From 42838bb265b9cff3de9587fcacc398b5112dc2d9 Mon Sep 17 00:00:00 2001 From: Jesper Juhl Date: Thu, 6 Jan 2011 21:45:21 +0000 Subject: btrfs: Mem leak in btrfs_get_acl() It seems to me that we leak the memory allocated to 'value' in btrfs_get_acl() if the call to posix_acl_from_xattr() fails. Here's a patch that attempts to correct that problem. Signed-off-by: Jesper Juhl Signed-off-by: Chris Mason --- fs/btrfs/acl.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'fs/btrfs/acl.c') diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c index 2222d161c7b6..6d1410e392d3 100644 --- a/fs/btrfs/acl.c +++ b/fs/btrfs/acl.c @@ -60,8 +60,10 @@ static struct posix_acl *btrfs_get_acl(struct inode *inode, int type) size = __btrfs_getxattr(inode, name, value, size); if (size > 0) { acl = posix_acl_from_xattr(value, size); - if (IS_ERR(acl)) + if (IS_ERR(acl)) { + kfree(value); return acl; + } set_cached_acl(inode, type, acl); } kfree(value); -- cgit v1.2.3 From d0f69686c2ae775529aadc7a8acc6f13ad41de66 Mon Sep 17 00:00:00 2001 From: Miao Xie Date: Tue, 25 Jan 2011 15:46:17 +0800 Subject: Btrfs: Don't return acl info when mounting with noacl option Steps to reproduce: # mkfs.btrfs /dev/sda2 # mount /dev/sda2 /mnt # touch /mnt/file0 # setfacl -m 'u:root:x,g::x,o::x' /mnt/file0 # umount /mnt # mount /dev/sda2 -o noacl /mnt # getfacl /mnt/file0 ... user::rw- user:root:--x group::--x mask::--x other::--x The output should be: user::rw- group::--x other::--x Signed-off-by: Miao Xie Signed-off-by: Li Zefan --- fs/btrfs/acl.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'fs/btrfs/acl.c') diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c index 2222d161c7b6..3c52fc8afe29 100644 --- a/fs/btrfs/acl.c +++ b/fs/btrfs/acl.c @@ -37,6 +37,9 @@ static struct posix_acl *btrfs_get_acl(struct inode *inode, int type) char *value = NULL; struct posix_acl *acl; + if (!IS_POSIXACL(inode)) + return NULL; + acl = get_cached_acl(inode, type); if (acl != ACL_NOT_CACHED) return acl; @@ -82,6 +85,9 @@ static int btrfs_xattr_acl_get(struct dentry *dentry, const char *name, struct posix_acl *acl; int ret = 0; + if (!IS_POSIXACL(dentry->d_inode)) + return -EOPNOTSUPP; + acl = btrfs_get_acl(dentry->d_inode, type); if (IS_ERR(acl)) -- cgit v1.2.3