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| author | Chris Malley <mail@chrismalley.co.uk> | 2007-09-26 14:19:18 +1000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-09-26 09:22:04 -0700 |
| commit | f6a592e8abd2f2394623ce5427cbb4c265495974 (patch) | |
| tree | ff5e176b3ee0832978babae80bb13f32c8a77699 /Documentation/lguest | |
| parent | 78bd8fbbcd66fc977baa40e7fd838a4461b0f727 (diff) | |
| download | linux-f6a592e8abd2f2394623ce5427cbb4c265495974.tar.gz linux-f6a592e8abd2f2394623ce5427cbb4c265495974.tar.bz2 linux-f6a592e8abd2f2394623ce5427cbb4c265495974.zip | |
lguest example launcher truncates block device file to 0 length on problems
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@chrismalley.co.uk>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/lguest')
| -rw-r--r-- | Documentation/lguest/lguest.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c index f7918401a007..73c5f1f3d5d2 100644 --- a/Documentation/lguest/lguest.c +++ b/Documentation/lguest/lguest.c @@ -882,7 +882,7 @@ static u32 handle_block_output(int fd, const struct iovec *iov, * 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); } |