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 575C2C3DA7A for ; Mon, 2 Jan 2023 05:28:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230454AbjABF2k (ORCPT ); Mon, 2 Jan 2023 00:28:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47728 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230246AbjABF2h (ORCPT ); Mon, 2 Jan 2023 00:28:37 -0500 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 721D21161 for ; Sun, 1 Jan 2023 21:28:36 -0800 (PST) Received: by mail-io1-f69.google.com with SMTP id w18-20020a5d9cd2000000b006e32359d7fcso7404145iow.15 for ; Sun, 01 Jan 2023 21:28:36 -0800 (PST) X-Google-DKIM-Signature: v=1; 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charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: e4cf7c25bae5 Merge tag 'kbuild-fixes-v6.2' of git://git.ke.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=141a6274480000 kernel config: https://syzkaller.appspot.com/x/.config?x=68e0be42c8ee4bb4 dashboard link: https://syzkaller.appspot.com/bug?extid=aea1ad91e854d0a83e04 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10faef4c480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13170968480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0a2dc7ed8cf1/disk-e4cf7c25.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b35476d531fc/vmlinux-e4cf7c25.xz kernel image: https://storage.googleapis.com/syzbot-assets/a66192aa25a5/bzImage-e4cf7c25.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/78eabe0740c8/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+aea1ad91e854d0a83e04@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2941:16 index 1381 is out of range for type 's8 [1365]' CPU: 0 PID: 5067 Comm: syz-executor239 Not tainted 6.2.0-rc1-syzkaller-00095-ge4cf7c25bae5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xe0/0x110 lib/ubsan.c:282 dbFindLeaf+0x30a/0x440 fs/jfs/jfs_dmap.c:2941 dbAllocDmapLev+0xa9/0x420 fs/jfs/jfs_dmap.c:1952 dbAllocCtl+0x113/0x970 fs/jfs/jfs_dmap.c:1808 dbAllocAG+0x28b/0x1100 fs/jfs/jfs_dmap.c:1349 dbAlloc+0x661/0xc90 fs/jfs/jfs_dmap.c:873 dtSplitUp fs/jfs/jfs_dtree.c:974 [inline] dtInsert+0xc0e/0x6b80 fs/jfs/jfs_dtree.c:863 jfs_mkdir+0x757/0xb00 fs/jfs/namei.c:270 vfs_mkdir+0x3b3/0x590 fs/namei.c:4036 do_mkdirat+0x25b/0x530 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2ba532cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffd3c83968 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2ba532cb29 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00007f2ba52ec130 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2ba52ec1c0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ================================================================================