From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 015E6189F2A for ; Tue, 13 Aug 2024 09:52:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723542732; cv=none; b=Dn+8MMDNL0Zww+Z55bdhrQSi9MKhwAZmTeBeLlbGcFBTeC0BRtzxxfJN+KwxXAe/ZnoGKllOoWYjYvvPbGLjAhI1l9b/RImz79NYZYSmkRtFtwth0DNzYcc71aEN2AFtslLP++Mi1o9MJ4wIfL941eBMhWZkC7NWh1l5u8O1hxk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723542732; c=relaxed/simple; bh=mliOT5sF/c6G1ykt7Gg/Ps9h7dqFg8KEdYmAxnjEAUc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=kzGO7D8MbiAu8mwANrXxQ/s/I3hEEXiGnvweQHC8ZBUziRld4AhmLo3LGRmdzK41ljigPWSKzoQhW4ZmDzp0dLityfyIKzpwiw0AXg/Bxhrm9SybdiGqWiO3EMRVJHJl5crYHh3GIRjMvphoUQorAVGDg3uk+hLFb0r/LEzETig= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VI1p9FV2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VI1p9FV2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E83BAC4AF0B; Tue, 13 Aug 2024 09:52:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723542731; bh=mliOT5sF/c6G1ykt7Gg/Ps9h7dqFg8KEdYmAxnjEAUc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=VI1p9FV2r5Tk28XdZ1eYLjP3i+8xYJ5M4xN91ntF1WztILdIkCSOum+1aV7/BBbHr x/0xkAWYmMrj3N70U2apPifiGOV3FeXCaVlI4WT/8ghcOASpFxFLMgpXfUCp3NF6YO 2XMxuP8jCPBYi5QMr2bAJWUV8U3Nc+62Nzgruu6au7Af25AFLeGD7SbNBkTx6ZfTLA /Fi77CKxRZ30fjfrEAj4tAqK96HItvvkORB8H5TwvRWGsoEfSkN9lcdTHvoYQz+D0g rtehWXadNgbyhU9PWn12k4L9o2Cj0P/NPUdHybqadsh6qyQL6FrL8Zz1nJ3PbWeLdh SSfegY0jc8sSw== Message-ID: Date: Tue, 13 Aug 2024 17:52:08 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: KASAN: slab-use-after-free Read in __destroy_extent_node To: Ubisectech Sirius Cc: jaegeuk , linux-kernel References: Content-Language: en-US From: Chao Yu In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2024/8/5 9:33, Ubisectech Sirius wrote: > Hello. > We are Ubisectech Sirius Team, the vulnerability lab of China ValiantSec. Recently, our team has discovered a issue in Linux kernel 6.8. Attached to the email were a PoC file of the issue. Hi, syzbot has reported this issue, and it has been fixed by below commit. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d7409b05a64f212735f0d33f5f1602051a886eab Thanks, > > Stack dump: > > R13: 000000000000006e R14: 00007f03a5b34078 R15: 00007f03a6781000 > > F2FS-fs (loop3): sanity_check_extent_cache: inode (ino=8) extent info [5634, 0, 3] is incorrect, run fsck to fix > ================================================================== > BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] > BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] > BUG: KASAN: slab-use-after-free in __destroy_extent_node+0xb8/0x260 fs/f2fs/extent_cache.c:1061 > Read of size 4 at addr ffff8880516c3070 by task syz.3.23/9717 > > CPU: 1 PID: 9717 Comm: syz.3.23 Not tainted 6.10.0-rc6-g1dfe225e9af5 #48 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 > Call Trace: > > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0x116/0x1b0 lib/dump_stack.c:114 > print_address_description mm/kasan/report.c:377 [inline] > print_report+0xc0/0x5e0 mm/kasan/report.c:488 > kasan_report+0xbd/0xf0 mm/kasan/report.c:601 > check_region_inline mm/kasan/generic.c:183 [inline] > kasan_check_range+0xf4/0x1a0 mm/kasan/generic.c:189 > instrument_atomic_read include/linux/instrumented.h:68 [inline] > atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] > __destroy_extent_node+0xb8/0x260 fs/f2fs/extent_cache.c:1061 > __destroy_extent_tree+0x14a/0x6f0 fs/f2fs/extent_cache.c:1126 > f2fs_destroy_extent_tree+0x17/0x30 