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| author | Jeff Mahoney <jeffm@suse.com> | 2017-06-22 16:35:04 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-31 14:46:14 +0100 |
| commit | 1f31381a6cc0e0e5fb06371268388c00f8d04df4 (patch) | |
| tree | bc9e00ec22535d8987b839500d5f1ae551017e3b /fs | |
| parent | 9ff49848ab5f2402478dd384d19966a82b9b1f09 (diff) | |
| download | linux-stable-1f31381a6cc0e0e5fb06371268388c00f8d04df4.tar.gz linux-stable-1f31381a6cc0e0e5fb06371268388c00f8d04df4.tar.bz2 linux-stable-1f31381a6cc0e0e5fb06371268388c00f8d04df4.zip | |
reiserfs: don't preallocate blocks for extended attributes
commit 54930dfeb46e978b447af0fb8ab4e181c1bf9d7a upstream.
Most extended attributes will fit in a single block. More importantly,
we drop the reference to the inode while holding the transaction open
so the preallocated blocks aren't released. As a result, the inode
may be evicted before it's removed from the transaction's prealloc list
which can cause memory corruption.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/reiserfs/bitmap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c index 73705d4bb069..edc8ef78b63f 100644 --- a/fs/reiserfs/bitmap.c +++ b/fs/reiserfs/bitmap.c @@ -1136,7 +1136,7 @@ static int determine_prealloc_size(reiserfs_blocknr_hint_t * hint) hint->prealloc_size = 0; if (!hint->formatted_node && hint->preallocate) { - if (S_ISREG(hint->inode->i_mode) + if (S_ISREG(hint->inode->i_mode) && !IS_PRIVATE(hint->inode) && hint->inode->i_size >= REISERFS_SB(hint->th->t_super)->s_alloc_options. preallocmin * hint->inode->i_sb->s_blocksize) |