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notmuch: Fix off-by-one errors if a header is >200 characters long.

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If a single header is more than 200 characters long a set of 'off by
one' errors cause memory corruption.

When allocating memory with:
     a = malloc (len);
the last usable byte of the memory is 'a + len - 1' rather than 'a +
len'.

Fix the same bug when calculating the current offset should the buffer
used for collecting the output header need to be reallocated.
This commit is contained in:
David Edmondson 2010-04-28 11:45:41 +01:00 committed by Carl Worth
parent 1d528f890a
commit 1671eaecdb
1 changed files with 3 additions and 3 deletions
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6
gmime-filter-headers.c
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@ -169,7 +169,7 @@ filter_filter (GMimeFilter *filter, char *inbuf, size_t inlen, size_t prespace,
headers->lineptr = headers->line = malloc (headers->line_size);
}
lineptr = headers->lineptr;
lineend = headers->line + headers->line_size;
lineend = headers->line + headers->line_size - 1;
if (lineptr == NULL)
return;
outptr = filter->outbuf;
@ -185,8 +185,8 @@ filter_filter (GMimeFilter *filter, char *inbuf, size_t inlen, size_t prespace,
if (lineptr == lineend) {
headers->line_size *= 2;
headers->line = xrealloc (headers->line, headers->line_size);
lineptr = headers->line + headers->line_size / 2;
lineend = headers->line + headers->line_size;
lineptr = headers->line + (headers->line_size / 2) - 1;
lineend = headers->line + headers->line_size - 1;
}
if (headers->saw_nl && *inptr != ' ' && *inptr != '\t') {