From nobody Sat Jun 21 17:33:40 2025 X-Original-To: net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4bPhK02yKPz5ynHM for ; Sat, 21 Jun 2025 17:33:40 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4bPhK01s3Mz4Nk7 for ; Sat, 21 Jun 2025 17:33:40 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1750527220; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=w48NR2S9DbJ7Xka8l4R6uiDELkIRqZ1RehkuhrJVSoE=; b=RkMhVUIYjH1+MWZGJFXWmrKauuwFmtR6iaNWu2GuXQUEpPo5rArxaCJ9xdm2omVccKTc+8 6FS1Dktil35hww4GK/jq38m1YPZ/FOOkK4uAkKl5DrQNtbtzzGMNGRmxqXlj8zPMhwVa6r xxJ+rcVfCaXYZk4ZV6RdnZRM45BU3llPvIZUVQ8xTMQiHM4TH4hZNc9Z+VaTaHBbujL6cC fKz6KUtNCC0Lf6w6y8AXWwsdZsIDNhBwfzotXpqVIazwObJg2dZ17YTiOt4i4kJT8Quig8 Zhj1TKMhaNrvJWchwCJP6I5YLHmZCLQeNxeZlW7/gn3svQyp4jNU0Qe76F9WVA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1750527220; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=w48NR2S9DbJ7Xka8l4R6uiDELkIRqZ1RehkuhrJVSoE=; b=kJ2GmP0w4qzLh7D56IplNlJwl+/QUuNZklWGSZ0qWBLmXLWLlkiqjBm/WvdBjPfE0ahHRK xAPZqTZPhOM7mAbWUPYhRT+BhHv4n0o9TWfCIRzHfEUjoeMQmJgwDK5MLHlSKGCVcbDgJo T6ME2Var1p9UD57rpXaLka0MbUr28yYNdobSSqtJ92dsJbmdsXa31W2BsdyIqjUazyNxXR HTTcAUMJFjMHv6WXFAyXNu8czE+6tbvd++4WulSCHg6r2DSDBTHATfdqZo0iLJxK20tB88 EehpRijUgh/tQfxGFJeSWVGLVLxSAtf2lxTOqYvvmEjPAVl3PgJDKZ+Q+ddHNA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1750527220; a=rsa-sha256; cv=none; b=KsAlHlvLnYXSAhAFSs6Jgh3Bk6umq8Xbcf0bvC7jHbcS/lMECuVshpzTMqWNi8A+I2oJre +Ua7mpR9P0O5VAQNyvaC2HZ5hZssRufZL2qamOT2bxSCJllXSXfc9vxzECFmn0cDTmT5Ey 3o5TL+J+1r9aXmgu5ElNNWsobHX3LhAoOfeWzbpaGabYfW5UA1x7U/PwrKPFVd0dHNNv7B QSBzqLVmIoaX3pSXYcl44Qlhz5UzueOf2BPyKaHsUGd8ubtH+yo9kF125NjZXcEIXuf0Fa aoynV9HEKbz/KB04TvUiCm+wtfUnYq+m5GCu9OBLuwoqHnF4hXO1T+YIql8V7Q== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4bPhK01GCvzh61 for ; Sat, 21 Jun 2025 17:33:40 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 55LHXeog003010 for ; Sat, 21 Jun 2025 17:33:40 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 55LHXeDd003009 for net@FreeBSD.org; Sat, 21 Jun 2025 17:33:40 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 287229] IP reassembly issue in FreeBSD 14.1 Date: Sat, 21 Jun 2025 17:33:40 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 14.2-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: glebius@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: tuexen@freebsd.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D287229 --- Comment #36 from Gleb Smirnoff --- On Sat Jun 21 08:55:37 2025 UTC, lucas.aubard@irisa.fr wrote: > How can I disable this feature to test if it indeed provokes the observed > reassembly inconsistencies ? Option #1: you can recompile kernel with patched sys/netinet/ip_reass.c. Change the line V_ipq_hashseed =3D arc4random(); to something non-random, e.g.: V_ipq_hashseed =3D 0; Option #2: at runtime, before running any of your experiments run kernel debugger in the write mode: # kgdb -w Now it depends if your kernel is compiled with VIMAGE or without. If compiled without VIMAGE, then it is easy: (kgbd) set ipq_hashseed =3D 0 If compiled without VIMAGE, then more complicated: (kgdb) set *(uint32_t *)(vnet0->vnet_data_base + (uintptr_t)&vnet_entry_ipq_hashseed) =3D 0 --=20 You are receiving this mail because: You are on the CC list for the bug.=