From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Date: Wed, 30 Sep 2020 05:39:22 -0700 Subject: [Cluster-devel] KASAN: slab-out-of-bounds Write in gfs2_fill_super Message-ID: <0000000000006903b205b0873061@google.com> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hello, syzbot found the following issue on: HEAD commit: fb0155a0 Merge tag 'nfs-for-5.9-3' of git://git.linux-nfs... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13458c0f900000 kernel config: https://syzkaller.appspot.com/x/.config?x=adebb40048274f92 dashboard link: https://syzkaller.appspot.com/bug?extid=af90d47a37376844e731 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15c307d3900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1353d58d900000 Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=106acbbb900000 final oops: https://syzkaller.appspot.com/x/report.txt?x=126acbbb900000 console output: https://syzkaller.appspot.com/x/log.txt?x=146acbbb900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+af90d47a37376844e731 at syzkaller.appspotmail.com gfs2: fsid=loop0: Trying to join cluster "lock_nolock", "loop0" gfs2: fsid=loop0: Now mounting FS... ================================================================== BUG: KASAN: slab-out-of-bounds in gfs2_read_sb fs/gfs2/ops_fstype.c:342 [inline] BUG: KASAN: slab-out-of-bounds in init_sb fs/gfs2/ops_fstype.c:479 [inline] BUG: KASAN: slab-out-of-bounds in gfs2_fill_super+0x1db5/0x3fe0 fs/gfs2/ops_fstype.c:1096 Write of size 8 at addr ffff88809073d548 by task syz-executor940/6853 CPU: 1 PID: 6853 Comm: syz-executor940 Not tainted 5.9.0-rc7-syzkaller #0 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+0x1d6/0x29e lib/dump_stack.c:118 print_address_description+0x66/0x620 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report+0x132/0x1d0 mm/kasan/report.c:530 gfs2_read_sb fs/gfs2/ops_fstype.c:342 [inline] init_sb fs/gfs2/ops_fstype.c:479 [inline] gfs2_fill_super+0x1db5/0x3fe0 fs/gfs2/ops_fstype.c:1096 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1342 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1201 vfs_get_tree+0x88/0x270 fs/super.c:1547 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x179d/0x29e0 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount+0x126/0x180 fs/namespace.c:3390 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446dba Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fff4c56e748 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fff4c56e7a0 RCX: 0000000000446dba RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff4c56e760 RBP: 00007fff4c56e760 R08: 00007fff4c56e7a0 R09: 00007fff00000015 R10: 0000000002200000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Allocated by task 6853: kasan_save_stack mm/kasan/common.c:48 [inline] kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc+0x100/0x130 mm/kasan/common.c:461 kmem_cache_alloc_trace+0x1e4/0x2e0 mm/slab.c:3554 kmalloc include/linux/slab.h:554 [inline] kzalloc include/linux/slab.h:666 [inline] init_sbd fs/gfs2/ops_fstype.c:77 [inline] gfs2_fill_super+0xb6/0x3fe0 fs/gfs2/ops_fstype.c:1018 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1342 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1201 vfs_get_tree+0x88/0x270 fs/super.c:1547 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x179d/0x29e0 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount+0x126/0x180 fs/namespace.c:3390 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88809073c000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 5448 bytes inside of 8192-byte region [ffff88809073c000, ffff88809073e000) The buggy address belongs to the page: page:00000000bd4b0b2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9073c head:00000000bd4b0b2d order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfffe0000010200(slab|head) raw: 00fffe0000010200 ffffea00028e5608 ffff8880aa441b50 ffff8880aa440a00 raw: 0000000000000000 ffff88809073c000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809073d400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88809073d480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88809073d500: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ^ ffff88809073d580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809073d600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report 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 at googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches 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=-9.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,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 C07E3C4727E for ; Wed, 30 Sep 2020 12:39:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6FC472071E for ; Wed, 30 Sep 2020 12:39:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729819AbgI3Mj3 (ORCPT ); Wed, 30 Sep 2020 08:39:29 -0400 Received: from mail-il1-f205.google.com ([209.85.166.205]:33764 "EHLO mail-il1-f205.