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udf: Release preallocation on last writeable close

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Commit 6fb1ca92a6 "udf: Fix race between write(2) and close(2)"
changed the condition when preallocation is released. The idea was that
we don't want to release the preallocation for an inode on close when
there are other writeable file descriptors for the inode. However the
condition was written in the opposite way so we released preallocation
only if there were other writeable file descriptors. Fix the problem by
changing the condition properly.

CC: stable@vger.kernel.org
Fixes: 6fb1ca92a6
Reported-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2015-01-28 08:38:20 +01:00
parent 188c901941
commit b07ef35244
1 changed files with 1 additions and 1 deletions
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fs/udf/file.c
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@ -224,7 +224,7 @@ long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
static int udf_release_file(struct inode *inode, struct file *filp)
{
if (filp->f_mode & FMODE_WRITE &&
atomic_read(&inode->i_writecount) > 1) {
atomic_read(&inode->i_writecount) == 1) {
/*
* Grab i_mutex to avoid races with writes changing i_size
* while we are running.