6.5-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@linaro.org
commit 07bb00ef00ace88dd6f695fadbba76565756e55c upstream.
In this code "ret" is type long and "src_objlen" is unsigned int. The problem is that on 32bit systems, when we do the comparison signed longs are type promoted to unsigned int. So negative error codes from do_splice_direct() are treated as success instead of failure.
Cc: stable@vger.kernel.org Fixes: 1b0c3b9f91f0 ("ceph: re-org copy_file_range and fix some error paths") Signed-off-by: Dan Carpenter dan.carpenter@linaro.org Reviewed-by: Xiubo Li xiubli@redhat.com Signed-off-by: Ilya Dryomov idryomov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ceph/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -2559,7 +2559,7 @@ static ssize_t __ceph_copy_file_range(st ret = do_splice_direct(src_file, &src_off, dst_file, &dst_off, src_objlen, flags); /* Abort on short copies or on error */ - if (ret < src_objlen) { + if (ret < (long)src_objlen) { dout("Failed partial copy (%zd)\n", ret); goto out; }