From 52f3c81a9d41af019ab8f05051c5251f078b12e5 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Mon, 11 Feb 2008 15:32:29 -0800 Subject: [PATCH] apply: do not barf on patch with too large an offset Previously a patch that records too large a line number caused the offset matching code in git-apply to overstep its internal buffer. Noticed by Johannes Schindelin. Signed-off-by: Junio C Hamano --- builtin-apply.c | 3 +++ t/t4105-apply-fuzz.sh | 57 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 60 insertions(+) create mode 100755 t/t4105-apply-fuzz.sh diff --git a/builtin-apply.c b/builtin-apply.c index 2b8ba81d8..5ed4e918c 100644 --- a/builtin-apply.c +++ b/builtin-apply.c @@ -1809,6 +1809,9 @@ static int find_pos(struct image *img, else if (match_end) line = img->nr - preimage->nr; + if (line > img->nr) + line = img->nr; + try = 0; for (i = 0; i < line; i++) try += img->line[i].len; diff --git a/t/t4105-apply-fuzz.sh b/t/t4105-apply-fuzz.sh new file mode 100755 index 000000000..0e8d25f18 --- /dev/null +++ b/t/t4105-apply-fuzz.sh @@ -0,0 +1,57 @@ +#!/bin/sh + +test_description='apply with fuzz and offset' + +. ./test-lib.sh + +dotest () { + name="$1" && shift && + test_expect_success "$name" " + git checkout-index -f -q -u file && + git apply $* && + diff -u expect file + " +} + +test_expect_success setup ' + + for i in 1 2 3 4 5 6 7 8 9 10 11 12 + do + echo $i + done >file && + git update-index --add file && + for i in 1 2 3 4 5 6 7 a b c d e 8 9 10 11 12 + do + echo $i + done >file && + cat file >expect && + git diff >O0.diff && + + sed -e "s/@@ -5,6 +5,11 @@/@@ -2,6 +2,11 @@/" >O1.diff O0.diff && + sed -e "s/@@ -5,6 +5,11 @@/@@ -7,6 +7,11 @@/" >O2.diff O0.diff && + sed -e "s/@@ -5,6 +5,11 @@/@@ -19,6 +19,11 @@/" >O3.diff O0.diff && + + sed -e "s/^ 5/ S/" >F0.diff O0.diff && + sed -e "s/^ 5/ S/" >F1.diff O1.diff && + sed -e "s/^ 5/ S/" >F2.diff O2.diff && + sed -e "s/^ 5/ S/" >F3.diff O3.diff + +' + +dotest 'unmodified patch' O0.diff + +dotest 'minus offset' O1.diff + +dotest 'plus offset' O2.diff + +dotest 'big offset' O3.diff + +dotest 'fuzz with no offset' -C2 F0.diff + +dotest 'fuzz with minus offset' -C2 F1.diff + +dotest 'fuzz with plus offset' -C2 F2.diff + +dotest 'fuzz with big offset' -C2 F3.diff + +test_done -- 2.30.2