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authorJan Kara <jack@suse.cz>2013-12-03 11:20:06 +0100
committerJan Kara <jack@suse.cz>2013-12-04 12:26:51 +0100
commitdf4e7ac0bb70abc97fbfd9ef09671fc084b3f9db (patch)
tree6ef8a1afad4806126e1e8533d27be4b4340db982 /fs
parentdea4f48a0a301b23c65af8e4fe8ccf360c272fbf (diff)
ext2: Fix oops in ext2_get_block() called from ext2_quota_write()
ext2_quota_write() doesn't properly setup bh it passes to ext2_get_block() and thus we hit assertion BUG_ON(maxblocks == 0) in ext2_get_blocks() (or we could actually ask for mapping arbitrary number of blocks depending on whatever value was on stack). Fix ext2_quota_write() to properly fill in number of blocks to map. CC: stable@vger.kernel.org # >= 2.6.12 Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Christoph Hellwig <hch@lst.de> Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext2/super.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 288534920fe5..20d6697bd638 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1493,6 +1493,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
sb->s_blocksize - offset : towrite;
tmp_bh.b_state = 0;
+ tmp_bh.b_size = sb->s_blocksize;
err = ext2_get_block(inode, blk, &tmp_bh, 1);
if (err < 0)
goto out;

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