Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753021AbaKGQ2W (ORCPT ); Fri, 7 Nov 2014 11:28:22 -0500 Received: from mail-la0-f50.google.com ([209.85.215.50]:51875 "EHLO mail-la0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752640AbaKGQ2T (ORCPT ); Fri, 7 Nov 2014 11:28:19 -0500 MIME-Version: 1.0 In-Reply-To: References: Date: Fri, 7 Nov 2014 11:28:17 -0500 Message-ID: Subject: Re: [PATCH v5 2/7] vfs: Define new syscalls preadv2,pwritev2 From: Milosz Tanski To: Jeff Moyer Cc: LKML , Christoph Hellwig , "linux-fsdevel@vger.kernel.org" , "linux-aio@kvack.org" , Mel Gorman , Volker Lendecke , Tejun Heo , "Theodore Ts'o" , Al Viro , Linux API , Michael Kerrisk , linux-arch@vger.kernel.org, linux-mm@kvack.org Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 6, 2014 at 6:25 PM, Jeff Moyer wrote: > Milosz Tanski writes: > >> New syscalls that take an flag argument. This change does not add any specific >> flags. >> >> Signed-off-by: Milosz Tanski >> Reviewed-by: Christoph Hellwig >> --- >> fs/read_write.c | 176 ++++++++++++++++++++++++++++++-------- >> include/linux/compat.h | 6 ++ >> include/linux/syscalls.h | 6 ++ >> include/uapi/asm-generic/unistd.h | 6 +- >> mm/filemap.c | 5 +- >> 5 files changed, 158 insertions(+), 41 deletions(-) >> >> diff --git a/fs/read_write.c b/fs/read_write.c >> index 94b2d34..907735c 100644 >> --- a/fs/read_write.c >> +++ b/fs/read_write.c >> @@ -866,6 +866,8 @@ ssize_t vfs_readv(struct file *file, const struct iovec __user *vec, >> return -EBADF; >> if (!(file->f_mode & FMODE_CAN_READ)) >> return -EINVAL; >> + if (flags & ~0) >> + return -EINVAL; >> >> return do_readv_writev(READ, file, vec, vlen, pos, flags); >> } >> @@ -879,21 +881,23 @@ ssize_t vfs_writev(struct file *file, const struct iovec __user *vec, >> return -EBADF; >> if (!(file->f_mode & FMODE_CAN_WRITE)) >> return -EINVAL; >> + if (flags & ~0) >> + return -EINVAL; >> >> return do_readv_writev(WRITE, file, vec, vlen, pos, flags); >> } > > Hi, Milosz, > > You've checked for invalid flags for the normal system calls, but not > for the compat variants. Can you add that in, please? > > Thanks! > Jeff That's a good catch Jeff I'll fix this and it'll be in the next version of the patch series. - M -- Milosz Tanski CTO 16 East 34th Street, 15th floor New York, NY 10016 p: 646-253-9055 e: milosz@adfin.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/