A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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lguest example launcher truncates block device file to 0 length on problems

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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 <[email protected]>
Signed-off-by: Rusty Russell <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Chris Malley 2007-09-26 14:19:18 +10:00 • committed by Linus Torvalds
commit f6a592e8ab
1 changed files with 1 additions and 1 deletions
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2
Documentation/lguest/lguest.c
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@ -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);
}