From: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
According to man open.2, files opened with O_PATH are not really opened. The
obtained file descriptor is used to indicate a location in the filesystem
tree and to perform operations that act purely at the file descriptor
level.
Thus, ignore open() syscalls with O_PATH, since IMA cares about file data.
Cc: stable@xxxxxxxxxxxxxxx # v2.6.39.x
Fixes: 1abf0c718f15a ("New kind of open files - "location only".")
Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
---
security/integrity/ima/ima_main.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 50b37420ea2c..712c3a522e6c 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -202,7 +202,8 @@ static void ima_file_free(struct file *file)
struct inode *inode = file_inode(file);
struct ima_iint_cache *iint;
- if (!ima_policy_flag || !S_ISREG(inode->i_mode))
+ if (!ima_policy_flag || !S_ISREG(inode->i_mode) ||
+ (file->f_flags & O_PATH))
return;
iint = ima_iint_find(inode);
@@ -232,7 +233,8 @@ static int process_measurement(struct file *file, const struct cred *cred,
enum hash_algo hash_algo;
unsigned int allowed_algos = 0;
- if (!ima_policy_flag || !S_ISREG(inode->i_mode))
+ if (!ima_policy_flag || !S_ISREG(inode->i_mode) ||
+ (file->f_flags & O_PATH))
return 0;
/* Return an IMA_MEASURE, IMA_APPRAISE, IMA_AUDIT action
--
2.47.0.118.gfd3785337b
