On 1/24/2022 11:11 PM, GONG, Ruiqi wrote:
LSM blob has been involved for superblock's security struct. So fix the
remaining direct access to sb->s_security by using the LSM blob
mechanism.
Fixes: 08abe46b2cfc ("selinux: fall back to SECURITY_FS_USE_GENFS if no xattr support")
Fixes: 69c4a42d72eb ("lsm,selinux: add new hook to compare new mount to an existing mount")
Signed-off-by: GONG, Ruiqi <gongruiqi1@xxxxxxxxxx>
Reviewed-by: Casey Schaufler <casey@xxxxxxxxxxxxxxxx>
This is pretty important.
---
security/selinux/hooks.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 5b6895e4fc29..a0243bae8423 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -479,7 +479,7 @@ static int selinux_is_sblabel_mnt(struct super_block *sb)
static int sb_check_xattr_support(struct super_block *sb)
{
- struct superblock_security_struct *sbsec = sb->s_security;
+ struct superblock_security_struct *sbsec = selinux_superblock(sb);
struct dentry *root = sb->s_root;
struct inode *root_inode = d_backing_inode(root);
u32 sid;
@@ -2647,7 +2647,7 @@ static int selinux_sb_eat_lsm_opts(char *options, void **mnt_opts)
static int selinux_sb_mnt_opts_compat(struct super_block *sb, void *mnt_opts)
{
struct selinux_mnt_opts *opts = mnt_opts;
- struct superblock_security_struct *sbsec = sb->s_security;
+ struct superblock_security_struct *sbsec = selinux_superblock(sb);
u32 sid;
int rc;
