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authorSeung-Woo Kim <sw0312.kim@samsung.com>2016-12-12 11:35:26 +0300
committerCasey Schaufler <casey@schaufler-ca.com>2017-01-10 20:47:20 +0300
commit83a1e53f392075e291a90746241dce45c6f9429a (patch)
tree40cb07887ad83b39bb253199e448de0946d760fd /security/smack
parent805b65a80bed029572c6462cc4be0a260e1482e9 (diff)
downloadlinux-83a1e53f392075e291a90746241dce45c6f9429a.tar.xz
Smack: ignore private inode for file functions
The access to fd from anon_inode is always failed because there is no set xattr operations. So this patch fixes to ignore private inode including anon_inode for file functions. It was only ignored for smack_file_receive() to share dma-buf fd, but dma-buf has other functions like ioctl and mmap. Reference: https://lkml.org/lkml/2015/4/17/16 Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Diffstat (limited to 'security/smack')
-rw-r--r--security/smack/smack_lsm.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 225c4ad56444..679455350faf 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1647,6 +1647,9 @@ static int smack_file_ioctl(struct file *file, unsigned int cmd,
struct smk_audit_info ad;
struct inode *inode = file_inode(file);
+ if (unlikely(IS_PRIVATE(inode)))
+ return 0;
+
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
@@ -1676,6 +1679,9 @@ static int smack_file_lock(struct file *file, unsigned int cmd)
int rc;
struct inode *inode = file_inode(file);
+ if (unlikely(IS_PRIVATE(inode)))
+ return 0;
+
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
smk_ad_setfield_u_fs_path(&ad, file->f_path);
rc = smk_curacc(smk_of_inode(inode), MAY_LOCK, &ad);
@@ -1702,6 +1708,9 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
int rc = 0;
struct inode *inode = file_inode(file);
+ if (unlikely(IS_PRIVATE(inode)))
+ return 0;
+
switch (cmd) {
case F_GETLK:
break;
@@ -1755,6 +1764,9 @@ static int smack_mmap_file(struct file *file,
if (file == NULL)
return 0;
+ if (unlikely(IS_PRIVATE(file_inode(file))))
+ return 0;
+
isp = file_inode(file)->i_security;
if (isp->smk_mmap == NULL)
return 0;