The patch titled
lguest example launcher truncates block device file to 0 length on problems
has been added to the -mm tree. Its filename is
lguest-example-launcher-truncates-block-device-file-to-0.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: lguest example launcher truncates block device file to 0 length on problems
From: Chris Malley <mail@xxxxxxxxxxxxxxxxx>
The function should also use ftruncate64() rather than ftruncate() to
prevent files over 4GB (not uncommon for a root filesystem) being zeroed.
Signed-off-by: Chris Malley <mail@xxxxxxxxxxxxxxxxx>
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/lguest/lguest.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN Documentation/lguest/lguest.c~lguest-example-launcher-truncates-block-device-file-to-0 Documentation/lguest/lguest.c
--- a/Documentation/lguest/lguest.c~lguest-example-launcher-truncates-block-device-file-to-0
+++ a/Documentation/lguest/lguest.c
@@ -882,7 +882,7 @@ static u32 handle_block_output(int fd, c
* of the block file (possibly extending it). */
if (off + len > device_len) {
/* Trim it back to the correct length */
- ftruncate(dev->fd, device_len);
+ ftruncate64(dev->fd, device_len);
/* Die, bad Guest, die. */
errx(1, "Write past end %llu+%u", off, len);
}
_
Patches currently in -mm which might be from mail@xxxxxxxxxxxxxxxxx are
lguest-example-launcher-truncates-block-device-file-to-0.patch
-
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