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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id E438EC433F5 for ; Wed, 13 Apr 2022 11:01:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 49ECD6B0072; Wed, 13 Apr 2022 07:01:49 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 426636B0073; Wed, 13 Apr 2022 07:01:49 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2A3FD6B0074; Wed, 13 Apr 2022 07:01:49 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.a.hostedemail.com [64.99.140.24]) by kanga.kvack.org (Postfix) with ESMTP id 148D36B0072 for ; Wed, 13 Apr 2022 07:01:49 -0400 (EDT) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id D54D325489 for ; Wed, 13 Apr 2022 11:01:48 +0000 (UTC) X-FDA: 79351565496.20.A61814E Received: from mail-yb1-f181.google.com (mail-yb1-f181.google.com [209.85.219.181]) by imf25.hostedemail.com (Postfix) with ESMTP id 5173BA0009 for ; Wed, 13 Apr 2022 11:01:48 +0000 (UTC) Received: by mail-yb1-f181.google.com with SMTP id g34so3057264ybj.1 for ; Wed, 13 Apr 2022 04:01:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=lF5kt5jFogC6S7qxY754bNyuIo0w6PuBdFUJzlNflk4=; b=VXDVh+fDKwC3uuGO9jw6LeAEzVTJ9MafgNOZRbkW9CZlqFoRj9FEyK2UJkA9MElSmc Woz4x4sSi+ltgAYC+kwXOxbjkcCSqcZL2GlzwQtsyYm+HfclIKzi25tE1zIqQw+HDJlt yMCtSbEn4J9nTfww2cndozhkZahgRuKBMB766mqVzsHjcKoJeT4zbihbYDcyDQ06Vyqm ytLpL6yR5M3guyJ7J9BqvzlaIOCoVuvr255iHNYuylTKNWobJlsNSpUoQV1rrw66FAKT 77FMMsKfedKFVD+onp1GnNWpShSGIPe+zVxO6xZWy8E+JY34YNUvZQFpPMfWGoWI6Lxj nfIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=lF5kt5jFogC6S7qxY754bNyuIo0w6PuBdFUJzlNflk4=; b=MTE/1qfhoFlb6jcI4lZZBZ6UtdxIrVx6EJ3HmGjYf2Kj1gQyPfb3zBNDtPaCn46vZ5 NjkD7O3ZT8GoYPE4xHSRBIi2c5HhZBESm0CGSb2YMphvJ0CmECLquMWIVmE9sYV8zRA6 in9iGNcxZVICp7myDymSjDhkYk5HgMthlbcpMMEtv7qU7E2C30flhkndsKbBXfoHaAI/ XEEcmc0IjFS91Col/J7TaDhCtAFGlY22EfGHFsyAI/qAe3X4fwnfTqZGupSEivrQpLP3 b73nlFVK/Z7yjnExgdl24mgCFmeL58CtACf+7lDm21EWAC07app7rNye3J1xk7cmIDX1 68xQ== X-Gm-Message-State: AOAM532VHSHtDWebWTA+WbpPvYXPD35Qx80knJX28JOnwANTGH3mmkUx bJroHUJ6eXcAOvBID9yezCgl1jqzygRdO/t96KDCig== X-Google-Smtp-Source: ABdhPJx5whFXRNAmWiXTP4UVIi2kA1uqH5a5ihQWwBju6TkDBb7M6GgWXZ63y9AJ223kOYdVdHnWZIt7tmJEmA9fZtA= X-Received: by 2002:a25:c094:0:b0:641:10e0:cfd8 with SMTP id c142-20020a25c094000000b0064110e0cfd8mr15800637ybf.88.1649847707317; Wed, 13 Apr 2022 04:01:47 -0700 (PDT) MIME-Version: 1.0 References: <20220412140356.c0b382fe097cbf4fd040afcc@linux-foundation.org> In-Reply-To: <20220412140356.c0b382fe097cbf4fd040afcc@linux-foundation.org> From: Naresh Kamboju Date: Wed, 13 Apr 2022 16:31:36 +0530 Message-ID: Subject: Re: [next] next-20220412: BUG: Bad page map in process oom_reaper pte To: Andrew Morton , Mike Rapoport Cc: Linux-Next Mailing List , open list , lkft-triage@lists.linaro.org, LTP List , Stephen Rothwell , linux-mm , Anders Roxell Content-Type: text/plain; charset="UTF-8" X-Rspam-User: Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=linaro.org header.s=google header.b=VXDVh+fD; spf=pass (imf25.hostedemail.com: domain of naresh.kamboju@linaro.org designates 209.85.219.181 as permitted