diff options
| -rw-r--r-- | include/linux/audit.h | 16 | ||||
| -rw-r--r-- | kernel/auditsc.c | 9 | ||||
| -rw-r--r-- | net/socket.c | 6 |
3 files changed, 21 insertions, 10 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h index 37464c5..8f92e1d 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -84,6 +84,9 @@ extern int audit_classify_arch(int arch); #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */ #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */ +/* maximized args number that audit_socketcall can process */ +#define AUDITSC_ARGS 6 + struct filename; #ifdef CONFIG_AUDITSYSCALL @@ -190,7 +193,7 @@ extern void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp); extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode); extern int __audit_bprm(struct linux_binprm *bprm); -extern void __audit_socketcall(int nargs, unsigned long *args); +extern int __audit_socketcall(int nargs, unsigned long *args); extern int __audit_sockaddr(int len, void *addr); extern void __audit_fd_pair(int fd1, int fd2); extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr); @@ -224,10 +227,11 @@ static inline int audit_bprm(struct linux_binprm *bprm) return __audit_bprm(bprm); return 0; } -static inline void audit_socketcall(int nargs, unsigned long *args) +static inline int audit_socketcall(int nargs, unsigned long *args) { if (unlikely(!audit_dummy_context())) - __audit_socketcall(nargs, args); + return __audit_socketcall(nargs, args); + return 0; } static inline int audit_sockaddr(int len, void *addr) { @@ -354,8 +358,10 @@ static inline int audit_bprm(struct linux_binprm *bprm) { return 0; } -static inline void audit_socketcall(int nargs, unsigned long *args) -{ } +static inline int audit_socketcall(int nargs, unsigned long *args) +{ + return 0; +} static inline void audit_fd_pair(int fd1, int fd2) { } static inline int audit_sockaddr(int len, void *addr) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index b59ffb2..d57ad32 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -226,7 +226,7 @@ struct audit_context { union { struct { int nargs; - long args[6]; + long args[AUDITSC_ARGS]; } socketcall; struct { kuid_t uid; @@ -2491,17 +2491,20 @@ int __audit_bprm(struct linux_binprm *bprm) /** * audit_socketcall - record audit data for sys_socketcall - * @nargs: number of args + * @nargs: number of args, which should not be more than AUDITSC_ARGS. * @args: args array * */ -void __audit_socketcall(int nargs, unsigned long *args) +int __audit_socketcall(int nargs, unsigned long *args) { struct audit_context *context = current->audit_context; + if (nargs <= 0 || nargs > AUDITSC_ARGS || !args) + return -EINVAL; context->type = AUDIT_SOCKETCALL; context->socketcall.nargs = nargs; memcpy(context->socketcall.args, args, nargs * sizeof(unsigned long)); + return 0; } /** diff --git a/net/socket.c b/net/socket.c index 2ca51c7..1bbc37b 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2436,7 +2436,7 @@ static const unsigned char nargs[21] = { SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) { - unsigned long a[6]; + unsigned long a[AUDITSC_ARGS]; unsigned long a0, a1; int err; unsigned int len; @@ -2452,7 +2452,9 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) if (copy_from_user(a, args, len)) return -EFAULT; - audit_socketcall(nargs[call] / sizeof(unsigned long), a); + err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); + if (err) + return err; a0 = a[0]; a1 = a[1]; |
