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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] [PATCH] qemu-img: Fix segfault during rebase |
Date: | Fri, 19 Feb 2010 16:01:33 -0600 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091209 Fedora/3.0-4.fc12 Lightning/1.0pre Thunderbird/3.0 |
On 02/17/2010 05:32 AM, Kevin Wolf wrote:
This fixes a possible read beyond the end of the temporary buffers used for comparing data in the old and the new backing file. Signed-off-by: Kevin Wolf<address@hidden>
Applied. Thanks. Regards, Anthony Liguori
--- qemu-img.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index 250d892..258dc62 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1225,7 +1225,7 @@ static int img_rebase(int argc, char **argv) int pnum; if (compare_sectors(buf_old + written * 512, - buf_new + written * 512, n,&pnum)) + buf_new + written * 512, n - written,&pnum)) { ret = bdrv_write(bs, sector + written, buf_old + written * 512, pnum);
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