[xen staging] tools/xenstored: Stash the correct request in lu_status->in

[patchbot@xxxxxxx]

commit 09e2cd69956fe529bfc3d53dae477b44eff217d1
Author:     Julien Grall <jgrall@xxxxxxxxxx>
AuthorDate: Thu Jul 1 15:03:07 2021 +0100
Commit:     Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Tue Jul 6 09:50:57 2021 +0100

    tools/xenstored: Stash the correct request in lu_status->in
    
    When Live-Updating with some load, Xenstored may hit the assert
    req->in == lu_status->in in do_lu_start().
    
    This is happening because the request is stashed when Live-Update
    begins. This happens in a different request (see call lu_begin()
    when select the new binary) from the one performing Live-Update.
    
    To avoid the problem, stash the request in lu_start().
    
    Fixes: 65f19ed62aa1 ("tools/xenstore: Don't assume conn->in points to the 
LU request")
    Reported-by: Michael Kurth <mku@xxxxxxxxxx>
    Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
    Reviewed-by: luca.fancellu@xxxxxxx
    Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
---
 tools/xenstore/xenstored_control.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/xenstore/xenstored_control.c 
b/tools/xenstore/xenstored_control.c
index a1b1bd5a71..ff9863c17f 100644
--- a/tools/xenstore/xenstored_control.c
+++ b/tools/xenstore/xenstored_control.c
@@ -103,7 +103,6 @@ static const char *lu_begin(struct connection *conn)
        if (!lu_status)
                return "Allocation failure.";
        lu_status->conn = conn;
-       lu_status->in = conn->in;
        talloc_set_destructor(lu_status, lu_destroy);
 
        return NULL;
@@ -757,6 +756,7 @@ static const char *lu_start(const void *ctx, struct 
connection *conn,
        lu_status->force = force;
        lu_status->timeout = to;
        lu_status->started_at = time(NULL);
+       lu_status->in = conn->in;
 
        errno = delay_request(conn, conn->in, do_lu_start, conn, false);
 
--
generated by git-patchbot for /home/xen/git/xen.git#staging