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btrfs: don't rewrite ret from inode_permission

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[ Upstream commit 0185c2292c600993199bc6b1f342ad47a9e8c678 ]

In our user safe ino resolve ioctl we'll just turn any ret into -EACCES
from inode_permission().  This is redundant, and could potentially be
wrong if we had an ENOMEM in the security layer or some such other
error, so simply return the actual return value.

Note: The patch was taken from v5 of fscrypt patchset
(https://lore.kernel.org/linux-btrfs/cover.1706116485.git.josef@toxicpanda.com/)
which was handled over time by various people: Omar Sandoval, Sweet Tea
Dorminy, Josef Bacik.

Fixes: 23d0b79dfa ("btrfs: Add unprivileged version of ino_lookup ioctl")
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Daniel Vacek <neelx@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add note ]
Signed-off-by: David Sterba <dsterba@suse.com>
[ Adjust context ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Josef Bacik
2025-12-29 16:51:49 -05:00
committed by Greg Kroah-Hartman
parent 0baa9f64bf
commit bb2805532f
1 changed files with 1 additions and 3 deletions
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4
fs/btrfs/ioctl.c
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@@ -2006,10 +2006,8 @@ static int btrfs_search_path_in_tree_user(struct mnt_idmap *idmap,
ret = inode_permission(idmap, temp_inode,
MAY_READ | MAY_EXEC);
iput(temp_inode);
if (ret) {
ret = -EACCES;
if (ret)
goto out_put;
}
if (key.offset == upper_limit.objectid)
break;