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authorJan Kara <jack@suse.cz>2013-04-09 09:21:41 -0400
committerTheodore Ts'o <tytso@mit.edu>2013-04-09 09:21:41 -0400
commitbcb1385096caf421363d47e735acda940cb1e12b (patch)
tree64f43332e262c078b74aedb1d062aec293176b6f /fs/ext4/super.c
parente8238f9a8339b3578c85e4192a7a23bc2bdc0333 (diff)
ext4: fix deadlock with quota feature
We didn't mark hidden quota files with S_NOQUOTA flag and thus quota was accounted even for quota files. Thus we could recurse back to quota code when adding new blocks to quota file which can easily deadlock. Mark hidden quota files properly. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r--fs/ext4/super.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 525beb6e3e1..968ca936917 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4953,6 +4953,8 @@ static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
return PTR_ERR(qf_inode);
}
+ /* Don't account quota for quota files to avoid recursion */
+ qf_inode->i_flags |= S_NOQUOTA;
err = dquot_enable(qf_inode, type, format_id, flags);
iput(qf_inode);