commit: eaeee242c531cd4b0a4a46e8b5dd7ef504380c42 From: Artem Bityutskiy <[email protected]> Date: Fri, 6 May 2011 17:08:56 +0300 Subject: [PATCH] UBIFS: fix a rare memory leak in ro to rw remounting path
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 <[email protected]> Cc: [email protected] --- fs/ubifs/sb.c | 3 ++- fs/ubifs/super.c | 1 + 2 files changed, 3 insertions(+), 1 deletions(-) diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c index bf31b47..cad60b5 100644 --- a/fs/ubifs/sb.c +++ b/fs/ubifs/sb.c @@ -475,7 +475,8 @@ failed: * @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) { diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 407c064..575ea83 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -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; } _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
