From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id CBC0C46D7E; Thu, 21 Aug 2025 05:06:56 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 7281940292; Thu, 21 Aug 2025 05:06:56 +0200 (CEST) Received: from inbox.dpdk.org (inbox.dpdk.org [95.142.172.178]) by mails.dpdk.org (Postfix) with ESMTP id 473074026C for ; Thu, 21 Aug 2025 05:06:55 +0200 (CEST) Received: by inbox.dpdk.org (Postfix, from userid 33) id 249EB46D80; Thu, 21 Aug 2025 05:06:55 +0200 (CEST) From: bugzilla@dpdk.org To: dev@dpdk.org Subject: [DPDK/ethdev Bug 1778] MPRQ buffer reference was not decremented upon MLX5_RXQ_CODE_NOMBUF Date: Thu, 21 Aug 2025 03:06:55 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: ethdev X-Bugzilla-Version: 22.11 X-Bugzilla-Keywords: X-Bugzilla-Severity: major X-Bugzilla-Who: canary.overflow@gmail.com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal X-Bugzilla-Assigned-To: dev@dpdk.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: multipart/alternative; boundary=17557456140.c0CD.1830348 Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org --17557456140.c0CD.1830348 Date: Thu, 21 Aug 2025 05:06:54 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All https://bugs.dpdk.org/show_bug.cgi?id=3D1778 Bug ID: 1778 Summary: MPRQ buffer reference was not decremented upon MLX5_RXQ_CODE_NOMBUF Product: DPDK Version: 22.11 Hardware: x86 OS: Linux Status: UNCONFIRMED Severity: major Priority: Normal Component: ethdev Assignee: dev@dpdk.org Reporter: canary.overflow@gmail.com Target Milestone: --- drivers/net/mlx5/mlx5_rx.h mprq_buf_to_pkt(...): In the external buffer attach case where hdrm_overlap > 0, the code did not decrement the buffer refcnt if allocation struct rte_mbuf *next =3D rte_pktmbuf_alloc(rxq->mp) fails mprq_buf_to_pkt(...) { ...=20=20=20=20=20=20=20=20 if (hdrm_overlap > 0) { __atomic_add_fetch(&buf->refcnt, 1, __ATOMIC_RELAXED); ... MLX5_ASSERT(rxq->strd_scatter_en); struct rte_mbuf *seg =3D rte_pktmbuf_alloc(rxq->mp); if (unlikely(seg =3D=3D NULL)) return MLX5_RXQ_CODE_NOMBUF; SET_DATA_OFF(seg, 0); ... } } --=20 You are receiving this mail because: You are the assignee for the bug.= --17557456140.c0CD.1830348 Date: Thu, 21 Aug 2025 05:06:54 +0200 MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All

Bug ID	1778
Summary	MPRQ buffer reference was not decremented upon MLX5_RXQ_CODE_= NOMBUF
Product	DPDK
Version	22.11
Hardware	x86
OS	Linux
Status	UNCONFIRMED
Severity	major
Priority	Normal
Component	ethdev
Assignee	dev@dpdk.org
Reporter	canary.overflow@gmail.com
Target Milestone	---

drivers/net/mlx5/mlx5_rx.h mprq_bu=
f_to_pkt(...):

In the external buffer attach case where hdrm_overlap > 0, the code did =
not
decrement the buffer refcnt if allocation struct rte_mbuf *next =3D
rte_pktmbuf_alloc(rxq->mp) fails

mprq_buf_to_pkt(...) {
    ...=20=20=20=20=20=20=20=20
    if (hdrm_overlap > 0) {
        __atomic_add_fetch(&buf->refcnt, 1, __ATOMIC_RELAXED);
        ...
        MLX5_ASSERT(rxq->strd_scatter_en);
        struct rte_mbuf *seg =3D rte_pktmbuf_alloc(rxq->mp);
        if (unlikely(seg =3D=3D NULL))
            return MLX5_RXQ_CODE_NOMBUF;
        SET_DATA_OFF(seg, 0);
        ...
    }
}

You are receiving this mail because:

You are the assignee for the bug.

=20=20=20=20=20=20=20=20=20=20

= --17557456140.c0CD.1830348--