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authorCasey Schaufler <casey@schaufler-ca.com>2018-06-01 10:45:12 -0700
committerCasey Schaufler <casey@schaufler-ca.com>2018-06-05 12:16:01 -0700
commit0f8983cf97d3327531b7843c831517cac3a1b9ed (patch)
tree04978f906764ad6794bf824545ff6b35542f443c /security/smack/smack_lsm.c
parentb3859ee18ed287170b66b19a78191f7312ec3470 (diff)
downloadlinux-0f8983cf97d3327531b7843c831517cac3a1b9ed.tar.gz
Smack: Fix memory leak in smack_inode_getsecctx
Fix memory leak in smack_inode_getsecctx The implementation of smack_inode_getsecctx() made incorrect assumptions about how Smack presents a security context. Smack does not need to allocate memory to support security contexts, so "releasing" a Smack context is a no-op. The code made an unnecessary copy and returned that as a context, which was never freed. The revised implementation returns the context correctly. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Reported-by: CHANDAN VN <chandan.vn@samsung.com> Tested-by: CHANDAN VN <chandan.vn@samsung.com>
Diffstat (limited to 'security/smack/smack_lsm.c')
-rw-r--r--security/smack/smack_lsm.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 0b414836bebd..5e3beae334a8 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1545,9 +1545,9 @@ static int smack_inode_listsecurity(struct inode *inode, char *buffer,
*/
static void smack_inode_getsecid(struct inode *inode, u32 *secid)
{
- struct inode_smack *isp = inode->i_security;
+ struct smack_known *skp = smk_of_inode(inode);
- *secid = isp->smk_inode->smk_secid;
+ *secid = skp->smk_secid;
}
/*
@@ -4538,12 +4538,10 @@ static int smack_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
static int smack_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
{
- int len = 0;
- len = smack_inode_getsecurity(inode, XATTR_SMACK_SUFFIX, ctx, true);
+ struct smack_known *skp = smk_of_inode(inode);
- if (len < 0)
- return len;
- *ctxlen = len;
+ *ctx = skp->smk_known;
+ *ctxlen = strlen(skp->smk_known);
return 0;
}