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

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

arch/parisc/kernel/sys_parisc32.c

+8 −2
Original line number Diff line number Diff line
@@ -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;

	}