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sanitize audit_fd_pair()
* no allocations * return void Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
564f6993ff
commit
157cf649a7
4 changed files with 20 additions and 49 deletions
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@ -1016,10 +1016,7 @@ int do_pipe_flags(int *fd, int flags)
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goto err_fdr;
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fdw = error;
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error = audit_fd_pair(fdr, fdw);
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if (error < 0)
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goto err_fdw;
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audit_fd_pair(fdr, fdw);
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fd_install(fdr, fr);
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fd_install(fdw, fw);
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fd[0] = fdr;
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@ -1027,8 +1024,6 @@ int do_pipe_flags(int *fd, int flags)
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return 0;
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err_fdw:
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put_unused_fd(fdw);
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err_fdr:
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put_unused_fd(fdr);
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err_read_pipe:
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@ -448,7 +448,7 @@ extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mod
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extern int audit_bprm(struct linux_binprm *bprm);
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extern void audit_socketcall(int nargs, unsigned long *args);
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extern int audit_sockaddr(int len, void *addr);
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extern int __audit_fd_pair(int fd1, int fd2);
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extern void __audit_fd_pair(int fd1, int fd2);
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extern int audit_set_macxattr(const char *name);
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extern void __audit_mq_open(int oflag, mode_t mode, struct mq_attr *attr);
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extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
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@ -464,11 +464,10 @@ static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
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if (unlikely(!audit_dummy_context()))
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__audit_ipc_obj(ipcp);
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}
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static inline int audit_fd_pair(int fd1, int fd2)
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static inline void audit_fd_pair(int fd1, int fd2)
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{
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if (unlikely(!audit_dummy_context()))
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return __audit_fd_pair(fd1, fd2);
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return 0;
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__audit_fd_pair(fd1, fd2);
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}
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static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode)
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{
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@ -537,7 +536,7 @@ extern int audit_signals;
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#define audit_ipc_set_perm(q,u,g,m) ((void)0)
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#define audit_bprm(p) ({ 0; })
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#define audit_socketcall(n,a) ((void)0)
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#define audit_fd_pair(n,a) ({ 0; })
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#define audit_fd_pair(n,a) ((void)0)
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#define audit_sockaddr(len, addr) ({ 0; })
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#define audit_set_macxattr(n) do { ; } while (0)
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#define audit_mq_open(o,m,a) ((void)0)
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@ -131,11 +131,6 @@ struct audit_aux_data_execve {
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struct mm_struct *mm;
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};
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struct audit_aux_data_fd_pair {
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struct audit_aux_data d;
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int fd[2];
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};
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struct audit_aux_data_pids {
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struct audit_aux_data d;
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pid_t target_pid[AUDIT_AUX_PIDS];
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@ -241,6 +236,7 @@ struct audit_context {
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struct mq_attr attr;
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} mq_open;
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};
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int fds[2];
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#if AUDIT_DEBUG
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int put_count;
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@ -1382,11 +1378,6 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
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audit_log_execve_info(context, &ab, axi);
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break; }
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case AUDIT_FD_PAIR: {
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struct audit_aux_data_fd_pair *axs = (void *)aux;
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audit_log_format(ab, "fd0=%d fd1=%d", axs->fd[0], axs->fd[1]);
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break; }
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case AUDIT_BPRM_FCAPS: {
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struct audit_aux_data_bprm_fcaps *axs = (void *)aux;
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audit_log_format(ab, "fver=%x", axs->fcap_ver);
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@ -1416,6 +1407,15 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
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if (context->type)
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show_special(context, &call_panic);
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if (context->fds[0] >= 0) {
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ab = audit_log_start(context, GFP_KERNEL, AUDIT_FD_PAIR);
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if (ab) {
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audit_log_format(ab, "fd0=%d fd1=%d",
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context->fds[0], context->fds[1]);
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audit_log_end(ab);
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}
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}
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if (context->sockaddr_len) {
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ab = audit_log_start(context, GFP_KERNEL, AUDIT_SOCKADDR);
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if (ab) {
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@ -1696,6 +1696,7 @@ void audit_syscall_exit(int valid, long return_code)
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context->target_sid = 0;
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context->sockaddr_len = 0;
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context->type = 0;
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context->fds[0] = -1;
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kfree(context->filterkey);
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context->filterkey = NULL;
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tsk->audit_context = context;
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@ -2291,29 +2292,12 @@ void audit_socketcall(int nargs, unsigned long *args)
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* @fd1: the first file descriptor
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* @fd2: the second file descriptor
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*
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* Returns 0 for success or NULL context or < 0 on error.
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*/
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int __audit_fd_pair(int fd1, int fd2)
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void __audit_fd_pair(int fd1, int fd2)
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{
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struct audit_context *context = current->audit_context;
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struct audit_aux_data_fd_pair *ax;
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if (likely(!context)) {
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return 0;
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}
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ax = kmalloc(sizeof(*ax), GFP_KERNEL);
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if (!ax) {
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return -ENOMEM;
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}
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ax->fd[0] = fd1;
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ax->fd[1] = fd2;
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ax->d.type = AUDIT_FD_PAIR;
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ax->d.next = context->aux;
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context->aux = (void *)ax;
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return 0;
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context->fds[0] = fd1;
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context->fds[1] = fd2;
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}
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/**
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@ -1313,13 +1313,7 @@ asmlinkage long sys_socketpair(int family, int type, int protocol,
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goto out_fd1;
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}
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err = audit_fd_pair(fd1, fd2);
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if (err < 0) {
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fput(newfile1);
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fput(newfile2);
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goto out_fd;
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}
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audit_fd_pair(fd1, fd2);
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fd_install(fd1, newfile1);
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fd_install(fd2, newfile2);
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/* fd1 and fd2 may be already another descriptors.
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@ -1349,7 +1343,6 @@ out_fd2:
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out_fd1:
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put_filp(newfile2);
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sock_release(sock2);
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out_fd:
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put_unused_fd(fd1);
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put_unused_fd(fd2);
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goto out;
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