From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96AADEB64D9 for ; Tue, 4 Jul 2023 03:38:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230004AbjGDDiv (ORCPT ); Mon, 3 Jul 2023 23:38:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229450AbjGDDis (ORCPT ); Mon, 3 Jul 2023 23:38:48 -0400 Received: from gandalf.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 64674183; Mon, 3 Jul 2023 20:38:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canb.auug.org.au; s=201702; t=1688441919; bh=lxtstFtduQSfV/bVjp8AFcGu3gmrBrtzQMLVUjriNDw=; h=Date:From:To:Cc:Subject:From; b=cbflC2s4L9L5EfSdJuBC7Fxbaazr0DE/7kIzOaOB8Ug8DI6HMkLS7WyQdHMV7Drf6 YJUdGuYnyjxoWf/4/4uCrin6JPF6dEhhw7AAtDzuUP+D/nNOwMc+v7a+f1UpDqZ7kG 0nNcXXY10Odm9PLx8cgC78g10sSO58ef4dN6aYXKyxCYS3dkL4s7EUn6K7VtpRk/pv F2z45A6ebBs8YajKCk0CP+qHoQzBJI01Rip/iLOww0xxKdz/b/bnzFc5iZ/tw1cGKx 8DaNgpSYHlR1f5Gmg4mzwP2jtF6Z9zxNebeFgk5ERoYB2WNq3DZuwSevxhtJ1KslFr 0kkpiCI/RqaYw== Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Qw7mv3tpDz4wZw; Tue, 4 Jul 2023 13:38:39 +1000 (AEST) Date: Tue, 4 Jul 2023 13:38:37 +1000 From: Stephen Rothwell To: Andrew Morton Cc: Linux Kernel Mailing List , Linux Next Mailing List Subject: linux-next: boot failure after merge of the mm tree Message-ID: <20230704133837.23ba9e49@canb.auug.org.au> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/hKY9hptkzjpmOW3tPSym29u"; protocol="application/pgp-signature"; micalg=pgp-sha256 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/hKY9hptkzjpmOW3tPSym29u Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi all, After merging the mm tree, today's linux-next qemu boot test (powerpc pseries_le_defconfig) failed like this: Run /init as init process BUG: Kernel NULL pointer dereference on read at 0x00000008 Faulting instruction address: 0xc000000000468ed0 Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=3D64K MMU=3DHash SMP NR_CPUS=3D2048 NUMA pSeries Modules linked in: CPU: 0 PID: 1 Comm: init Not tainted 6.4.0-13165-g408ff5108632 #2 Hardware name: IBM pSeries (emulated by qemu) POWER8 (raw) 0x4d0200 0xf000= 004 of:SLOF,HEAD pSeries NIP: c000000000468ed0 LR: c000000000468410 CTR: 0000000000000000 REGS: c00000000479b960 TRAP: 0300 Not tainted (6.4.0-13165-g408ff510863= 2) MSR: 8000000000009033 CR: 24024800 XER: 00000000 CFAR: c00000000000db4c DAR: 0000000000000008 DSISR: 40000000 IRQMASK: 0=20 GPR00: c000000000468410 c00000000479bc00 c000000001568f00 c0000000041a6180= =20 GPR04: 000000007fff8785 c00000000479bbe0 c00000000479bc98 0000000000000000= =20 GPR08: ff7fffffffffefbf c00000000153cb10 c000000000432860 0000000000002000= =20 GPR12: c00000000445fb08 c000000002b00000 0000000000000000 0000000000000000= =20 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000= =20 GPR20: 0000000000000000 0000000000000000 c0000000029901a0 c00000000692d000= =20 GPR24: c0000000029901a8 0000000000000075 0000000000000000 c0000000029901b0= =20 GPR28: 0000000000000354 c00000000693fcf0 c00000000693fcf0 0000000000000000= =20 NIP [c000000000468ed0] __handle_mm_fault+0xeb0/0x18a0 LR [c000000000468410] __handle_mm_fault+0x3f0/0x18a0 Call Trace: [c00000000479bc00] [c000000000468410] __handle_mm_fault+0x3f0/0x18a0 (unre= liable) [c00000000479bd00] [c000000000469970] handle_mm_fault+0xb0/0x350 [c00000000479bd50] [c0000000000894b4] ___do_page_fault+0x214/0x920 [c00000000479bdf0] [c000000000089c70] hash__do_page_fault+0x30/0xc0 [c00000000479be20] [c0000000000930a4] do_hash_fault+0x1d4/0x330 [c00000000479be50] [c00000000000904c] instruction_access_common_virt+0x20c= /0x210 --- interrupt: 400 at 0x7fff878510a0 NIP: 00007fff878510a0 LR: 0000000000000000 CTR: 0000000000000000 REGS: c00000000479be80 TRAP: 0400 Not tainted (6.4.0-13165-g408ff510863= 2) MSR: 800000004000d033 CR: 00000000 XER: 00000= 000 CFAR: c00000000000d7bc IRQMASK: 0=20 GPR00: 0000000000000000 00007fffeb1b47a0 0000000000000000 0000000000000000= =20 GPR04: 0000000000000000 0000000000000000 0000000000000000 0000000000000000= =20 GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000= =20 GPR12: 00007fff878510a0 0000000000000000 0000000000000000 0000000000000000= =20 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000= =20 GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000= =20 GPR24: 0000000000000000 0000000000000000 0000000000000000 0000000000000000= =20 GPR28: 0000000000000000 0000000000000000 0000000000000000 0000000000000000= =20 NIP [00007fff878510a0] 0x7fff878510a0 LR [0000000000000000] 0x0 --- interrupt: 400 Code: 73e90973 4082060c 38610038 4bffe5dd 7c7fe378 73e90d73 408205ec 38610= 038 4bff7ad9 7fff1b78 4bfff728 eb410088 71480001 4082078c e92900= 38=20 ---[ end trace 0000000000000000 ]--- I don't know what caused this, but reverting the mm tree fixed the failure. So I have done that for today. --=20 Cheers, Stephen Rothwell --Sig_/hKY9hptkzjpmOW3tPSym29u Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAmSjlD4ACgkQAVBC80lX 0Gz8JQgAm7TSMchN48+LgSHwMRZ5R+78XYh/6ch8Z4qff4IawrCijY7pheXNG5zR diFYPUGIrWtdXaKfSTiwi8VYQhwquEJaLpnKCPRMdMSwIgbc/uGuJi1tcYPoaYqT 9+TSll4dkrX8E/HDF+LScB5AUWw93ihuNbo6FPyJSNHxtHawnSArkU+f82+jKdXy 6V+qzOGhUNIe4Awm6F0s0bIfvfn1GYIIlpf64OCEvMGyEmSKwCLUyLxH28/fSTu+ 0L6lAN143/bOSyrRMUSwayF83x7bXsx9kvjF64F+U6w/1uemGTFfxvMtnN1SNNkx rPbkm1m3jpyOF1/HgKUjYDgv/Fa7ng== =lPNx -----END PGP SIGNATURE----- --Sig_/hKY9hptkzjpmOW3tPSym29u--