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 1A188C7EE45 for ; Wed, 7 Jun 2023 00:11:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240107AbjFGALN convert rfc822-to-8bit (ORCPT ); Tue, 6 Jun 2023 20:11:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240024AbjFGALK (ORCPT ); Tue, 6 Jun 2023 20:11:10 -0400 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 547DE1988 for ; Tue, 6 Jun 2023 17:11:07 -0700 (PDT) Received: by mail-io1-f79.google.com with SMTP id ca18e2360f4ac-77a13410773so136679439f.3 for ; Tue, 06 Jun 2023 17:11:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686096666; x=1688688666; h=content-transfer-encoding:to:from:subject:message-id:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=vvlqLDNCjcUMI27YWV13I+7apL/AauOa3lyDOfDowi0=; b=WCC3FKTAmC4YjVdvjY9/1nQTun455s2WAKSPnJAQGmR+FudMBySN9s6LR8eL/5Vmyo mPqpe48aIlLFNojGimoTR19Dz8S2gcuR0/plZfT8yjLYlFb9k+CZPi6aNF2MPemAlMNE VizQ3poobi8UtJK6EOP/5Jon2vBmPKp5vYfuGz6GYUiHushV3KnhZIxe9ZWeZY6l4Vgp V/yYQT+O3zqfmiRVxFMlChRB2rqQnNTID+8p2ItZnWHs82/BoR1osSlo1cE/mfeOYUVN Vt5oy2EjrKF2Uc85f+hu9kUF0Ioyh6KL0ZI5Y+baWXuc3iOyt99FLg8DUHsmlN56IksC UVJQ== X-Gm-Message-State: AC+VfDyxUsC4UjXoWN8SOTn89tkpy2QLiWCTtY8EM2awYQqaqygqlU7v 0Ga7CDPpEORVrpPq1uyzTTKnGKXDveryUSQ2oCuqCNkDEY5o X-Google-Smtp-Source: ACHHUZ6hxjmjoQBl7YkEjN+gapxJqI8BUJ940W5pnhXmHWFfDg5cj7lkfeTbINmsg/bktA3n/i4kHhung4GEwRq2wA5dsDMl7NsL MIME-Version: 1.0 X-Received: by 2002:a92:c94a:0:b0:33e:325a:cc11 with SMTP id i10-20020a92c94a000000b0033e325acc11mr700329ilq.5.1686096666553; Tue, 06 Jun 2023 17:11:06 -0700 (PDT) Date: Tue, 06 Jun 2023 17:11:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ddfe0405fd7ef847@google.com> Subject: [syzbot] [ext4?] KASAN: slab-use-after-free Read in __ext4_iget From: syzbot To: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: a4d7d7011219 Merge tag 'spi-fix-v6.4-rc5' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1455f745280000 kernel config: https://syzkaller.appspot.com/x/.config?x=7474de833c217bf4 dashboard link: https://syzkaller.appspot.com/bug?extid=5407ecf3112f882d2ef3 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/dedc2e62381b/disk-a4d7d701.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4809d6c705ea/vmlinux-a4d7d701.xz kernel image: https://storage.googleapis.com/syzbot-assets/5a89bc184831/bzImage-a4d7d701.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5407ecf3112f882d2ef3@syzkaller.appspotmail.com loop5: detected capacity change from 0 to 2048 ================================================================== BUG: KASAN: slab-use-after-free in __ext4_iget+0x2f2/0x3f30 fs/ext4/inode.c:4700 Read of size 8 at addr ffff888078ca5550 by task syz-executor.5/26112 CPU: 1 PID: 26112 Comm: syz-executor.5 Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:351 [inline] print_report+0x163/0x540 mm/kasan/report.c:462 kasan_report+0x176/0x1b0 mm/kasan/report.c:572 __ext4_iget+0x2f2/0x3f30 fs/ext4/inode.c:4700 __ext4_fill_super fs/ext4/super.c:5446 [inline] ext4_fill_super+0x545b/0x6c60 fs/ext4/super.c:5672 get_tree_bdev+0x405/0x620 fs/super.c:1303 vfs_get_tree+0x8c/0x270 fs/super.c:1510 do_new_mount+0x28f/0xae0 fs/namespace.c:3039 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2842e8d69a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007f2843c59f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000000007b1 RCX: 00007f2842e8d69a RDX: 0000000020000780 RSI: 0000000020000000 RDI: 00007f2843c59fe0 RBP: 00007f2843c5a020 R08: 00007f2843c5a020 R09: 0000000002000480 R10: 0000000002000480 R11: 0000000000000202 R12: 0000000020000780 R13: 0000000020000000 R14: 00007f2843c59fe0 R15: 00000000200000c0 Allocated by task 20729: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:711 slab_alloc_node mm/slub.c:3451 