From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3C06235C190 for ; Tue, 18 Nov 2025 14:35:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763476506; cv=none; b=k3Ty9MvFn0t9dSD5LTfHND6+MJenHQJFFT+9gsQDT+7Hlz+cgf5sstQUBQIhRjvKvHAtIatMV1kHFPFhIG8Ch8RI2J7QMvBL1wyS5w00SeDdr8rGuZ4RsgOAdrPZiAR4o5Dg1uy78PDImCoa1Oe2lC0oeM7eVWbgH7MotCZd0Rk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763476506; c=relaxed/simple; bh=QJuq+AJdr2uL8EFdx0cAsZ6EdLezfjHp/CVmbz5Gam8=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=E6Zeu964pEtGoHo/VIiYlfDWFeaf6exm0cXHpTlaF7H8mBl6wV164HOEBgUBYGyeFyheZNu/M8coH/s9sUvfSow2wEGym0GtfG7aaahA90olBYIQmP9GB3ODlDN9viR2RAIgOhikggaMjtjDfV4uY3tPQsompwtAePqXcyjc0HY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f198.google.com with SMTP id e9e14a558f8ab-433312ee468so51962275ab.1 for ; Tue, 18 Nov 2025 06:35:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763476503; x=1764081303; 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=pPsmbSTtn7DLNOo5Xl29rUKrW0NcX+RgEjfT9FJVbTo=; b=Isimsia9H8KqmXQDC+liPoc4L98Wlg7ZP76ujExrlryEl+k7O9nn7etoV8atzWmxOh kH+JKDRDlRKcFJtBoJt+7+28uDzKjZXaLROvstQP2ay09iCt0l+CzeUEGqlTK37I9beG j/rijvZjLWALHh7hIR9ZJeXgIOo/5amsbKeOy3lKY8nGS1yBHOu6ZPkN4VXFJeoYlzPQ bpLH6cEMMMfBQSC8P54VxAnXyF7VhBqaFSdl9XtPrYNJdJdm7cRNOEj1mx6yBzNHxOw1 WWgxeR7kbakYf6qWED5IoikYxnYFm5uwVlklzF6OfFSqfLX///5J8fjYdT2HszOx/Gt7 tfZQ== X-Gm-Message-State: AOJu0YyG3x76HuGnz8nhK7spxZwqakoVjLEcHUOemq0F4M3yGgymyyrk 7dqYr+m11hTH3tWOE2rzysIoQ8f2jxvxkJ4DU7ZeVJ3K7amNv81gWFR7PmKhnvR9CohwIkfd3Jc 1n6l7brhoNdseourqvUX0EWG8wHxEXlkdkSRu2QA8E/bP70cEi22qHwRVkM4= X-Google-Smtp-Source: AGHT+IEgN7SO1A7gdj7gdutda7GR0fT0AM1HcL8luFOjB1GRBpR8zHJUsyDsAWUNgDO1uNKABVS6rzA03zyYexOwAwjsFq+q+qFN Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:190d:b0:434:96ea:ca19 with SMTP id e9e14a558f8ab-43592e20b70mr31456715ab.17.1763476503380; Tue, 18 Nov 2025 06:35:03 -0800 (PST) Date: Tue, 18 Nov 2025 06:35:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <691c8417.a70a0220.3124cb.00ca.GAE@google.com> Subject: Re: [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in dtInsertEntry From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, yun.zhou@windriver.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-out-of-bounds Read in dtSplitPage read_mapping_page failed! ERROR: (device loop0): txCommit: read_mapping_page failed! ERROR: (device loop0): txCommit: ================================================================== BUG: KASAN: slab-out-of-bounds in dtSplitPage+0x121b/0x38c0 fs/jfs/jfs_dtree.c:-1 Read of size 1 at addr ffff888060f891dd by task syz.0.16/6471 CPU: 0 UID: 0 PID: 6471 Comm: syz.0.16 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 dtSplitPage+0x121b/0x38c0 fs/jfs/jfs_dtree.c:-1 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0x100c/0x5d10 fs/jfs/jfs_dtree.c:871 jfs_mkdir+0x6ec/0xa70 fs/jfs/namei.c:270 vfs_mkdir+0x306/0x510 fs/namei.c:4453 do_mkdirat+0x247/0x590 fs/namei.c:4486 __do_sys_mkdirat fs/namei.c:4503 [inline] __se_sys_mkdirat fs/namei.c:4501 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4501 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8cecf8d1d7 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8cede76e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f8cede76ef0 RCX: 00007f8cecf8d1d7 RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c RBP: 0000200000000140 R08: 00002000000000c0 R09: 0000000000000000 R10: 0000200000000140 R11: 0000000000000246 R12: 0000200000000040 R13: 00007f8cede76eb0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 