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| author |   Christoph Hellwig <hch@lst.de> | 2020-01-07 15:25:37 -0800 |
|---|---|---|
| committer |   Darrick J. Wong <darrick.wong@oracle.com> | 2020-01-09 10:55:18 -0800 |
| commit | 953aa9d136f53e226448dbd801a905c28f8071bf (patch) | |
| tree | 1a5df80de0c912b38da8efc3ddd600e02cf31563 /fs/xfs/xfs_ioctl32.c | |
| parent | xfs: remove shadow variable in xfs_btree_lshift (diff) | |
| download | linux-dev-953aa9d136f53e226448dbd801a905c28f8071bf.tar.xz linux-dev-953aa9d136f53e226448dbd801a905c28f8071bf.zip | |
xfs: clear kernel only flags in XFS_IOC_ATTRMULTI_BY_HANDLE
Don't allow passing arbitrary flags as they change behavior including
memory allocation that the call stack is not prepared for.
Fixes: ddbca70cc45c ("xfs: allocate xattr buffer on demand")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_ioctl32.c')
| -rw-r--r-- | fs/xfs/xfs_ioctl32.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c index a49bd80b2c3b..20b3edc10f48 100644 --- a/fs/xfs/xfs_ioctl32.c +++ b/fs/xfs/xfs_ioctl32.c @@ -450,6 +450,8 @@ xfs_compat_attrmulti_by_handle( error = 0; for (i = 0; i < am_hreq.opcount; i++) { + ops[i].am_flags &= ~ATTR_KERNEL_FLAGS; + ops[i].am_error = strncpy_from_user((char *)attr_name, compat_ptr(ops[i].am_attrname), MAXNAMELEN); |