From 84fd081f8ae92e05ace47d24e58f26f7af2994c7 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 7 Jan 2020 15:25:38 -0800 Subject: xfs: reject invalid flags combinations in XFS_IOC_ATTRMULTI_BY_HANDLE While the flags field in the ABI and the on-disk format allows for multiple namespace flags, that is a logically invalid combination that scrub complains about. Reject it at the ioctl level, as all other interface already get this right at higher levels. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_ioctl.c | 5 +++++ fs/xfs/xfs_ioctl32.c | 5 +++++ 2 files changed, 10 insertions(+) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index edfbdb8f85e2..17b4a981be4d 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -462,6 +462,11 @@ xfs_attrmulti_by_handle( error = 0; for (i = 0; i < am_hreq.opcount; i++) { + if ((ops[i].am_flags & ATTR_ROOT) && + (ops[i].am_flags & ATTR_SECURE)) { + ops[i].am_error = -EINVAL; + continue; + } ops[i].am_flags &= ~ATTR_KERNEL_FLAGS; ops[i].am_error = strncpy_from_user((char *)attr_name, diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c index 20b3edc10f48..769581a79c58 100644 --- a/fs/xfs/xfs_ioctl32.c +++ b/fs/xfs/xfs_ioctl32.c @@ -450,6 +450,11 @@ xfs_compat_attrmulti_by_handle( error = 0; for (i = 0; i < am_hreq.opcount; i++) { + if ((ops[i].am_flags & ATTR_ROOT) && + (ops[i].am_flags & ATTR_SECURE)) { + ops[i].am_error = -EINVAL; + continue; + } ops[i].am_flags &= ~ATTR_KERNEL_FLAGS; ops[i].am_error = strncpy_from_user((char *)attr_name, -- cgit v1.2.3