Added six new audit message types, AUDIT_NS_SET_* and function audit_log_ns_set() to log a switch of namespace.
Signed-off-by: Richard Guy Briggs <[email protected]> --- include/linux/audit.h | 4 +++ include/uapi/linux/audit.h | 6 +++++ kernel/audit.c | 46 ++++++++++++++++++++++++++++++++++++++++++++ kernel/nsproxy.c | 3 ++ 4 files changed, 59 insertions(+), 0 deletions(-) diff --git a/include/linux/audit.h b/include/linux/audit.h index 1474334..9de9b25 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -26,6 +26,7 @@ #include <linux/sched.h> #include <linux/ptrace.h> #include <uapi/linux/audit.h> +#include <linux/proc_ns.h> struct audit_sig_info { uid_t uid; @@ -484,6 +485,7 @@ static inline void audit_log_ns_info(struct task_struct *tsk) extern int audit_log_ns_init(int type, long long old_snum, long long snum); extern int audit_log_ns_del(int type, long long snum); +extern void audit_log_ns_set(const struct proc_ns_operations *ops, void *ns); extern int audit_update_lsm_rules(void); @@ -547,6 +549,8 @@ static inline int audit_log_ns_init(int type, long long old_snum, { } static inline int audit_log_ns_del(int type, long long snum) { } +static inline void audit_log_ns_set(const struct proc_ns_operations *ops, void *ns) +{ } #define audit_enabled 0 #endif /* CONFIG_AUDIT */ static inline void audit_log_string(struct audit_buffer *ab, const char *buf) diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index 1acfea7..7ec7209 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -123,6 +123,12 @@ #define AUDIT_NS_DEL_USER 1339 /* Record USER namespace instance deletion */ #define AUDIT_NS_DEL_PID 1340 /* Record PID namespace instance deletion */ #define AUDIT_NS_DEL_NET 1341 /* Record NET namespace instance deletion */ +#define AUDIT_NS_SET_MNT 1342 /* Record mount namespace instance deletion */ +#define AUDIT_NS_SET_UTS 1343 /* Record UTS namespace instance deletion */ +#define AUDIT_NS_SET_IPC 1344 /* Record IPC namespace instance deletion */ +#define AUDIT_NS_SET_USER 1345 /* Record USER namespace instance deletion */ +#define AUDIT_NS_SET_PID 1346 /* Record PID namespace instance deletion */ +#define AUDIT_NS_SET_NET 1347 /* Record NET namespace instance deletion */ #define AUDIT_AVC 1400 /* SE Linux avc denial or grant */ #define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */ diff --git a/kernel/audit.c b/kernel/audit.c index cc63445..84590d1 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -2021,6 +2021,52 @@ int audit_log_ns_del(int type, long long snum) audit_log_end(ab); return 0; } + +/** + * audit_log_ns_set - report a namespace set change + * @ops: the ops structure for the namespace to be changed + * @ns: the new namespace + */ +void audit_log_ns_set(const struct proc_ns_operations *ops, void *ns) +{ + struct audit_buffer *ab; + void *old_ns; + int msg_type; + + switch (ops->type) { + case CLONE_NEWNS: + msg_type = AUDIT_NS_SET_MNT; + break; + case CLONE_NEWUTS: + msg_type = AUDIT_NS_SET_UTS; + break; + case CLONE_NEWIPC: + msg_type = AUDIT_NS_SET_IPC; + break; + case CLONE_NEWUSER: + msg_type = AUDIT_NS_SET_USER; + break; + case CLONE_NEWPID: + msg_type = AUDIT_NS_SET_PID; + break; + case CLONE_NEWNET: + msg_type = AUDIT_NS_SET_NET; + break; + default: + return; + } + //ab = audit_log_start(tsk->audit_context, GFP_KERNEL, msg_type); + //audit_log_format(ab, " pid=%d", current->pid); + audit_log_common_recv_msg(&ab, ops->type); + if (!ab) + return; + old_ns = ops->get(current); + audit_log_format(ab, " old-%ssn=%llx %ssn=%llx", + ops->name, ops->snum(old_ns), + ops->name, ops->snum(ns)); + ops->put(old_ns); + audit_log_end(ab); +} #endif /* CONFIG_NAMESPACES */ /** diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index 2cdc16b..e37409a 100644 --- a/kernel/nsproxy.c +++ b/kernel/nsproxy.c @@ -275,6 +275,9 @@ SYSCALL_DEFINE2(setns, int, fd, int, nstype) goto out; } switch_task_namespaces(tsk, new_nsproxy); + + audit_log_ns_set(ops, ei->ns); + out: fput(file); return err; -- 1.7.1 -- Linux-audit mailing list [email protected] https://www.redhat.com/mailman/listinfo/linux-audit