fs/f2fs/extent_cache.c:1143 > f2fs_evict_inode+0x3ff/0x1da0 fs/f2fs/inode.c:837 > evict+0x2ed/0x6c0 fs/inode.c:667 > iput_final fs/inode.c:1741 [inline] > iput.part.0+0x559/0x760 fs/inode.c:1767 > iput+0x5c/0x80 fs/inode.c:1757 > f2fs_iget+0xfe6/0x5a40 fs/f2fs/inode.c:627 > f2fs_nfs_get_inode fs/f2fs/super.c:3265 [inline] > f2fs_nfs_get_inode+0x86/0x130 fs/f2fs/super.c:3251 > generic_fh_to_dentry+0xdf/0x110 fs/libfs.c:1456 > exportfs_decode_fh_raw+0x12b/0x7a0 fs/exportfs/expfs.c:444 > exportfs_decode_fh+0x3c/0x90 fs/exportfs/expfs.c:584 > do_handle_to_path fs/fhandle.c:155 [inline] > handle_to_path fs/fhandle.c:210 [inline] > do_handle_open+0x2bc/0x590 fs/fhandle.c:226 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xcb/0x250 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f03a59958cd > Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 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:00007f03a67a0fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 > RAX: ffffffffffffffda RBX: 00007f03a5b34078 RCX: 00007f03a59958cd > RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 > RBP: 00007f03a5a2d6e6 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 000000000000006e R14: 00007f03a5b34078 R15: 00007f03a6781000 > > > Allocated by task 9642: > kasan_save_stack+0x24/0x50 mm/kasan/common.c:47 > kasan_save_track+0x14/0x30 mm/kasan/common.c:68 > unpoison_slab_object mm/kasan/common.c:312 [inline] > __kasan_slab_alloc+0x87/0x90 mm/kasan/common.c:338 > kasan_slab_alloc include/linux/kasan.h:201 [inline] > slab_post_alloc_hook mm/slub.c:3940 [inline] > slab_alloc_node mm/slub.c:4002 [inline] > kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4009 > f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2815 [inline] > f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2825 [inline] > __grab_extent_tree+0x27c/0x5b0 fs/f2fs/extent_cache.c:334 > f2fs_init_read_extent_tree+0x1e2/0x710 fs/f2fs/extent_cache.c:405 > do_read_inode fs/f2fs/inode.c:512 [inline] > f2fs_iget+0x1e1e/0x5a40 fs/f2fs/inode.c:566 > f2fs_nfs_get_inode fs/f2fs/super.c:3265 [inline] > f2fs_nfs_get_inode+0x86/0x130 fs/f2fs/super.c:3251 > generic_fh_to_dentry+0xdf/0x110 fs/libfs.c:1456 > exportfs_decode_fh_raw+0x12b/0x7a0 fs/exportfs/expfs.c:444 > exportfs_decode_fh+0x3c/0x90 fs/exportfs/expfs.c:584 > do_handle_to_path fs/fhandle.c:155 [inline] > handle_to_path fs/fhandle.c:210 [inline] > do_handle_open+0x2bc/0x590 fs/fhandle.c:226 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xcb/0x250 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > Freed by task 9642: > kasan_save_stack+0x24/0x50 mm/kasan/common.c:47 > kasan_save_track+0x14/0x30 mm/kasan/common.c:68 > kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 > poison_slab_object mm/kasan/common.c:240 [inline] > poison_slab_object+0xf9/0x180 mm/kasan/common.c:211 > __kasan_slab_free+0x33/0x50 mm/kasan/common.c:256 > kasan_slab_free include/linux/kasan.h:184 [inline] > slab_free_hook mm/slub.c:2196 [inline] > slab_free mm/slub.c:4438 [inline] > kmem_cache_free+0x12a/0x3a0 mm/slub.c:4513 > __destroy_extent_tree+0x1f8/0x6f0 fs/f2fs/extent_cache.c:1132 > f2fs_destroy_extent_tree+0x17/0x30 fs/f2fs/extent_cache.c:1143 > f2fs_evict_inode+0x3ff/0x1da0 fs/f2fs/inode.c:837 > evict+0x2ed/0x6c0 fs/inode.c:667 > iput_final fs/inode.c:1741 [inline] > iput.part.0+0x559/0x760 fs/inode.c:1767 > iput+0x5c/0x80 fs/inode.c:1757 > f2fs_iget+0xfe6/0x5a40 fs/f2fs/inode.c:627 > f2fs_nfs_get_inode fs/f2fs/super.c:3265 [inline] > f2fs_nfs_get_inode+0x86/0x130 fs/f2fs/super.c:3251 > generic_fh_to_dentry+0xdf/0x110 fs/libfs.c:1456 > exportfs_decode_fh_raw+0x12b/0x7a0 fs/exportfs/expfs.c:444 > exportfs_decode_fh+0x3c/0x90 fs/exportfs/expfs.c:584 > do_handle_to_path fs/fhandle.c:155 [inline] > handle_to_path fs/fhandle.c:210 [inline] > do_handle_open+0x2bc/0x590 fs/fhandle.c:226 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xcb/0x250 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > The buggy address belongs to the object at ffff8880516c3000 > which belongs to the cache f2fs_extent_tree of size 144 > The buggy address is located 112 bytes inside of > freed 144-byte region [ffff8880516c3000, ffff8880516c3090) > > The buggy address belongs to the physical page: > page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x516c3 > flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) > page_type: 0xffffefff(slab) > raw: 04fff00000000000 ffff888042d6c640 dead000000000122 0000000000000000 > raw: 0000000000000000 0000000080130013 00000001ffffefff 0000000000000000 > page dumped because: kasan: bad access detected > page_owner tracks the page as allocated > page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x152c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 9642, tgid 9641 (syz.3.23), ts 151346879967, free_ts 0 > set_page_owner include/linux/page_owner.h:32 [inline] > post_alloc_hook+0x2e7/0x350 mm/page_alloc.c:1473 > prep_new_page mm/page_alloc.c:1481 [inline] > get_page_from_freelist+0xbf4/0x2850 mm/page_alloc.c:3425 > __alloc_pages_noprof+0x214/0x21e0 mm/page_alloc.c:4683 > __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] > alloc_pages_node_noprof include/linux/gfp.h:296 [inline] > alloc_slab_page+0x5d/0x120 mm/slub.c:2265 > allocate_slab mm/slub.c:2428 [inline] > new_slab+0x83/0x260 mm/slub.c:2481 > ___slab_alloc+0xbb7/0x1850 mm/slub.c:3667 > __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757 > __slab_alloc_node mm/slub.c:3810 [inline] > slab_alloc_node mm/slub.c:3990 [inline] > kmem_cache_alloc_noprof+0x2a8/0x2f0 mm/slub.c:4009 > f2fs_kmem_cache_alloc_nofail fs/f2fs/f2fs.h:2815 [inline] > f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2825 [inline] > __grab_extent_tree+0x27c/0x5b0 fs/f2fs/extent_cache.c:334 > f2fs_init_read_extent_tree+0x1e2/0x710 fs/f2fs/extent_cache.c:405 > do_read_inode fs/f2fs/inode.c:512 [inline] > f2fs_iget+0x1e1e/0x5a40 fs/f2fs/inode.c:566 > f2fs_nfs_get_inode fs/f2fs/super.c:3265 [inline] > f2fs_nfs_get_inode+0x86/0x130 fs/f2fs/super.c:3251 > generic_fh_to_dentry+0xdf/0x110 fs/libfs.c:1456 > exportfs_decode_fh_raw+0x12b/0x7a0 fs/exportfs/expfs.c:444 > exportfs_decode_fh+0x3c/0x90 fs/exportfs/expfs.c:584 > do_handle_to_path fs/fhandle.c:155 [inline] > handle_to_path fs/fhandle.c:210 [inline] > do_handle_open+0x2bc/0x590 fs/fhandle.c:226 > page_owner free stack trace missing > > Memory state around the buggy address: > ffff8880516c2f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8880516c2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >> ffff8880516c3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ^ > ffff8880516c3080: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8880516c3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ================================================================== > > > Thank you for taking the time to read this email and we look forward to working with you further. > > > >