5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shyam Prasad N <sprasad@xxxxxxxxxxxxx>
[ Upstream commit e4645cc2f1e2d6f268bb8dcfac40997c52432aed ]
We've seen the in-flight count go into negative with some
internal stress testing in Microsoft.
Adding a WARN when this happens, in hope of understanding
why this happens when it happens.
Signed-off-by: Shyam Prasad N <sprasad@xxxxxxxxxxxxx>
Reviewed-by: Bharath SM <bharathsm@xxxxxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/cifs/smb2ops.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index f83901c1c17a5..b2a7238a34221 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -82,6 +82,7 @@ smb2_add_credits(struct TCP_Server_Info *server,
*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
pr_warn_once("server overflowed SMB3 credits\n");
}
+ WARN_ON_ONCE(server->in_flight == 0);
server->in_flight--;
if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
rc = change_conf(server);
--
2.43.0
