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UBIFS: fix a rare memory leak in ro to rw remounting path

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When re-mounting from R/O mode to R/W mode and the LEB count in the superblock
is not up-to date, because for the underlying UBI volume became larger, we
re-write the superblock. We allocate RAM for these purposes, but never free it.
So this is a memory leak, although very rare one.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Cc: stable@kernel.org
This commit is contained in:
Artem Bityutskiy 2011-05-06 17:08:56 +03:00
parent c1f1f91d21
commit eaeee242c5
2 changed files with 3 additions and 1 deletions
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3
fs/ubifs/sb.c
View File

@ -475,7 +475,8 @@ static int validate_sb(struct ubifs_info *c, struct ubifs_sb_node *sup)
* @c: UBIFS file-system description object
*
* This function returns a pointer to the superblock node or a negative error
* code.
* code. Note, the user of this function is responsible of kfree()'ing the
* returned superblock buffer.
*/
struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c)
{

1
fs/ubifs/super.c
View File

@ -1585,6 +1585,7 @@ static int ubifs_remount_rw(struct ubifs_info *c)
}
sup->leb_cnt = cpu_to_le32(c->leb_cnt);
err = ubifs_write_sb_node(c, sup);
kfree(sup);
if (err)
goto out;
}