From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 542606F2FD for ; Thu, 12 Sep 2024 09:21:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726132893; cv=none; b=Rv8HNKeRshxX4AFczGJoZwtyMonW8SUpeo9kSLr37nzyH5DzGt8Rk/u4CFs3Nuc543omjAy7PRUnOYR633DcCEj/YvC+6WOSTVxLHtyeWuNuyORY3XcN82XGaHUSR8/RJ3YZNJDfBfv0g8/QTtVuKSG3xybhO1W+mAAnnQtsQTM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726132893; c=relaxed/simple; bh=akTf7ryabJi+EOydiuI+e0lC9qa+g4OTwka/3VUu8/A=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ZX+2UtI7eT2a35qaE2jMQb8fdnZ4Z9yTtF4NReINXp3GzT+StnlHjsY6M4P/U5nHJEwWXu+kVXO/IzoJ6IN34Q5fASVLIKxj/aOEoyy3uEahbnolU3wK65JWwgAurXpaso/evaLXdR8ei1BTn2i8wXSRNLgmPl2CqrU4NYI8jGo= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-3a04eef8ed2so12305955ab.1 for ; Thu, 12 Sep 2024 02:21:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726132890; x=1726737690; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=O6TnpEc7v/Mea0Akm2u/BbGpFqmBFrKFb2fGYInzlJY=; b=vfKoTtBI4z7FrPNmlrgo0S75plj5S/03//eyorH2jYTdc3iqnI6zgpTDiM/khvHI+4 O0rrGt70HZ5mFzvv2oFJu1manuK4RE69x5yuPbPvdAwJ+BfsAlMwVrjnxbXIt+JBkpMO VVoT0NHh4rQqrujOMNrL/TwN5cwkWPBtebLFpfb/Si6oU599dcPUmJ1lusGethQFotmy kvKN9suk3mwWW/pOTyuo9btsp6oKhIKRWv78fJg8OIw7RIgVEhVJkKIngWDBD+qpXL0l wwVxeM+APbP4Zg/h4LBIDxX9oM/W1Wc5QI9OCPkSzrqIoFEm+0TSyB9g601rXcZL94ww xNWA== X-Forwarded-Encrypted: i=1; AJvYcCXLFab2hu/QGkDpVt+c4byFUkL6pcexFGuxDk/nw8hHc9DOGKd/SpJbI567Qb+Peuq/KJU5kfRZoCNHuqA=@vger.kernel.org X-Gm-Message-State: AOJu0YxcivwWYGUITKY8dp5IxtgRvyoV8oSrKTGe45tcfN1YhJFR59Wi kdVUG1JNQbPpPhVVJqiZj/MXeIflVYffxPFeZuYB6DMNEWRrrZ1z1BmkuJTcYdW6CbL+Cyxp+uB 2p36xra02kWZ0VEC2Xtqk628+kB+5WV9+TP9K4mL92h76d62/LtuXDn8= X-Google-Smtp-Source: AGHT+IFfPw1Mrcs2bzR2K8vzGTdBd9zz1nwrUlZ9PNEF2WlofTnrrHk8KiiEmzuRRTLIXkJMCCv3gZ7NTqLmMuA3g3hnf6fMzzu4 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c0d:b0:39b:2ceb:1a23 with SMTP id e9e14a558f8ab-3a0848cb40fmr19924375ab.3.1726132890619; Thu, 12 Sep 2024 02:21:30 -0700 (PDT) Date: Thu, 12 Sep 2024 02:21:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c7e54f0621e8a14f@google.com> Subject: [syzbot] [ocfs2?] KASAN: slab-use-after-free Read in ocfs2_fault From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 88fac17500f4 Merge tag 'fuse-fixes-6.11-rc7' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16f47d09980000 kernel config: https://syzkaller.appspot.com/x/.config?x=660f6eb11f9c7dc5 dashboard link: https://syzkaller.appspot.com/bug?extid=a49010a0e8fcdeea075f compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-88fac175.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/de92cf928379/vmlinux-88fac175.xz kernel image: https://storage.googleapis.com/syzbot-assets/253b0e12054b/bzImage-88fac175.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a49010a0e8fcdeea075f@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in ocfs2_fault+0xe9/0x3d0 fs/ocfs2/mmap.c:41 Read of size 8 at addr ffff888012015080 by task syz.0.0/5116 CPU: 0 UID: 0 PID: 5116 Comm: syz.0.0 Not tainted 6.11.0-rc6-syzkaller-00026-g88fac17500f4 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ocfs2_fault+0xe9/0x3d0 fs/ocfs2/mmap.c:41 __do_fault+0x135/0x460 mm/memory.c:4655 do_read_fault mm/memory.c:5061 [inline] do_fault mm/memory.c:5191 [inline] do_pte_missing mm/memory.c:3947 [inline] handle_pte_fault+0x321f/0x6fc0 mm/memory.c:5521 __handle_mm_fault mm/memory.c:5664 [inline] handle_mm_fault+0x1109/0x1bc0 mm/memory.c:5832 faultin_page mm/gup.c:1194 [inline] __get_user_pages+0x6ec/0x16a0 mm/gup.c:1493 populate_vma_page_range+0x264/0x330 mm/gup.c:1932 __mm_populate+0x27a/0x460 