tree 733ed2ab3f3d856302b7aef5b1ff0557b0e5b2b3
parent fdf5078458793fca9e9c0fb5e58a1a970ca0fdef
author Dan Carpenter <dan.carpenter@oracle.com> 1632256415 +0300
committer Steve French <stfrench@microsoft.com> 1632275510 -0500

cifs: fix a sign extension bug

The problem is the mismatched types between "ctx->total_len" which is
an unsigned int, "rc" which is an int, and "ctx->rc" which is a
ssize_t.  The code does:

	ctx->rc = (rc == 0) ? ctx->total_len : rc;

We want "ctx->rc" to store the negative "rc" error code.  But what
happens is that "rc" is type promoted to a high unsigned int and
'ctx->rc" will store the high positive value instead of a negative
value.

The fix is to change "rc" from an int to a ssize_t.

Fixes: c610c4b619e5 ("CIFS: Add asynchronous write support through kernel AIO")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <stfrench@microsoft.com>