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_PASS,URIBL_BLOCKED autolearn=ham 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 0FB50ECDFB1 for ; Mon, 16 Jul 2018 03:09:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B3B322086B for ; Mon, 16 Jul 2018 03:09:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3B322086B 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=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727469AbeGPDeQ (ORCPT ); Sun, 15 Jul 2018 23:34:16 -0400 Received: from mail-io0-f199.google.com ([209.85.223.199]:34267 "EHLO mail-io0-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727184AbeGPDeP (ORCPT ); Sun, 15 Jul 2018 23:34:15 -0400 Received: by mail-io0-f199.google.com with SMTP id f9-v6so3820671ioh.1 for ; Sun, 15 Jul 2018 20:09:02 -0700 (PDT) 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=VQDft/MFek4HGfQwj3aPVgccku64xjpUP9X4lWrmCzk=; b=oXoT4MBABoZ21f7LPXi7BFBEVTm7N7YTIVaZp4jXj0injlgE17BuGDolk48ZbiHFk+ Z+EyWmeJhe8TK3gC0Sdndm7kbYVu7KOXikIzG8ENH3TGdz7Pa0f9SgMgKoA+c/JYOelF 7RSWEIdIdYkHQIbmOct2Y4QVX1YONd/lfEhudkQlqpe6kM7d0lHmWauN8pKd7svdGOla RsCOc2uoO+zvGDalSZzZ9rQtdbXMN+FZZ0ONuPbnAaUC7XGveOXyfV2TwaMq95v4EBMi fVMJIrvEaPY6xvCAWiXhsXZjKStWPW6dYvk/9X/kSK0kGEDcCQ6COf0BsMgJe5MvixKE pEPw== X-Gm-Message-State: AOUpUlHkb+agfH3ypCWEz4v3+ImcYBdicw+Iu08agwWsj3bOSyzU3of2 tHcPovnr/hTcuYpit6xcjH2xyS4/fZ/hGX35hqyrLHMumU75 X-Google-Smtp-Source: AAOMgpcnX755aWzzEP1gDpedi6svO0hSYUCTKp5eSMJD7rtX1jLVhNUh3xoZv/AZyqbWF2iRhxXJzYUGkpPQGYkt6gfoqNXevbCU MIME-Version: 1.0 X-Received: by 2002:a6b:4e0b:: with SMTP id c11-v6mr6413802iob.22.1531710542342; Sun, 15 Jul 2018 20:09:02 -0700 (PDT) Date: Sun, 15 Jul 2018 20:09:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c678690571152620@google.com> Subject: WARNING: kmalloc bug in krealloc From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 483d835c8189 Add linux-next specific files for 20180713 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13689bb2400000 kernel config: https://syzkaller.appspot.com/x/.config?x=60e5ac2478928314 dashboard link: https://syzkaller.appspot.com/bug?extid=8574471d8734457d98aa compiler: gcc (GCC) 8.0.1 20180413 (experimental) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=17babf0c400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1285cf94400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+8574471d8734457d98aa@syzkaller.appspotmail.com random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) WARNING: CPU: 0 PID: 4406 at mm/slab_common.c:1031 kmalloc_slab+0x56/0x70 mm/slab_common.c:1031 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4406 Comm: syz-executor177 Not tainted 4.18.0-rc4-next-20180713+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 panic+0x238/0x4e7 kernel/panic.c:184 __warn.cold.8+0x163/0x1ba kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:996 RIP: 0010:kmalloc_slab+0x56/0x70 mm/slab_common.c:1031 Code: c5 c0 1a d1 88 5d c3 b8 10 00 00 00 48 85 ff 74 f4 83 ef 01 c1 ef 03 0f b6 87 e0 19 d1 88 eb d8 31 c0 81 e6 00 02 00 00 75 db <0f> 0b 5d c3 48 8b 04 c5 00 1a d1 88 5d c3 66 90 66 2e 0f 1f 84 00 RSP: 0018:ffff8801af0ef830 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81d098cd RDX: ffffffff81d09964 RSI: 0000000000000000 RDI: 0000000000550001 RBP: ffff8801af0ef830 R08: ffff8801b640c6c0 R09: fffffbfff12569a0 R10: fffffbfff12569a0 R11: ffffffff892b4d03 R12: 0000000000550001 R13: 0000000000600040 R14: ffff8801af0ef998 R15: 0000000000600040 __do_kmalloc mm/slab.c:3713 [inline] __kmalloc_track_caller+0x21/0x760 mm/slab.c:3733 __do_krealloc mm/slab_common.c:1468 [inline] krealloc+0x65/0xb0 mm/slab_common.c:1515 vfs_getxattr_alloc+0x274/0x3c0 fs/xattr.c:288 cap_inode_getsecurity+0x104/0x820 security/commoncap.c:396 security_inode_getsecurity+0xe1/0x130 security/security.c:866 xattr_getsecurity fs/xattr.c:243 [inline] vfs_getxattr+0x1db/0x390 fs/xattr.c:331 getxattr+0x139/0x2c0 fs/xattr.c:537 path_getxattr+0x103/0x1b0 fs/xattr.c:565 __do_sys_getxattr fs/xattr.c:577 [inline] __se_sys_getxattr fs/xattr.c:574 [inline] __x64_sys_getxattr+0x9d/0x100 fs/xattr.c:574 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440639 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdc307f058 EFLAGS: 00000217 ORIG_RAX: 00000000000000bf RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440639 RDX: 00000000200002c0 RSI: 0000000020000500 RDI: 00000000200004c0 RBP: 64663d736e617274 R08: 00007ffdc307f1d8 R09: 00007ffdc307f1d8 R10: 0000000000000143 R11: 0000000000000217 R12: 0000000000401ec0 R13: 0000000000401f50 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. 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