From ba988903937c1b1ce5d54567b50f2ad9604b3bfe Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 23 May 2020 09:30:16 +0200 Subject: ext4: remove the access_ok() check in ext4_ioctl_get_es_cache access_ok just checks we are fed a proper user pointer. We also do that in copy_to_user itself, so no need to do this early. Signed-off-by: Christoph Hellwig Reviewed-by: Ritesh Harjani Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20200523073016.2944131-10-hch@lst.de Signed-off-by: Theodore Ts'o --- fs/ext4/ioctl.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'fs') diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index f81acbbb1b12..2162db0c747d 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -754,11 +754,6 @@ static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg) fieinfo.fi_extents_max = fiemap.fm_extent_count; fieinfo.fi_extents_start = ufiemap->fm_extents; - if (fiemap.fm_extent_count != 0 && - !access_ok(fieinfo.fi_extents_start, - fieinfo.fi_extents_max * sizeof(struct fiemap_extent))) - return -EFAULT; - error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, fiemap.fm_length); fiemap.fm_flags = fieinfo.fi_flags; -- cgit v1.2.3-59-g8ed1b