6471: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4978 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_lru_noprof+0x35d/0x6d0 mm/slub.c:5307 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x6a/0x1b0 fs/inode.c:346 iget_locked+0x106/0x580 fs/inode.c:1445 jfs_iget+0x24/0x470 fs/jfs/inode.c:29 jfs_lookup+0x1c5/0x380 fs/jfs/namei.c:1469 __lookup_slow+0x297/0x3d0 fs/namei.c:1816 lookup_slow+0x53/0x70 fs/namei.c:1833 walk_component+0x2d2/0x400 fs/namei.c:2151 lookup_last fs/namei.c:2652 [inline] path_lookupat+0x163/0x430 fs/namei.c:2676 filename_lookup+0x212/0x570 fs/namei.c:2705 user_path_at+0x3a/0x60 fs/namei.c:3215 __do_sys_chdir fs/open.c:561 [inline] __se_sys_chdir+0x91/0x280 fs/open.c:555 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888060f88928 which belongs to the cache jfs_ip of size 2216 The buggy address is located 13 bytes to the right of allocated 2216-byte region [ffff888060f88928, ffff888060f891d0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x60f88 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888077ec2e01 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801e397280 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888077ec2e01 head: 00fff00000000040 ffff88801e397280 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888077ec2e01 head: 00fff00000000003 ffffea000183e201 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6471, tgid 6470 (syz.0.16), ts 129317552975, free_ts 22248192864 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2356/0x2430 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3059 [inline] allocate_slab+0x96/0x350 mm/slub.c:3232 new_slab mm/slub.c:3286 [inline] ___slab_alloc+0xf56/0x1990 mm/slub.c:4655 __slab_alloc+0x65/0x100 mm/slub.c:4778 __slab_alloc_node mm/slub.c:4854 [inline] slab_alloc_node mm/slub.c:5276 [inline] kmem_cache_alloc_lru_noprof+0x3ef/0x6d0 mm/slub.c:5307 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x6a/0x1b0 fs/inode.c:346 iget_locked+0x106/0x580 fs/inode.c:1445 jfs_iget+0x24/0x470 fs/jfs/inode.c:29 jfs_fill_super+0x8ad/0xd80 fs/jfs/super.c:547 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1698 vfs_get_tree+0x92/0x2b0 fs/super.c:1758 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3642 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3718 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xbb1/0xd20 mm/page_alloc.c:2906 __free_pages mm/page_alloc.c:5302 [inline] free_contig_range+0x1bd/0x4a0 mm/page_alloc.c:7146 destroy_args+0x69/0x660 mm/debug_vm_pgtable.c:958 debug_vm_pgtable+0x39f/0x3b0 mm/debug_vm_pgtable.c:1345 do_one_initcall+0x236/0x820 init/main.c:1283 do_initcall_level+0x104/0x190 init/main.c:1345 do_initcalls+0x59/0xa0 init/main.c:1361 kernel_init_freeable+0x334/0x4b0 init/main.c:1593 kernel_init+0x1d/0x1d0 init/main.c:1483 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888060f89080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888060f89100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888060f89180: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ^ ffff888060f89200: fc fc fc fc fc fc fc fc fc fc 00 00 00 00 00 00 ffff888060f89280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Tested on: commit: e7c375b1 Merge tag 'vfs-6.18-rc7.fixes' of gitolite.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10ca3914580000 kernel config: https://syzkaller.appspot.com/x/.config?x=38deb25bbc2fa41e dashboard link: https://syzkaller.appspot.com/bug?extid=5f7f0caf9979e9d09ff8 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=110df212580000