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728042AbgI3Mj0 (ORCPT ); Wed, 30 Sep 2020 08:39:26 -0400 Received: by mail-il1-f205.google.com with SMTP id e73so1328328ill.0 for ; Wed, 30 Sep 2020 05:39:23 -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=HqnQ3NKXGLFPLSYTFlYXasihzCjgFi1eenNMqMb4n/0=; b=hfbHyCtdRp9J1Ov1/vzUfu+nnLEWJb5g75mG7RTL/F3bNHS93QDMlAQyf8kgvzkMG9 JfHct5marDslbzd2BDUgEOSZtBAHN/daklEh7LZbg1WTttk4MkTKh3Jk+4WhoKR87tVX WBmjmHIpeqiri3pTiHYEP13qcxWErpw7pK3G+ee1on+vjt/lMYcT8OhoYgNBzaKBT5Bt nc8n6NnLYMeAnbgRswcbJAP/YxjhqSgDX2WBUJ5Cos4jRZD2PRiL2YbUWyOgfXlZgCvW SzF5BV9IF+KGO1WVCGoEed6gNByx/dKgCt+Y5Yc1P5gUmv6ViQnl7JqQV3f1vgdFvpRp wn4A== X-Gm-Message-State: AOAM531Ldr6DduWKeFvFfIP5BILw2OQf6JLqMc9itp4ygHpPhzCTn0Xg lqmzZym3ty95N6XA2h4RrHLqXXxHS6aZmZT7NcLrmWmWYWeZ X-Google-Smtp-Source: ABdhPJz39cWzawSF9lPfOMXjQPdfXM2hfivrzVb8jS5oJnMfdk5/nkUiGd/Gx+va87Q17yS+GoJVbRm27C0sFoWXS/sVOpinxSeH MIME-Version: 1.0 X-Received: by 2002:a92:8912:: with SMTP id n18mr1935722ild.134.1601469562813; Wed, 30 Sep 2020 05:39:22 -0700 (PDT) Date: Wed, 30 Sep 2020 05:39:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006903b205b0873061@google.com> Subject: KASAN: slab-out-of-bounds Write in gfs2_fill_super From: syzbot To: agruenba@redhat.com, cluster-devel@redhat.com, linux-kernel@vger.kernel.org, rpeterso@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: fb0155a0 Merge tag 'nfs-for-5.9-3' of git://git.linux-nfs... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13458c0f900000 kernel config: https://syzkaller.appspot.com/x/.config?x=adebb40048274f92 dashboard link: https://syzkaller.appspot.com/bug?extid=af90d47a37376844e731 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15c307d3900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1353d58d900000 Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=106acbbb900000 final oops: https://syzkaller.appspot.com/x/report.txt?x=126acbbb900000 console output: https://syzkaller.appspot.com/x/log.txt?x=146acbbb900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+af90d47a37376844e731@syzkaller.appspotmail.com gfs2: fsid=loop0: Trying to join cluster "lock_nolock", "loop0" gfs2: fsid=loop0: Now mounting FS... ================================================================== BUG: KASAN: slab-out-of-bounds in gfs2_read_sb fs/gfs2/ops_fstype.c:342 [inline] BUG: KASAN: slab-out-of-bounds in init_sb fs/gfs2/ops_fstype.c:479 [inline] BUG: KASAN: slab-out-of-bounds in gfs2_fill_super+0x1db5/0x3fe0 fs/gfs2/ops_fstype.c:1096 Write of size 8 at addr ffff88809073d548 by task syz-executor940/6853 CPU: 1 PID: 6853 Comm: syz-executor940 Not tainted 5.9.0-rc7-syzkaller #0 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+0x1d6/0x29e lib/dump_stack.c:118 print_address_description+0x66/0x620 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report+0x132/0x1d0 mm/kasan/report.c:530 gfs2_read_sb fs/gfs2/ops_fstype.c:342 [inline] init_sb fs/gfs2/ops_fstype.c:479 [inline] gfs2_fill_super+0x1db5/0x3fe0 fs/gfs2/ops_fstype.c:1096 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1342 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1201 vfs_get_tree+0x88/0x270 fs/super.c:1547 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x179d/0x29e0 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount+0x126/0x180 fs/namespace.c:3390 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446dba Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fff4c56e748 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fff4c56e7a0 RCX: 0000000000446dba RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff4c56e760 RBP: 00007fff4c56e760 R08: 00007fff4c56e7a0 R09: 00007fff00000015 R10: 0000000002200000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Allocated by task 6853: kasan_save_stack mm/kasan/common.c:48 [inline] kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc+0x100/0x130 mm/kasan/common.c:461 kmem_cache_alloc_trace+0x1e4/0x2e0 mm/slab.c:3554 kmalloc include/linux/slab.h:554 [inline] kzalloc include/linux/slab.h:666 [inline] init_sbd fs/gfs2/ops_fstype.c:77 [inline] gfs2_fill_super+0xb6/0x3fe0 fs/gfs2/ops_fstype.c:1018 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1342 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1201 vfs_get_tree+0x88/0x270 fs/super.c:1547 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x179d/0x29e0 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount+0x126/0x180 fs/namespace.c:3390 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88809073c000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 5448 bytes inside of 8192-byte region [ffff88809073c000, ffff88809073e000) The buggy address belongs to the page: page:00000000bd4b0b2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9073c head:00000000bd4b0b2d order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfffe0000010200(slab|head) raw: 00fffe0000010200 ffffea00028e5608 ffff8880aa441b50 ffff8880aa440a00 raw: 0000000000000000 ffff88809073c000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809073d400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88809073d480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88809073d500: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ^ ffff88809073d580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88809073d600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches