The patch titled sg_io: don't perform unneeded copy in compat code has been added to the -mm tree. Its filename is sg_io-dont-perform-unneeded-copy-in-compat-code.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: sg_io: don't perform unneeded copy in compat code From: Alexey Zaytsev <alexey.zaytsev@xxxxxxxxx> The members from 'status' in struct sg_io_hdr to the last are used to transfer information from kernel to user space. The values that user space sets are just ignored. Signed-off-by: Alexey Zaytsev <alexey.zaytsev@xxxxxxxxx> Cc: Douglas Gilbert <dgilbert@xxxxxxxxxxxx> Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> Cc: Jens Axboe <jens.axboe@xxxxxxxxxx> Cc: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/compat_ioctl.c | 6 ------ 1 file changed, 6 deletions(-) diff -puN fs/compat_ioctl.c~sg_io-dont-perform-unneeded-copy-in-compat-code fs/compat_ioctl.c --- a/fs/compat_ioctl.c~sg_io-dont-perform-unneeded-copy-in-compat-code +++ a/fs/compat_ioctl.c @@ -782,12 +782,6 @@ static int sg_ioctl_trans(unsigned int f if (put_user(compat_ptr(data), &sgio->usr_ptr)) return -EFAULT; - if (copy_in_user(&sgio->status, &sgio32->status, - (4 * sizeof(unsigned char)) + - (2 * sizeof(unsigned (short))) + - (3 * sizeof(int)))) - return -EFAULT; - err = sys_ioctl(fd, cmd, (unsigned long) sgio); if (err >= 0) { _ Patches currently in -mm which might be from alexey.zaytsev@xxxxxxxxx are linux-next.patch sg_io-dont-perform-unneeded-copy-in-compat-code.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html