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 1319CC433FE for ; Tue, 11 Oct 2022 00:00:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229451AbiJKAAu (ORCPT ); Mon, 10 Oct 2022 20:00:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229778AbiJKAAl (ORCPT ); Mon, 10 Oct 2022 20:00:41 -0400 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DEEA67268C for ; Mon, 10 Oct 2022 17:00:40 -0700 (PDT) Received: by mail-io1-f72.google.com with SMTP id h2-20020a056602154200b006bb5f8574afso8233509iow.13 for ; Mon, 10 Oct 2022 17:00:40 -0700 (PDT) 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: 4899a36f91a9 Merge tag 'powerpc-6.1-1' of git://git.kernel.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=12ead462880000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2021a61197ebe02 dashboard link: https://syzkaller.appspot.com/bug?extid=7edb85bc97be9f350d90 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1404403a880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10789852880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1a98722ff83f/disk-4899a36f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7a31d6690395/vmlinux-4899a36f.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/6fb347a504fa/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7edb85bc97be9f350d90@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:1671:12 shift exponent 1834973817 is too large for 64-bit type 'long long int' CPU: 0 PID: 3603 Comm: syz-executor644 Not tainted 6.0.0-syzkaller-09413-g4899a36f91a9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 ubsan_epilogue+0xb/0x50 lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x187 lib/ubsan.c:322 dbFindCtl.cold+0x52/0x57 fs/jfs/jfs_dmap.c:1671 dbAllocAny+0xa4/0x1a0 fs/jfs/jfs_dmap.c:1502 dbAlloc+0x46d/0xa70 fs/jfs/jfs_dmap.c:859 diNewExt+0x724/0x1a10 fs/jfs/jfs_imap.c:2251 diAllocExt fs/jfs/jfs_imap.c:1945 [inline] diAllocAG+0x15f1/0x2200 fs/jfs/jfs_imap.c:1662 diAlloc+0x82d/0x1730 fs/jfs/jfs_imap.c:1583 ialloc+0x89/0xaa0 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x1f0/0xab0 fs/jfs/namei.c:225 vfs_mkdir+0x489/0x740 fs/namei.c:4013 do_mkdirat+0x28c/0x310 fs/namei.c:4038 __do_sys_mkdir fs/namei.c:4058 [inline] __se_sys_mkdir fs/namei.c:4056 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4056 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc402fc5c29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc056f56d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc402fc5c29 RDX: 00007fc402f84123 RSI: 0000000000000000 RDI: 00000000200052c0 RBP: 00007fc402f853f0 R08: 0000555555d8a2c0 R09: 0000000000000000 R10: 00007ffc056f55a0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00080000000000f4 R15: 0000000000000000 ================================================================================