sender) smtp.mailfrom=naresh.kamboju@linaro.org; dmarc=pass (policy=none) header.from=linaro.org X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 5173BA0009 X-Stat-Signature: 8mozap5gwcncb5teo8r4ny6khj3jnaai X-HE-Tag: 1649847708-868838 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi Andrew and Mike, On Wed, 13 Apr 2022 at 02:34, Andrew Morton wrote: > > On Tue, 12 Apr 2022 17:56:42 +0530 Naresh Kamboju wrote: > > > Linux next-20220412 i386 LTP mm test case caused following kernel crash > > however, test runs to complete successfully. > > [ 952.018368] BUG: Bad page map in process oom_reaper pte:06e7703e > > pmd:0583f067 > > > > > > Reported-by: Linux Kernel Functional Testing > > I wonder if this could be 859a85ddf90e714092de again. But the timing > seems wrong. > > It seems repeatable. Is it possible to run a bisection search please? Thanks for looking into this issue. Allow us sometime I will schedule this bisection and get back to you with my findings soon. By running LTP CVE test case "ioctl_sg01" we are able to reproduce this problem [1] on qemu_i386. - Naresh [1] https://lkft.validation.linaro.org/scheduler/job/4876493#L29410 -- Crash log: tst_test.c:1433: TINFO: Timeout per run is 0h 05m 00s ioctl_sg01.c:81: TINFO: Found SCSI device /dev/sg1 [ 1135.167555] __swap_info_get: Bad swap file entry 6c009400 [ 1135.168577] BUG: Bad page map in process ioctl_sg01 pte:0128003e pmd:06bfb067 [ 1135.169694] addr:289e2000 vm_flags:00100073 anon_vma:c2e29b28 mapping:00000000 index:289e2 [ 1135.171357] file:(null) fault:0x0 mmap:0x0 readpage:0x0 [ 1135.172381] CPU: 2 PID: 31128 Comm: ioctl_sg01 Tainted: G W 5.18.0-rc1-next-20220411 #1 [ 1135.173914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 1135.175263] Call Trace: [ 1135.175662] dump_stack_lvl+0x44/0x57 [ 1135.176274] dump_stack+0xd/0x10 [ 1135.176785] print_bad_pte.cold+0x82/0xd9 [ 1135.177407] ? free_swap_and_cache+0x2e/0xe0 [ 1135.178138] unmap_page_range+0x6b5/0x790 [ 1135.178833] unmap_single_vma+0x6c/0xd0 [ 1135.179448] unmap_vmas+0x71/0xe0 [ 1135.179997] unmap_region+0x88/0xf0 [ 1135.180587] __do_munmap+0x184/0x3f0 [ 1135.181162] __vm_munmap+0x71/0x120 [ 1135.181750] __ia32_sys_munmap+0x17/0x20 [ 1135.182358] __do_fast_syscall_32+0x4c/0xc0 [ 1135.183086] do_fast_syscall_32+0x32/0x70 [ 1135.183746] do_SYSENTER_32+0x15/0x20 [ 1135.184317] entry_SYSENTER_32+0x98/0xf1 [ 1135.184960] EIP: 0xb7f01549 [ 1135.185407] Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76 [ 1135.188401] EAX: ffffffda EBX: 27d23000 ECX: 01000000 EDX: 27d23000 [ 1135.189405] ESI: 01000000 EDI: 000000a0 EBP: 09db9520 ESP: bfe3630c [ 1135.190402] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296 [ 1135.191558] Disabling lock debugging due to kernel taint [ 1135.192604] __swap_info_get: Bad swap file entry 6c009401 [ 1135.193685] BUG: Bad page map in process ioctl_sg01 pte:0128023e pmd:06bfb067 [ 1135.195104] addr:289e3000 vm_flags:00100073 anon_vma:c2e29b28 mapping:00000000 index:289e3 [ 1135.196640] file:(null) fault:0x0 mmap:0x0 readpage:0x0 [ 1135.197489] CPU: 2 PID: 31128 Comm: ioctl_sg01 Tainted: G B W 5.18.0-rc1-next-20220411 #1