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authorJeff Mahoney <jeffm@suse.com>2017-06-22 16:35:04 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-01-31 12:06:11 +0100
commit512e3b18531eb9526a1e695c19043f78e3a0abb1 (patch)
tree5a7782a1df7a8fae4d13f9ca492ecf850aafe102 /fs
parentac125d89f8e980f100f63634a81b84fed7e997cf (diff)
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.c2
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)