mm/gup.c:2035 mm_populate include/linux/mm.h:3430 [inline] vm_mmap_pgoff+0x2c3/0x3d0 mm/util.c:593 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3a03b7cef9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3a0496f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f3a03d36058 RCX: 00007f3a03b7cef9 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f3a03bef01e R08: 000000000000000a R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3a03d36058 R15: 00007fffb8722f38 Allocated by task 5116: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044 vm_area_alloc+0x24/0x1d0 kernel/fork.c:471 mmap_region+0xc3d/0x2090 mm/mmap.c:2944 do_mmap+0x8f9/0x1010 mm/mmap.c:1468 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 16: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4548 rcu_do_batch kernel/rcu/tree.c:2569 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2843 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:928 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3106 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3210 remove_vma mm/mmap.c:189 [inline] remove_mt mm/mmap.c:2415 [inline] do_vmi_align_munmap+0x155c/0x18c0 mm/mmap.c:2758 do_vmi_munmap+0x261/0x2f0 mm/mmap.c:2830 mmap_region+0x72f/0x2090 mm/mmap.c:2881 do_mmap+0x8f9/0x1010 mm/mmap.c:1468 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888012015000 which belongs to the cache vm_area_struct of size 184 The buggy address is located 128 bytes inside of freed 184-byte region [ffff888012015000, ffff8880120150b8) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12015 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff88801be90b40 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000001fdffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 4814, tgid 4814 (dhcpcd), ts 49914646081, free_ts 49681178375 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2321 allocate_slab+0x5a/0x2f0 mm/slub.c:2484 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 __slab_alloc+0x58/0xa0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4044 vm_area_dup+0x27/0x290 kernel/fork.c:486 dup_mmap kernel/fork.c:695 [inline] dup_mm kernel/fork.c:1672 [inline] copy_mm+0xc7b/0x1f30 kernel/fork.c:1721 copy_process+0x187a/0x3dc0 kernel/fork.c:2374 kernel_clone+0x226/0x8f0 kernel/fork.c:2781 __do_sys_clone kernel/fork.c:2924 [inline] __se_sys_clone kernel/fork.c:2908 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2908 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 4895 tgid 4895 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_folios+0x103a/0x1b00 mm/page_alloc.c:2660 folios_put_refs+0x76e/0x860 mm/swap.c:1039 free_pages_and_swap_cache+0x5c8/0x690 mm/swap_state.c:335 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465 exit_mmap+0x44f/0xc80 mm/mmap.c:3425 __mmput+0x115/0x390 kernel/fork.c:1345 exit_mm+0x220/0x310 kernel/exit.c:571 do_exit+0x9b2/0x27f0 kernel/exit.c:869 do_group_exit+0x207/0x2c0 kernel/exit.c:1031 __do_sys_exit_group kernel/exit.c:1042 [inline] __se_sys_exit_group kernel/exit.c:1040 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888012014f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888012015000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888012015080: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa ^ ffff888012015100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888012015180: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 ================================================================== --- This report is generated by a bot. 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