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc_lru+0x11f/0x2e0 mm/slub.c:3482 alloc_inode_sb include/linux/fs.h:2705 [inline] reiserfs_alloc_inode+0x2a/0xc0 fs/reiserfs/super.c:642 alloc_inode fs/inode.c:260 [inline] iget5_locked+0xa0/0x270 fs/inode.c:1241 reiserfs_fill_super+0x12e4/0x2620 fs/reiserfs/super.c:2053 mount_bdev+0x2d0/0x3f0 fs/super.c:1380 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1510 do_new_mount+0x28f/0xae0 fs/namespace.c:3039 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491 __call_rcu_common kernel/rcu/tree.c:2627 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2741 dispose_list fs/inode.c:698 [inline] evict_inodes+0x5f8/0x690 fs/inode.c:748 generic_shutdown_super+0x98/0x340 fs/super.c:479 kill_block_super+0x84/0xf0 fs/super.c:1407 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491 __call_rcu_common kernel/rcu/tree.c:2627 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2741 dispose_list fs/inode.c:698 [inline] evict_inodes+0x5f8/0x690 fs/inode.c:748 generic_shutdown_super+0x98/0x340 fs/super.c:479 kill_block_super+0x84/0xf0 fs/super.c:1407 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888078ca4f80 which belongs to the cache reiser_inode_cache of size 1568 The buggy address is located 1488 bytes inside of freed 1568-byte region [ffff888078ca4f80, ffff888078ca55a0) The buggy address belongs to the physical page: page:ffffea0001e32800 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888078ca5cc0 pfn:0x78ca0 head:ffffea0001e32800 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888019f32101 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff8881400cba00 dead000000000122 0000000000000000 raw: ffff888078ca5cc0 000000008013000a 00000001ffffffff ffff888019f32101 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 965, tgid 940 (syz-executor.1), ts 1300044371541, free_ts 1155942618814 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502 __alloc_pages+0x255/0x670 mm/page_alloc.c:4768 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3192 __slab_alloc mm/slub.c:3291 [inline] __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc_lru+0x1b9/0x2e0 mm/slub.c:3482 alloc_inode_sb include/linux/fs.h:2705 [inline] reiserfs_alloc_inode+0x2a/0xc0 fs/reiserfs/super.c:642 alloc_inode fs/inode.c:260 [inline] new_inode_pseudo+0x65/0x1d0 fs/inode.c:1018 new_inode+0x29/0x1d0 fs/inode.c:1046 reiserfs_create+0x182/0x6e0 fs/reiserfs/namei.c:641 lookup_open fs/namei.c:3492 [inline] open_last_lookups fs/namei.c:3560 [inline] path_openat+0x13df/0x3170 fs/namei.c:3788 do_filp_open+0x234/0x490 fs/namei.c:3818 do_sys_openat2+0x13f/0x500 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_open fs/open.c:1380 [inline] __se_sys_open fs/open.c:1376 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1376 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2564 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2659 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:711 slab_alloc_node mm/slub.c:3451 [inline] slab_alloc mm/slub.c:3459 [inline] __kmem_cache_alloc_lru mm/slub.c:3466 [inline] kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3475 getname_flags+0xbc/0x4e0 fs/namei.c:140 getname fs/namei.c:219 [inline] __do_sys_mkdirat fs/namei.c:4153 [inline] __se_sys_mkdirat fs/namei.c:4151 [inline] __x64_sys_mkdirat+0x7c/0xa0 fs/namei.c:4151 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888078ca5400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888078ca5480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888078ca5500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888078ca5580: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff888078ca5600: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- This report is generated by a bot. 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