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authorChristoph Hellwig <hch@lst.de>2020-05-23 09:30:16 +0200
committerTheodore Ts'o <tytso@mit.edu>2020-06-03 23:16:55 -0400
commitba988903937c1b1ce5d54567b50f2ad9604b3bfe (patch)
treefbd513ee562021b45b3c1890734d552e2d25ca1d /fs/ext4
parentc7d216e8c44cfc0b680d8c0de4f9bdafd92f7ef6 (diff)
downloadlinux-ba988903937c1b1ce5d54567b50f2ad9604b3bfe.tar.bz2
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 <hch@lst.de> Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20200523073016.2944131-10-hch@lst.de Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ioctl.c5
1 files changed, 0 insertions, 5 deletions
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;