[PATCH 07/11] vcs-svn: Check declared number of output bytes
flat view
STALE3772d
From: Jonathan Nieder <hidden>
Date: 2016-06-15 22:49:46
Subsystem:
the rest · Maintainer:
Linus Torvalds
Check that the declared output size for each window is correct, and reserve that amount of space in the output buffer in advance. Signed-off-by: Jonathan Nieder <redacted> --- vcs-svn/svndiff.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/vcs-svn/svndiff.c b/vcs-svn/svndiff.c
index ac776e0..c03cd7e 100644
--- a/vcs-svn/svndiff.c
+++ b/vcs-svn/svndiff.c@@ -220,10 +220,15 @@ static int apply_one_window(struct line_buffer *delta, off_t *delta_len, rv = error("Cannot read delta: %s", strerror(errno)); goto done; } + strbuf_grow(&ctx.out, out_len); if (apply_window_in_core(&ctx) || write_strbuf(&ctx.out, out)) { rv = -1; goto done; } + if (ctx.out.len != out_len) { + rv = error("Invalid delta: incorrect postimage length"); + goto done; + } done: strbuf_release(&ctx.data); strbuf_release(&ctx.instructions);
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1.7.2.3