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 3BE9BC77B73 for ; Sat, 6 May 2023 21:59:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229939AbjEFV7y (ORCPT ); Sat, 6 May 2023 17:59:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229887AbjEFV7u (ORCPT ); Sat, 6 May 2023 17:59:50 -0400 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB37F23A0C for ; Sat, 6 May 2023 14:59:40 -0700 (PDT) Received: by mail-il1-f208.google.com with SMTP id e9e14a558f8ab-331663d8509so45450455ab.0 for ; Sat, 06 May 2023 14:59:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683410380; x=1686002380; 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=PgYZjWeLjexrGnFDmI0IYPb/iqEp6EDD1WBE5yqbwfk=; b=S4W361qH46Bk5AIauAUUPf9TUQboQnpINz65ydXiQYsuGfinVqNsHM1y0u9bgLFyH/ E83JcWymBr4eo/TbtFcQP2/nxyGgiJlW1GWpHPg7RRFxPKFwzwmj4JwXqAin6v1S0e5y zImD/sxMl/wH+DqFkdXzDsbZthi7PsPze8dBbMsv07c/1U/wBvsm5Gxmo0Rc8J62HaDq UxcGrRwSCgqP35ROP0WVFjdl2TPgJ0v1/HYmknU5YdlMSNrwYl6t2uDYYEJ6dtdxVkvr gB6nG8JNavLLvmSDThBrLtyC2iq363q2OltvfKoZGg2Y4lo4rMkh/EDqJtJrtJq4McaR z1/Q== X-Gm-Message-State: AC+VfDx9CaGST+Deh2bgonufL1X7B0OPsXV9ECq+pTL9UzgolDdxP/Kt ORZOHDGOYEhnGCen8DwoxKS7e2bGZjIyO+nLqd82X6cighH4 X-Google-Smtp-Source: ACHHUZ79bcqBI6KLTxLPX4YDc4m+OwynPMVcrzLLhxpu5GX95K2MtFfkS7G2xtc0kDPArCkLdXOkqPxlgvbCLNiQ5+zVaQcQEaSY MIME-Version: 1.0 X-Received: by 2002:a92:cb42:0:b0:331:e520:8631 with SMTP id f2-20020a92cb42000000b00331e5208631mr2917061ilq.2.1683410379943; Sat, 06 May 2023 14:59:39 -0700 (PDT) Date: Sat, 06 May 2023 14:59:39 -0700 In-Reply-To: <00000000000075fe1b05f6f415f7@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b5386505fb0d854c@google.com> Subject: Re: [syzbot] [ext4?] WARNING in kvfree (2) 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" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 14f8db1c0f9a Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=16b08d88280000 kernel config: https://syzkaller.appspot.com/x/.config?x=a837a8ba7e88bb45 dashboard link: https://syzkaller.appspot.com/bug?extid=64b645917ce07d89bde5 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17eb3df2280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a6af18280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ad6ce516eed3/disk-14f8db1c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1f38c2cc7667/vmlinux-14f8db1c.xz kernel image: https://storage.googleapis.com/syzbot-assets/d795115eee39/Image-14f8db1c.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/66c0bf3e4f09/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+64b645917ce07d89bde5@syzkaller.appspotmail.com EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5931 at mm/slab_common.c:935 free_large_kmalloc+0x34/0x12c mm/slab_common.c:936 Modules linked in: CPU: 1 PID: 5931 Comm: syz-executor235 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : free_large_kmalloc+0x34/0x12c mm/slab_common.c:936 lr : kfree+0xf8/0x19c mm/slab_common.c:1013 sp : ffff80001e5a74e0 x29: ffff80001e5a74e0 x28: ffff0000deac34d8 x27: ffff0000e23195a4 x26: dfff800000000000 x25: 0000000000000020 x24: ffff0000c7a3ad00 x23: ffff0000c7a3a400 x22: 0000000000000000 x21: ffff800008809968 x20: ffff0000e23195a4 x19: fffffc000388c640 x18: ffff80001e5a6e80 x17: ffff800015d6d000 x16: ffff80001236e294 x15: ffff800008a6cf5c x14: ffff800008a6cb2c x13: ffff800008062fb8 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000000 x9 : 05ffc0000000202a x8 : ffff800018986000 x7 : ffff800008063224 x6 : ffff800008063434 x5 : ffff0000d182bf38 