On Wed, Oct 31, 2018 at 12:58:38AM +0300, Vasily Averin wrote:
> iloc.bh was taken in ext4_reserve_inode_write() and released
> in ext4_mark_iloc_dirty(). It should not be released 2nd time
> in rollback after failed ext4_handle_dirty_metadata(gdb_bh)
>
> Fixes b40971426a83 ("ext4: add error checking to calls to ...") # 2.6.38
>
> Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
I fixed this in a simpler way:
>From 6a91a2eb1c5af1381caebfb4c1c91dc175351f6f Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@xxxxxxx>
Date: Tue, 6 Nov 2018 17:18:17 -0500
Subject: [PATCH] ext4: avoid possible double brelse() in add_new_gdb() on
error path
Fixes: b40971426a83 ("ext4: add error checking to calls to ...")
Reported-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 2.6.38
---
fs/ext4/resize.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 85158e9de7c2..a5efee34415f 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -871,6 +871,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
err = ext4_handle_dirty_metadata(handle, NULL, gdb_bh);
if (unlikely(err)) {
ext4_std_error(sb, err);
+ iloc.bh = NULL;
goto exit_inode;
}
brelse(dind);
--
2.18.0.rc0
