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 AFBABC4321E for ; Sat, 26 Nov 2022 17:09:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229752AbiKZRJe (ORCPT ); Sat, 26 Nov 2022 12:09:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229469AbiKZRJc (ORCPT ); Sat, 26 Nov 2022 12:09:32 -0500 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A8A119021 for ; Sat, 26 Nov 2022 09:09:31 -0800 (PST) Received: by mail-il1-f199.google.com with SMTP id y12-20020a056e021bec00b00302a7d5bc83so5002343ilv.16 for ; Sat, 26 Nov 2022 09:09:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=dK39n2LHUM6dTNpUPIXAiJVmWXxSWQm6JqTRK4z2qZE=; b=gh4hLIeanCc3A5pg2ugSfeIxl2cbzxIDXqTrIdVmgvZUG1DKm4r84L+dIAyhk3EekI nFCk4FGo1bLNlDahmmVb/HT6kzzJZPYDVayonNzwIfBjAAcAqMTnuoeGxVujkHeDUdP/ VZ9zbvux+b3i94wNza/kDQLieAIYPUhehzLZX95vrxwqvpKUjRh5MgWdZgYR1IvAubGk oOk6h820qAh73+K1zkhLFnseoQMvXV2PyKyuMmbFzHvtLgDdlpikFZnsUriw43ifS5CY pO+9B8IXIbYDa9NTgr/TDqjL3oYqkvmJrCefA234nGg6102x+naAnGeRvWkfppBgmhHM uEQQ== X-Gm-Message-State: ANoB5pm9x8DABW3TLGx01vDDfQpE0PWu9rkwdZA0er2Cqx3Xmu9K03CS bfXAlE8xzoW93H3xAxB/KnzP99OXMvAF9bChv4ThWOGE3yS1 X-Google-Smtp-Source: AA0mqf77h2cF/n4XILxIVVJgReGwedw+0fs1zOPsxdArt26KD+kmV/nKUdCprfZZLzIQV73E+kUwWr2uXto4pD4rov36jHvqC8PY MIME-Version: 1.0 X-Received: by 2002:a92:ca8d:0:b0:302:de10:7ae1 with SMTP id t13-20020a92ca8d000000b00302de107ae1mr8923641ilo.15.1669482570940; Sat, 26 Nov 2022 09:09:30 -0800 (PST) Date: Sat, 26 Nov 2022 09:09:30 -0800 In-Reply-To: <000000000000f841fb05eb364ce6@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000999ad405ee62b30b@google.com> Subject: Re: [syzbot] UBSAN: array-index-out-of-bounds in txCommit From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; 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: 644e9524388a Merge tag 'for-v6.1-rc' of git://git.kernel.o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=16788381880000 kernel config: https://syzkaller.appspot.com/x/.config?x=8d01b6e3197974dd dashboard link: https://syzkaller.appspot.com/bug?extid=0558d19c373e44da3c18 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=13591573880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10c2c7ab880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0968428e17b4/disk-644e9524.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fd4c3bfd0777/vmlinux-644e9524.xz kernel image: https://storage.googleapis.com/syzbot-assets/ee4571f27f1c/bzImage-644e9524.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/0fdce98f569c/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0558d19c373e44da3c18@syzkaller.appspotmail.com ================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_txnmgr.c:1738:5 index 18 is out of range for type 'xad_t [18]' CPU: 1 PID: 3636 Comm: syz-executor352 Not tainted 6.1.0-rc6-syzkaller-00308-g644e9524388a #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+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 xtLog fs/jfs/jfs_txnmgr.c:1738 [inline] txLog fs/jfs/jfs_txnmgr.c:1391 [inline] txCommit+0x3fb5/0x6d40 fs/jfs/jfs_txnmgr.c:1259 jfs_commit_inode+0x342/0x5a0 fs/jfs/inode.c:108 extAlloc+0xc93/0xff0 fs/jfs/jfs_extent.c:172 jfs_get_block+0x342/0xce0 fs/jfs/inode.c:248 __block_write_begin_int+0x54c/0x1a80 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x93/0x1e0 fs/buffer.c:2102 jfs_write_begin+0x2d/0x60 fs/jfs/inode.c:304 generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3753 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3881 generic_file_write_iter+0xab/0x310 mm/filemap.c:3913 do_iter_write+0x6c2/0xc20 fs/read_write.c:861 iter_file_splice_write+0x7fc/0xfc0 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0xe6/0x1c0 fs/splice.c:931 splice_direct_to_actor+0x4e4/0xc00 fs/splice.c:886 do_splice_direct+0x279/0x3d0 fs/splice.c:974 do_sendfile+0x5fb/0xf80 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x14f/0x1b0 fs/read_write.c:1309 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: 0033:0x7f12751c65e9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f12751512f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f12752517f0 RCX: 00007f12751c65e9 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 RBP: 00007f127521e0e4 R08: 0000000000000000 R09: 0000000000000000 R10: 000080001d00c0d0 R11: 0000000000000246 R12: 65732f636f72702f R13: 0030656c69662f2e R14: 0031656c69662f2e R15: 00007f12752517f8 ================================================================================