if ((temp_size = rbuffer_size(buf))) {
if (buf->temp == NULL) {
buf->temp = xmalloc(rbuffer_capacity(buf));
buf->temp = xcalloc(1, rbuffer_capacity(buf));
}
rbuffer_read(buf, buf->temp, buf->size);
}