Commit 2c8307f6 authored by Alexandr Andreev's avatar Alexandr Andreev Committed by Kyle McMartin

parisc: sync compat getdents

Add VERIFY_WRITE check in the beginning like compat_sys_getdents() EFAULT on
parisc if put_user() fails.
Signed-off-by: default avatarAlexandr Andreev <aandreev@openvz.org>
Signed-off-by: default avatarAlexey Dobriyan <adobriyan@openvz.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Matthew Wilcox <willy@debian.org>
Cc: Grant Grundler <grundler@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarKyle McMartin <kyle@parisc-linux.org>
parent 01da41b8
......@@ -350,6 +350,10 @@ sys32_getdents (unsigned int fd, void __user * dirent, unsigned int count)
struct getdents32_callback buf;
int error;
error = -EFAULT;
if (!access_ok(VERIFY_WRITE, dirent, count))
goto out;
error = -EBADF;
file = fget(fd);
if (!file)
......@@ -366,7 +370,9 @@ sys32_getdents (unsigned int fd, void __user * dirent, unsigned int count)
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
put_user(file->f_pos, &lastdirent->d_off);
if (put_user(file->f_pos, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
......
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