From nobody Fri Dec 19 19:17:20 2025 Received: from mail-pf1-f179.google.com (mail-pf1-f179.google.com [209.85.210.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 862D72773DE for ; Fri, 7 Nov 2025 04:11:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762488683; cv=none; b=iUMGpzzAtiw9eBi3ICxawHX1nk1n4utJ9uv/y7yGVcKQ6Po2RNZBdJODW0BNjzOrq7Gz3vizreInR7o95TFzmnZZNj+/1iUjpLSYv2OWbEERTMkUQtoShrmJL5iPSXOL0+y4e1xzkbOUl2XW+xbmmy9wp9BrgbvEQ6WFKKeVt8M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762488683; c=relaxed/simple; bh=4Zk8MXXmDdkOu+U1cEM8A5GphCzC0fyVF7jnwu8pbKE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=hFa7scmvbgj5dOcTQyVGwGl6PGjcYv7V5FNeqBYOHH9Jx6PpmkpDXyw5tUtIILruab5niYZux5/BXUnP7QZzgZ0T6ixvota5QBSx3SM5T3iBAhyGIQZ2b2eVLxfdTe8CiZwRIMvKTN/0MwfyEJ15By6/gOPiOzUnyB7Q44z4+uY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=BFlwnPFC; arc=none smtp.client-ip=209.85.210.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BFlwnPFC" Received: by mail-pf1-f179.google.com with SMTP id d2e1a72fcca58-7aa2170adf9so311780b3a.0 for ; Thu, 06 Nov 2025 20:11:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1762488682; x=1763093482; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=UB1bXzlzFcUbuTT9ZaXIDznGKcuL53MySKJi6hY373E=; b=BFlwnPFCfWpHAefcmfDFQCZSfkKhL6HEXSxhCM6yEP0ZyCH1D/9lJxi9nn6HqA3trM HS783KCxnHZGzc7XTGOXag9Qkvor4MJklnZwUGfOcw04HEiVtRPvHv1blIOR69RY2HjW Hrd/dUyWLZqruRWuiqfVoXlYvFXvvp1jNjJc2Yx4paYcEVF/5K359v8HQPREXKCGpebl OCG44XnvJTvhvldL2WOzFpGHZKfJbg0KLQR6+rFQDFtD2oEDsNzHyb2pLRLQINNI2MYu +P5NYSmC0QAQlgRHwdYEgEtezn86rkth3RqJpcnYFdT2IBhGsAaZQsT3ICEENySUjsQN YoSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762488682; x=1763093482; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=UB1bXzlzFcUbuTT9ZaXIDznGKcuL53MySKJi6hY373E=; b=fqU6UJtl9cP1twfrfmaY9f5otD3ylgKwLtKfDmhRHMJ2+hRmOshh84YWTTikmJcUfL 6fE8DP+uebFyFWPgMQXUjOUdiImYbUOTe+O3N9r2TdfxIwzzhADZ4R+wSxHEp+ubNgW6 ng0Eb24KlbKmIshWEZexTECWk+MKRocXh+sNp3sZ6J+1jwomG7KR2DfWVSPJ71Uyu+K4 fVLdOCAtkSQw1gRBAfo12g/P2mWNwdBMrk4jpYVsgQddsxCrHf3Ue7dmuESNW6vXI460 II9/fk/l1n+pxz9EHUh7Fx9i57K0xIp4B9aZOAMpLXnLx409o/nmLgihdjuKzCYPrAGH X9Bg== X-Forwarded-Encrypted: i=1; AJvYcCVaDPz3PZdSDDEePQEpVWGDTQEmDtDEahkUMqJwH5oSJN+j8CAHlt7Ukhn5GyxtQZ2T7Ztx+ICnYbYhBXg=@vger.kernel.org X-Gm-Message-State: AOJu0Yxb3PIDeDrZFXVFe+a6YeLCxYQSsPGR49wRKe/7B+f70ZYZRfBD mxY06EUSBykguq28v1peaEHrb+Koomr2E8B68b92XJwsOg8gA96q4Sgj X-Gm-Gg: ASbGncv/SZ2TWZcdvckWuCYE+bskVdqMSQeSLWgljOWaJtCnnW8yefEjz1/4eo0VYkk dYTfdyWXm9OB8EeTM/+sJG88ogxY+tiCql9F28pTky0UertQPSHT/BWOU5uv7ZPozUJ/xW2N5zd SbUI+QkHlIHlB6+UpZI7XI13nVnzhbwC4b69nFBR+pAgMQM720hcbXPjE4J6Y2TkPnGa+zU6ByI PGt5uWHM5Du9H5iB68jsnfRAx6IS8e0m9bS27ih2Dgmz4y+0W9tqBNtAKIvqBVHWFpZJfY1q5nz W87bAkqCiSJ8OAowqcdiBCom2e3BHcfyAckGvZFhz9eW/isIjrEiMIoywOzckZbur/RePuENmgc M1Yb+6n9ON7QFs0mBxpcRysq307pxDzxMhoUs2Wvf6ODjiAnjDaH8xbK1UL5MU/+j4S4VadG4ck DtH/+bsy9dvZwaYa0Q X-Google-Smtp-Source: AGHT+IFTBdtjUvs97i0n6PZZPCRYPFFLtE+1ia2eL7OO1k3lvWBqZorflY6YekXtzcFlMjotdUuR/A== X-Received: by 2002:a05:6a00:896:b0:7ab:75fc:f8bc with SMTP id d2e1a72fcca58-7b0bb81fc9amr2493970b3a.1.1762488681758; Thu, 06 Nov 2025 20:11:21 -0800 (PST) Received: from crl-3.node2.local ([125.63.65.162]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7b0c9c08ee9sm1289384b3a.21.2025.11.06.20.11.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Nov 2025 20:11:21 -0800 (PST) From: Kriish Sharma To: Jason Gunthorpe , Leon Romanovsky , Vlad Dumitrescu , Parav Pandit , Edward Srouji Cc: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Kriish Sharma , syzbot+938fcd548c303fe33c1a@syzkaller.appspotmail.com Subject: [PATCH] RDMA/core: Fix uninitialized gid in ib_nl_process_good_ip_rsep() Date: Fri, 7 Nov 2025 04:10:02 +0000 Message-Id: <20251107041002.2091584-1-kriish.sharma2006@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" KMSAN reported a use of uninitialized memory in hex_byte_pack() via ip6_string() when printing %pI6 from ib_nl_handle_ip_res_resp(). If the LS_NLA_TYPE_DGID attribute is missing, 'gid' remains uninitialized before being used in pr_info(), leading to a KMSAN uninit-value report. Reported-by: syzbot+938fcd548c303fe33c1a@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=3D938fcd548c303fe33c1a Fixes: ae43f8286730 ("IB/core: Add IP to GID netlink offload") Signed-off-by: Kriish Sharma --- drivers/infiniband/core/addr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c index 61596cda2b65..4c602fcae12f 100644 --- a/drivers/infiniband/core/addr.c +++ b/drivers/infiniband/core/addr.c @@ -99,7 +99,7 @@ static inline bool ib_nl_is_good_ip_resp(const struct nlm= sghdr *nlh) static void ib_nl_process_good_ip_rsep(const struct nlmsghdr *nlh) { const struct nlattr *head, *curr; - union ib_gid gid; + union ib_gid gid =3D {}; struct addr_req *req; int len, rem; int found =3D 0; --=20 2.34.1