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Subject[RFC][PATCH 11/27] IMA: don't propagate opened through the entire thing
Date
From: Al Viro <viro@zeniv.linux.org.uk>

just check ->f_mode in ima_appraise_measurement()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/namei.c | 3 +--
fs/nfsd/vfs.c | 2 +-
include/linux/ima.h | 4 ++--
security/integrity/ima/ima.h | 4 ++--
security/integrity/ima/ima_appraise.c | 4 ++--
security/integrity/ima/ima_main.c | 16 ++++++++--------
6 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 955a28a62f78..5e3eefca676a 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3400,8 +3400,7 @@ static int do_last(struct nameidata *nd,
if (error)
goto out;
opened:
- error = ima_file_check(file, op->acc_mode,
- file->f_mode & FMODE_CREATED ? FILE_CREATED : 0);
+ error = ima_file_check(file, op->acc_mode);
if (!error && will_truncate)
error = handle_truncate(file);
out:
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index b0555d7d8200..55a099e47ba2 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -763,7 +763,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
goto out_nfserr;
}

- host_err = ima_file_check(file, may_flags, 0);
+ host_err = ima_file_check(file, may_flags);
if (host_err) {
fput(file);
goto out_nfserr;
diff --git a/include/linux/ima.h b/include/linux/ima.h
index 0e4647e0eb60..d9ba3fc363b7 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -16,7 +16,7 @@ struct linux_binprm;

#ifdef CONFIG_IMA
extern int ima_bprm_check(struct linux_binprm *bprm);
-extern int ima_file_check(struct file *file, int mask, int opened);
+extern int ima_file_check(struct file *file, int mask);
extern void ima_file_free(struct file *file);
extern int ima_file_mmap(struct file *file, unsigned long prot);
extern int ima_read_file(struct file *file, enum kernel_read_file_id id);
@@ -34,7 +34,7 @@ static inline int ima_bprm_check(struct linux_binprm *bprm)
return 0;
}

-static inline int ima_file_check(struct file *file, int mask, int opened)
+static inline int ima_file_check(struct file *file, int mask)
{
return 0;
}
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index 354bb5716ce3..e4c1a236976c 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -238,7 +238,7 @@ int ima_appraise_measurement(enum ima_hooks func,
struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
- int xattr_len, int opened);
+ int xattr_len);
int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func);
void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file);
enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
@@ -254,7 +254,7 @@ static inline int ima_appraise_measurement(enum ima_hooks func,
struct file *file,
const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
- int xattr_len, int opened)
+ int xattr_len)
{
return INTEGRITY_UNKNOWN;
}
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 8bd7a0733e51..deec1804a00a 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -212,7 +212,7 @@ int ima_appraise_measurement(enum ima_hooks func,
struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename,
struct evm_ima_xattr_data *xattr_value,
- int xattr_len, int opened)
+ int xattr_len)
{
static const char op[] = "appraise_data";
const char *cause = "unknown";
@@ -231,7 +231,7 @@ int ima_appraise_measurement(enum ima_hooks func,
cause = iint->flags & IMA_DIGSIG_REQUIRED ?
"IMA-signature-required" : "missing-hash";
status = INTEGRITY_NOLABEL;
- if (opened & FILE_CREATED)
+ if (file->f_mode & FMODE_CREATED)
iint->flags |= IMA_NEW_FILE;
if ((iint->flags & IMA_NEW_FILE) &&
(!(iint->flags & IMA_DIGSIG_REQUIRED) ||
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index dca44cf7838e..b286f37712d5 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -168,7 +168,7 @@ void ima_file_free(struct file *file)

static int process_measurement(struct file *file, const struct cred *cred,
u32 secid, char *buf, loff_t size, int mask,
- enum ima_hooks func, int opened)
+ enum ima_hooks func)
{
struct inode *inode = file_inode(file);
struct integrity_iint_cache *iint = NULL;
@@ -294,7 +294,7 @@ static int process_measurement(struct file *file, const struct cred *cred,
if (rc == 0 && (action & IMA_APPRAISE_SUBMASK)) {
inode_lock(inode);
rc = ima_appraise_measurement(func, iint, file, pathname,
- xattr_value, xattr_len, opened);
+ xattr_value, xattr_len);
inode_unlock(inode);
}
if (action & IMA_AUDIT)
@@ -338,7 +338,7 @@ int ima_file_mmap(struct file *file, unsigned long prot)
if (file && (prot & PROT_EXEC)) {
security_task_getsecid(current, &secid);
return process_measurement(file, current_cred(), secid, NULL,
- 0, MAY_EXEC, MMAP_CHECK, 0);
+ 0, MAY_EXEC, MMAP_CHECK);
}

return 0;
@@ -364,13 +364,13 @@ int ima_bprm_check(struct linux_binprm *bprm)

security_task_getsecid(current, &secid);
ret = process_measurement(bprm->file, current_cred(), secid, NULL, 0,
- MAY_EXEC, BPRM_CHECK, 0);
+ MAY_EXEC, BPRM_CHECK);
if (ret)
return ret;

security_cred_getsecid(bprm->cred, &secid);
return process_measurement(bprm->file, bprm->cred, secid, NULL, 0,
- MAY_EXEC, CREDS_CHECK, 0);
+ MAY_EXEC, CREDS_CHECK);
}

/**
@@ -383,14 +383,14 @@ int ima_bprm_check(struct linux_binprm *bprm)
* On success return 0. On integrity appraisal error, assuming the file
* is in policy and IMA-appraisal is in enforcing mode, return -EACCES.
*/
-int ima_file_check(struct file *file, int mask, int opened)
+int ima_file_check(struct file *file, int mask)
{
u32 secid;

security_task_getsecid(current, &secid);
return process_measurement(file, current_cred(), secid, NULL, 0,
mask & (MAY_READ | MAY_WRITE | MAY_EXEC |
- MAY_APPEND), FILE_CHECK, opened);
+ MAY_APPEND), FILE_CHECK);
}
EXPORT_SYMBOL_GPL(ima_file_check);

@@ -493,7 +493,7 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size,
func = read_idmap[read_id] ?: FILE_CHECK;
security_task_getsecid(current, &secid);
return process_measurement(file, current_cred(), secid, buf, size,
- MAY_READ, func, 0);
+ MAY_READ, func);
}

static int __init init_ima(void)
--
2.11.0
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