diff options
Diffstat (limited to 'fs/compat.c')
| -rw-r--r-- | fs/compat.c | 47 |
1 files changed, 19 insertions, 28 deletions
diff --git a/fs/compat.c b/fs/compat.c index f2944ace7a7..6161255fac4 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -144,8 +144,8 @@ static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) tmp.st_nlink = stat->nlink; if (tmp.st_nlink != stat->nlink) return -EOVERFLOW; - SET_UID(tmp.st_uid, stat->uid); - SET_GID(tmp.st_gid, stat->gid); + SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid)); + SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid)); tmp.st_rdev = old_encode_dev(stat->rdev); if ((u64) stat->size > MAX_NON_LFS) return -EOVERFLOW; @@ -532,7 +532,7 @@ out: ssize_t compat_rw_copy_check_uvector(int type, const struct compat_iovec __user *uvector, unsigned long nr_segs, unsigned long fast_segs, struct iovec *fast_pointer, - struct iovec **ret_pointer, int check_access) + struct iovec **ret_pointer) { compat_ssize_t tot_len; struct iovec *iov = *ret_pointer = fast_pointer; @@ -579,7 +579,7 @@ ssize_t compat_rw_copy_check_uvector(int type, } if (len < 0) /* size_t not fitting in compat_ssize_t .. */ goto out; - if (check_access && + if (type >= 0 && !access_ok(vrfy_dir(type), compat_ptr(buf), len)) { ret = -EFAULT; goto out; @@ -871,12 +871,12 @@ asmlinkage long compat_sys_old_readdir(unsigned int fd, { int error; struct file *file; + int fput_needed; struct compat_readdir_callback buf; - error = -EBADF; - file = fget(fd); + file = fget_light(fd, &fput_needed); if (!file) - goto out; + return -EBADF; buf.result = 0; buf.dirent = dirent; @@ -885,8 +885,7 @@ asmlinkage long compat_sys_old_readdir(unsigned int fd, if (buf.result) error = buf.result; - fput(file); -out: + fput_light(file, fput_needed); return error; } @@ -953,16 +952,15 @@ asmlinkage long compat_sys_getdents(unsigned int fd, struct file * file; struct compat_linux_dirent __user * lastdirent; struct compat_getdents_callback buf; + int fput_needed; int error; - error = -EFAULT; if (!access_ok(VERIFY_WRITE, dirent, count)) - goto out; + return -EFAULT; - error = -EBADF; - file = fget(fd); + file = fget_light(fd, &fput_needed); if (!file) - goto out; + return -EBADF; buf.current_dir = dirent; buf.previous = NULL; @@ -979,8 +977,7 @@ asmlinkage long compat_sys_getdents(unsigned int fd, else error = count - buf.count; } - fput(file); -out: + fput_light(file, fput_needed); return error; } @@ -1041,16 +1038,15 @@ asmlinkage long compat_sys_getdents64(unsigned int fd, struct file * file; struct linux_dirent64 __user * lastdirent; struct compat_getdents_callback64 buf; + int fput_needed; int error; - error = -EFAULT; if (!access_ok(VERIFY_WRITE, dirent, count)) - goto out; + return -EFAULT; - error = -EBADF; - file = fget(fd); + file = fget_light(fd, &fput_needed); if (!file) - goto out; + return -EBADF; buf.current_dir = dirent; buf.previous = NULL; @@ -1068,8 +1064,7 @@ asmlinkage long compat_sys_getdents64(unsigned int fd, else error = count - buf.count; } - fput(file); -out: + fput_light(file, fput_needed); return error; } #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ @@ -1094,7 +1089,7 @@ static ssize_t compat_do_readv_writev(int type, struct file *file, goto out; tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs, - UIO_FASTIOV, iovstack, &iov, 1); + UIO_FASTIOV, iovstack, &iov); if (tot_len == 0) { ret = 0; goto out; @@ -1547,7 +1542,6 @@ asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg) compat_ptr(a.exp), compat_ptr(a.tvp)); } -#ifdef HAVE_SET_RESTORE_SIGMASK static long do_compat_pselect(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp, compat_ulong_t __user *exp, struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, @@ -1670,11 +1664,9 @@ asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, return ret; } -#endif /* HAVE_SET_RESTORE_SIGMASK */ #ifdef CONFIG_EPOLL -#ifdef HAVE_SET_RESTORE_SIGMASK asmlinkage long compat_sys_epoll_pwait(int epfd, struct compat_epoll_event __user *events, int maxevents, int timeout, @@ -1718,7 +1710,6 @@ asmlinkage long compat_sys_epoll_pwait(int epfd, return err; } -#endif /* HAVE_SET_RESTORE_SIGMASK */ #endif /* CONFIG_EPOLL */ |