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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752554138; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aE/wKQGzoh4jWmtAUGCBzWi5yGD7I8dxBOHfLcHtRck=; b=eHs606nD+7gyLjXNwhLxeGqVs6KWSL54Ut7yAld5fJFooEVTVvauPDWtiSm6G9yIsxQJ3T /W4DskHlbxX1rW9N9PRAV/gDp7tVgZ9dx4KthImYDiZ5rOI9V9SbgTd8LpU6wLLutl2X2S KmMfB7h+DzGxv4CUR/4ThdB8tGlKT9c= X-MC-Unique: 67LQGCXROf68Xra4YuJIgw-1 X-Mimecast-MFC-AGG-ID: 67LQGCXROf68Xra4YuJIgw_1752554134 From: Jason Wang To: qemu-devel@nongnu.org Cc: Anastasia Belova , qemu-stable@nongnu.org, Ilya Maximets , Jason Wang Subject: [PULL V2 01/16] net: fix buffer overflow in af_xdp_umem_create() Date: Tue, 15 Jul 2025 12:35:09 +0800 Message-ID: <20250715043524.21719-2-jasowang@redhat.com> In-Reply-To: <20250715043524.21719-1-jasowang@redhat.com> References: <20250715043524.21719-1-jasowang@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" From: Anastasia Belova s->pool has n_descs elements so maximum i should be n_descs - 1. Fix the upper bound. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: cb039ef3d9 ("net: add initial support for AF_XDP network backend") Cc: qemu-stable@nongnu.org Reviewed-by: Ilya Maximets Signed-off-by: Anastasia Belova Signed-off-by: Jason Wang --- net/af-xdp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/af-xdp.c b/net/af-xdp.c index 01c5fb914e..d022534d76 100644 --- a/net/af-xdp.c +++ b/net/af-xdp.c @@ -323,7 +323,7 @@ static int af_xdp_umem_create(AFXDPState *s, int sock_f= d, Error **errp) =20 s->pool =3D g_new(uint64_t, n_descs); /* Fill the pool in the opposite order, because it's a LIFO queue. */ - for (i =3D n_descs; i >=3D 0; i--) { + for (i =3D n_descs - 1; i >=3D 0; i--) { s->pool[i] =3D i * XSK_UMEM__DEFAULT_FRAME_SIZE; } s->n_pool =3D n_descs; --=20 2.42.0