From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: BUG: unable to handle kernel paging request in ion_heap_clear_pages Date: Fri, 29 Nov 2019 23:59:06 -0800 Message-ID: <00000000000080f1d305988bb8ba@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Return-path: Sender: linux-kernel-owner@vger.kernel.org To: arve@android.com, christian@brauner.io, devel@driverdev.osuosl.org, dri-devel@lists.freedesktop.org, gregkh@linuxfoundation.org, joel@joelfernandes.org, labbott@redhat.com, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, maco@android.com, sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com, tkjos@android.com List-Id: dri-devel@lists.freedesktop.org Hello, syzbot found the following crash on: HEAD commit: 419593da Add linux-next specific files for 20191129 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12bfd882e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=7c04b0959e75c206 dashboard link: https://syzkaller.appspot.com/bug?extid=be6ccf3081ce8afd1b56 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+be6ccf3081ce8afd1b56@syzkaller.appspotmail.com BUG: unable to handle page fault for address: fffff52002e00000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 21ffee067 P4D 21ffee067 PUD aa11c067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3644 Comm: ion_system_heap Not tainted 5.4.0-next-20191129-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memory_is_nonzero mm/kasan/generic.c:121 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline] RIP: 0010:check_memory_region+0x9c/0x1a0 mm/kasan/generic.c:192 Code: c9 4d 0f 49 c1 49 c1 f8 03 45 85 c0 0f 84 10 01 00 00 41 83 e8 01 4e 8d 44 c0 08 eb 0d 48 83 c0 08 4c 39 c0 0f 84 a7 00 00 00 <48> 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 53 80 RSP: 0018:ffffc9000c9f7ab8 EFLAGS: 00010212 RAX: fffff52002e00000 RBX: fffff52002e01600 RCX: ffffffff85d5c229 RDX: 0000000000000001 RSI: 000000000000b000 RDI: ffffc90017000000 RBP: ffffc9000c9f7ad0 R08: fffff52002e01600 R09: 0000000000001600 R10: fffff52002e015ff R11: ffffc9001700afff R12: fffff52002e00000 R13: 000000000000b000 R14: 0000000000000000 R15: ffffc9000c9f7d08 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52002e00000 CR3: 00000000778bd000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memset+0x24/0x40 mm/kasan/common.c:107 memset include/linux/string.h:410 [inline] ion_heap_clear_pages+0x49/0x70 drivers/staging/android/ion/ion_heap.c:106 ion_heap_sglist_zero+0x245/0x270 drivers/staging/android/ion/ion_heap.c:130 ion_heap_buffer_zero+0xf5/0x150 drivers/staging/android/ion/ion_heap.c:145 ion_system_heap_free+0x1eb/0x250 drivers/staging/android/ion/ion_system_heap.c:163 ion_buffer_destroy+0x159/0x2d0 drivers/staging/android/ion/ion.c:93 ion_heap_deferred_free+0x29d/0x630 drivers/staging/android/ion/ion_heap.c:239 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: CR2: fffff52002e00000 ---[ end trace ee5c63907f1d6f00 ]--- RIP: 0010:memory_is_nonzero mm/kasan/generic.c:121 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline] RIP: 0010:check_memory_region+0x9c/0x1a0 mm/kasan/generic.c:192 Code: c9 4d 0f 49 c1 49 c1 f8 03 45 85 c0 0f 84 10 01 00 00 41 83 e8 01 4e 8d 44 c0 08 eb 0d 48 83 c0 08 4c 39 c0 0f 84 a7 00 00 00 <48> 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 53 80 RSP: 0018:ffffc9000c9f7ab8 EFLAGS: 00010212 RAX: fffff52002e00000 RBX: fffff52002e01600 RCX: ffffffff85d5c229 RDX: 0000000000000001 RSI: 000000000000b000 RDI: ffffc90017000000 RBP: ffffc9000c9f7ad0 R08: fffff52002e01600 R09: 0000000000001600 R10: fffff52002e015ff R11: ffffc9001700afff R12: fffff52002e00000 R13: 000000000000b000 R14: 0000000000000000 R15: ffffc9000c9f7d08 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52002e00000 CR3: 00000000778bd000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. 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 X-Spam-Level: X-Spam-Status: No, score=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 895F7C432C0 for ; Sat, 30 Nov 2019 13:24:46 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 64E1F2073C for ; Sat, 30 Nov 2019 13:24:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 64E1F2073C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E1E076E11D; Sat, 30 Nov 2019 13:24:37 +0000 (UTC) Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by gabe.freedesktop.org (Postfix) with ESMTPS id A66286E987 for ; Sat, 30 Nov 2019 07:59:07 +0000 (UTC) Received: by mail-il1-f199.google.com with SMTP id k9so188420ili.8 for ; Fri, 29 Nov 2019 23:59:07 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=OEwP3juOQOIj8SZQEkYShHXCOKBgtNHHcB5lfQay514=; b=StMQaWsUdDzveENCTJArdIcCGW7zP5H20Gm1qhTYtPmK3vat8LGJ9W+X2r2+n6AVXF G5HKkC7tWu2EfMj1Dle39eXr2pFKL3iLkEopkY1A5ylX90EJyed1ZCNQlRvhm7mRTAYD jvvhrk6WityGTRrWlazPdEqCdMDeQMUwPSRtMGnY/KxlwF6MZpGHIVS4y19MVyrUYHzX 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linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, maco@android.com, sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com, tkjos@android.com X-Mailman-Approved-At: Sat, 30 Nov 2019 13:23:59 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed"; DelSp="yes" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Message-ID: <20191130075906.DsCSZCttdYtGazhnQERMDRh_8-n2BeQ_WBFhoDK6jII@z> SGVsbG8sCgpzeXpib3QgZm91bmQgdGhlIGZvbGxvd2luZyBjcmFzaCBvbjoKCkhFQUQgY29tbWl0 OiAgICA0MTk1OTNkYSBBZGQgbGludXgtbmV4dCBzcGVjaWZpYyBmaWxlcyBmb3IgMjAxOTExMjkK Z2l0IHRyZWU6ICAgICAgIGxpbnV4LW5leHQKY29uc29sZSBvdXRwdXQ6IGh0dHBzOi8vc3l6a2Fs bGVyLmFwcHNwb3QuY29tL3gvbG9nLnR4dD94PTEyYmZkODgyZTAwMDAwCmtlcm5lbCBjb25maWc6 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