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| author | Tyler Hicks <tyhicks@linux.microsoft.com> | 2020-07-09 01:19:07 -0500 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2020-07-20 13:28:13 -0400 |
| commit | 39e5993d0d452b9ef612f2fcf7ca77ff319438f4 (patch) | |
| tree | 3f2b9a3d2436a1118ef52b387ca497f4d4bdc2bf /security | |
| parent | 5f3e92657bbfb63ad3109433d843c89996114b03 (diff) | |
| download | lwn-39e5993d0d452b9ef612f2fcf7ca77ff319438f4.tar.gz lwn-39e5993d0d452b9ef612f2fcf7ca77ff319438f4.zip | |
ima: Shallow copy the args_p member of ima_rule_entry.lsm elements
The args_p member is a simple string that is allocated by
ima_rule_init(). Shallow copy it like other non-LSM references in
ima_rule_entry structs.
There are no longer any necessary error path cleanups to do in
ima_lsm_copy_rule().
Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/integrity/ima/ima_policy.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index cf3ddb38dfa8..86ccd0076e71 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -300,10 +300,13 @@ static struct ima_rule_entry *ima_lsm_copy_rule(struct ima_rule_entry *entry) continue; nentry->lsm[i].type = entry->lsm[i].type; - nentry->lsm[i].args_p = kstrdup(entry->lsm[i].args_p, - GFP_KERNEL); - if (!nentry->lsm[i].args_p) - goto out_err; + nentry->lsm[i].args_p = entry->lsm[i].args_p; + /* + * Remove the reference from entry so that the associated + * memory will not be freed during a later call to + * ima_lsm_free_rule(entry). + */ + entry->lsm[i].args_p = NULL; security_filter_rule_init(nentry->lsm[i].type, Audit_equal, @@ -311,14 +314,9 @@ static struct ima_rule_entry *ima_lsm_copy_rule(struct ima_rule_entry *entry) &nentry->lsm[i].rule); if (!nentry->lsm[i].rule) pr_warn("rule for LSM \'%s\' is undefined\n", - (char *)entry->lsm[i].args_p); + (char *)nentry->lsm[i].args_p); } return nentry; - -out_err: - ima_lsm_free_rule(nentry); - kfree(nentry); - return NULL; } static int ima_lsm_update_rule(struct ima_rule_entry *entry) |