diff options
Diffstat (limited to 'components')
| -rw-r--r-- | components/lwp/lwp_syscall.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/components/lwp/lwp_syscall.c b/components/lwp/lwp_syscall.c index de147d5f09..f3538c2cb4 100644 --- a/components/lwp/lwp_syscall.c +++ b/components/lwp/lwp_syscall.c @@ -970,6 +970,7 @@ sysret_t sys_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptf #ifdef ARCH_MM_MMU int ret = -1; fd_set *kreadfds = RT_NULL, *kwritefds = RT_NULL, *kexceptfds = RT_NULL; + struct timeval ktimeout, *ptimeout = RT_NULL; if (readfds) { @@ -1016,8 +1017,18 @@ sysret_t sys_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptf } lwp_get_from_user(kexceptfds, exceptfds, sizeof *kexceptfds); } + if (timeout) + { + if (!lwp_user_accessable((void *)timeout, sizeof *timeout)) + { + SET_ERRNO(EFAULT); + goto quit; + } + lwp_get_from_user(&ktimeout, timeout, sizeof ktimeout); + ptimeout = &ktimeout; + } - ret = select(nfds, kreadfds, kwritefds, kexceptfds, timeout); + ret = select(nfds, kreadfds, kwritefds, kexceptfds, ptimeout); if (kreadfds) { lwp_put_to_user(readfds, kreadfds, sizeof *kreadfds); |