[PATCH 6.11 035/558] afs: Fix the setting of the server responding flag

[Greg Kroah-Hartman]

6.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Howells <dhowells at redhat.com>

[ Upstream commit ff98751bae40faed1ba9c6a7287e84430f7dec64 ]

In afs_wait_for_operation(), we set transcribe the call responded flag to
the server record that we used after doing the fileserver iteration loop -
but it's possible to exit the loop having had a response from the server
that we've discarded (e.g. it returned an abort or we started receiving
data, but the call didn't complete).

This means that op->server might be NULL, but we don't check that before
attempting to set the server flag.

Fixes: 98f9fda2057b ("afs: Fold the afs_addr_cursor struct in")
Signed-off-by: David Howells <dhowells at redhat.com>
Link: https://lore.kernel.org/r/20240923150756.902363-7-dhowells@redhat.com
cc: Marc Dionne <marc.dionne at auristor.com>
cc: linux-afs at lists.infradead.org
Signed-off-by: Christian Brauner <brauner at kernel.org>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 fs/afs/fs_operation.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/afs/fs_operation.c b/fs/afs/fs_operation.c
index 3546b087e791d..428721bbe4f6e 100644
--- a/fs/afs/fs_operation.c
+++ b/fs/afs/fs_operation.c
@@ -201,7 +201,7 @@ void afs_wait_for_operation(struct afs_operation *op)
 		}
 	}
 
-	if (op->call_responded)
+	if (op->call_responded && op->server)
 		set_bit(AFS_SERVER_FL_RESPONDING, &op->server->flags);
 
 	if (!afs_op_error(op)) {
-- 
2.43.0