Allow audit rules to compare the gid of the running task to the gid of the inode in question.
Signed-off-by: Eric Paris <[email protected]> --- include/linux/audit.h | 3 ++- kernel/auditsc.c | 6 ++++++ 2 files changed, 8 insertions(+), 1 deletions(-) diff --git a/include/linux/audit.h b/include/linux/audit.h index 04295cb..9734b1e 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -184,8 +184,9 @@ /* AUDIT_FIELD_COMPARE rule list */ #define AUDIT_COMPARE_UID_TO_OBJ_UID 1 +#define AUDIT_COMPARE_GID_TO_OBJ_GID 2 -#define AUDIT_MAX_FIELD_COMPARE AUDIT_COMPARE_UID_TO_OBJ_UID +#define AUDIT_MAX_FIELD_COMPARE AUDIT_COMPARE_GID_TO_OBJ_GID /* Rule fields */ /* These are useful when checking the * task structure at task creation time diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 848a84b..d0b388c 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -474,6 +474,8 @@ static int audit_compare_id(const struct cred *cred, unsigned long addr; uid_t cred_uid, name_uid; + BUILD_BUG_ON(sizeof(uid_t) != sizeof(gid_t)); + addr = (unsigned long)cred; addr += cred_offset; @@ -511,6 +513,10 @@ static int audit_field_compare(struct task_struct *tsk, return audit_compare_id(cred, offsetof(struct cred, uid), name, offsetof(struct audit_names, uid), f, ctx); + case AUDIT_COMPARE_GID_TO_OBJ_GID: + return audit_compare_id(cred, offsetof(struct cred, gid), + name, offsetof(struct audit_names, gid), + f, ctx); default: return 0; } -- Linux-audit mailing list [email protected] https://www.redhat.com/mailman/listinfo/linux-audit