x4 : ffff80001e5a72b0 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff0000e23195a4 x0 : fffffc000388c640 Call trace: free_large_kmalloc+0x34/0x12c mm/slab_common.c:936 kfree+0xf8/0x19c mm/slab_common.c:1013 kvfree+0x40/0x50 mm/util.c:649 ext4_xattr_move_to_block fs/ext4/xattr.c:2680 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2743 [inline] ext4_expand_extra_isize_ea+0xcec/0x16b4 fs/ext4/xattr.c:2835 __ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5960 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6003 [inline] __ext4_mark_inode_dirty+0x448/0x848 fs/ext4/inode.c:6081 __ext4_unlink+0x768/0x998 fs/ext4/namei.c:3255 ext4_unlink+0x1b4/0x6a0 fs/ext4/namei.c:3298 vfs_unlink+0x2f0/0x508 fs/namei.c:4250 do_unlinkat+0x4c8/0x82c fs/namei.c:4316 __do_sys_unlinkat fs/namei.c:4359 [inline] __se_sys_unlinkat fs/namei.c:4352 [inline] __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4352 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 16132 hardirqs last enabled at (16131): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:242 hardirqs last disabled at (16132): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (15474): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (15472): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- object pointer: 0x000000001bcaf4ec ================================================================== BUG: KASAN: invalid-free in kfree+0xf8/0x19c mm/slab_common.c:1013 Free of addr ffff0000e23195a4 by task syz-executor235/5931 CPU: 1 PID: 5931 Comm: syz-executor235 Tainted: G W 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x174/0x514 mm/kasan/report.c:430 kasan_report_invalid_free+0xc4/0x114 mm/kasan/report.c:501 __kasan_kfree_large+0xa4/0xc0 mm/kasan/common.c:272 kasan_kfree_large include/linux/kasan.h:170 [inline] free_large_kmalloc+0x64/0x12c mm/slab_common.c:939 kfree+0xf8/0x19c mm/slab_common.c:1013 kvfree+0x40/0x50 mm/util.c:649 ext4_xattr_move_to_block fs/ext4/xattr.c:2680 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2743 [inline] ext4_expand_extra_isize_ea+0xcec/0x16b4 fs/ext4/xattr.c:2835 __ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5960 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6003 [inline] __ext4_mark_inode_dirty+0x448/0x848 fs/ext4/inode.c:6081 __ext4_unlink+0x768/0x998 fs/ext4/namei.c:3255 ext4_unlink+0x1b4/0x6a0 fs/ext4/namei.c:3298 vfs_unlink+0x2f0/0x508 fs/namei.c:4250 do_unlinkat+0x4c8/0x82c fs/namei.c:4316 __do_sys_unlinkat fs/namei.c:4359 [inline] __se_sys_unlinkat fs/namei.c:4352 [inline] __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4352 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 The buggy address belongs to the physical page: page:00000000c0a5c392 refcount:2 mapcount:0 mapping:0000000007c227a9 index:0x1 pfn:0x122319 memcg:ffff0000c1964000 aops:def_blk_aops ino:700000 flags: 0x5ffc0000002203e(referenced|uptodate|dirty|lru|active|private|mappedtodisk|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc0000002203e fffffc00061e7788 ffff0000c0036030 ffff0000c149ca10 raw: 0000000000000001 ffff0000e1554570 00000002ffffffff ffff0000c1964000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e2319480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000e2319500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000e2319580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff0000e2319600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000e2319680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.