From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 290B42620E4 for ; Wed, 25 Jun 2025 14:41:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750862489; cv=none; b=KbOvVY2SHJdtxYptwwwygDUg+ykxACs8ICweMX6YkB1DL3BDsDe1iJ2tnkoWhb50bJ766zlCzj6j0sJ/kicPTpHhok/BGsOihc1ki0lQth5RDUrvc530niH4DHbuPi/k52j9PeCR1A3JmXbh18lQWb0vefHiDT9WvVbqn+q+8F0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750862489; c=relaxed/simple; bh=OByHNjmN/xaoYcZp3ws/ocDd7Iqgcjfde70VtKIxQEo=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=ZyfG3+VkkGzaapKOyqpgxZ+CwBEU/j/eBy7N8RKXerIhxmAF8Ded0hdAnJL7t5Ob7P8Q2uLv9xIW+XeV+2i4bT7Do7ZQPr5jJhXBGTdx3r3PF1/hGs/28JjNu8Kr13zFE/sEsoCNWjg6LV0/H0gR1n1KQyj9idWl3duw0nZQRQY= 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=209.85.166.205 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-f205.google.com with SMTP id e9e14a558f8ab-3ddbec809acso24361345ab.2 for ; Wed, 25 Jun 2025 07:41:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750862486; x=1751467286; 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=XjoRFej/UKb8LuFDoRlRF1Np8CWhwwmwQcq7gCrq3vg=; b=cUoUf/vecHZRzRsa41Veeh8eEcDkN96FzTtUfgvLCN/2f2St+sEljEw7XbCK9u70b2 //B3/BPSLZOBoOmHv04WT0Y6mFRlUC/YUX2pVdUT7brsaD5lzCPxaD4EcKKVG3iyelgp 82q698wjY2OSfh/ozJ1ufkERSbL+uKGw9vNJ/NrPJ1aF6vFwntH+IMzuivp07KZtBMTK bppchdBuyH6oSv2JYf7fGIEvj9N671e9w36QxD1IWc0JmQCTbPChhwaiEJ0Gl1NkJA5z ZDQhz+BWWO77ETbcJcQQtn83KeN3u+bMaAyJ/IDUIKUJXCeNfKX2hWd9mMCKLODzmx6X EHnw== X-Forwarded-Encrypted: i=1; AJvYcCU7sQauWUxfnyhUJfJg9TPWjNXlyCzKbqhv4dBK4hV7huPZEWRKAkrPCWm55B9IYzNI7LdvyTrgxS3O@vger.kernel.org X-Gm-Message-State: AOJu0YzErwt1N4ESDbtuh26mGR7S4FtOccMKzr7Nse+Xe1aRMrM/Hwn1 JYYy3pMrhWrHv6gEqun597f7r/0jAXmk3FHsQER0Es9XCAIYrEHio9O1pllBMDp897CBTMOfCNY 8rlhCligaOgyS6UR+JcJPGmPiaFm8d5keKin8SEciONKZ/dKnYf/GyjVYtpw= X-Google-Smtp-Source: AGHT+IGUhXYBuDfGFwI0FKkrMRCOgbtkJD7xxrow/+iajmYcam1hY2is0OzHQPo/I0qDtDU3UUjpNtjL25Totmrl3lDoM1Cclo3V Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c24f:0:b0:3dc:8bb8:28a1 with SMTP id e9e14a558f8ab-3df3296d5ebmr39617735ab.14.1750862486178; Wed, 25 Jun 2025 07:41:26 -0700 (PDT) Date: Wed, 25 Jun 2025 07:41:26 -0700 In-Reply-To: <67ea7949.050a0220.1547ec.0137.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <685c0a96.a00a0220.2e5631.00d9.GAE@google.com> Subject: Re: [syzbot] [ext4?] KASAN: slab-use-after-free Read in ext4_ext_remove_space From: syzbot To: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 9aa9b43d689e 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=1052df0c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=27f179c74d5c35cd dashboard link: https://syzkaller.appspot.com/bug?extid=b73703b873a33d8eb8f6 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10809b70580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=106cbdd4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/974f3ac1c6a5/disk-9aa9b43d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a5b5075d317f/vmlinux-9aa9b43d.xz kernel image: https://storage.googleapis.com/syzbot-assets/2f0ba7fec19b/Image-9aa9b43d.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/e99c31ce9609/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=13c1d182580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b73703b873a33d8eb8f6@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in ext4_ext_rm_leaf fs/ext4/extents.c:2627 [inline] BUG: KASAN: use-after-free in ext4_ext_remove_space+0x276c/0x37c8 fs/ext4/extents.c:2965 Read of size 4 at addr ffff0000df6bdc18 by task syz-executor309/6516 CPU: 1 UID: 0 PID: 6516 Comm: syz-executor309 Not tainted 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x254 mm/kasan/report.c:408 print_report+0x68/0x84 mm/kasan/report.c:521 kasan_report+0xb0/0x110 mm/kasan/report.c:634 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380 ext4_ext_rm_leaf fs/ext4/extents.c:2627 [inline] ext4_ext_remove_space+0x276c/0x37c8 fs/ext4/extents.c:2965 ext4_ext_truncate+0x134/0x1d0 fs/ext4/extents.c:4484 ext4_truncate+0x9c4/0xfe0 fs/ext4/inode.c:4574 ext4_evict_inode+0x9b4/0x104c fs/ext4/inode.c:261 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1898 [inline] iput+0x6e4/0x83c fs/inode.c:1924 do_unlinkat+0x338/0x4dc fs/namei.c:4657 __do_sys_unlinkat fs/namei.c:4691 [inline] __se_sys_unlinkat fs/namei.c:4684 [inline] __arm64_sys_unlinkat+0xdc/0xf8 fs/namei.c:4684 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xea pfn:0x11f6bd flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 fffffdffc37daf88 fffffdffc37daf08 0000000000000000 raw: 00000000000000ea 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000df6bdb00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000df6bdb80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff0000df6bdc00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000df6bdc80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000df6bdd00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 2244176752, count = 0 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 147072565182463, count = 27456 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 32928, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 175, count = 32767 EXT4-fs error (device loop0): mb_free_blocks:1948: group 0, inode 18: block 145:freeing already freed block (bit 9); block bitmap corrupt. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 174 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 2244176584, count = 0 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 4 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 3036617056, count = 0 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 4294967295, count = 0 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 4294967280, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 199007309732176, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 199007309725695, count = 6492 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 111477107367824, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 111477107342893, count = 24934 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 111477107342880, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121450642510224, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121450642499955, count = 10272 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121450642499952, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 35650244284304, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 35650244255805, count = 28515 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 35528778226320, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 35528778203731, count = 22601 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 35528778203728, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 44118729738928, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 44118729709645, count = 29285 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 44118729709632, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 35654476944544, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 35654476918595, count = 25956 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 109270199922864, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 109270199919971, count = 2898 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 109270199919968, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121380089654400, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121380089626904, count = 27503 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121380089626896, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 13238790227568, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 13238790218593, count = 8978 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 133540988372176, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 133540988347760, count = 24421 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 133540988347760, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121424907179424, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121424907149882, count = 29546 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121424907149872, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 48814256808672, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 48814256779888, count = 28793 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 23390391899024, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 23390391898899, count = 131 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 23390391898896, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 2 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 52983525039200, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 52983525026871, count = 12332 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 52966278390864, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 52966278377520, count = 13360 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 52966278377520, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 55182548283436, count = 12336 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 52983524777056, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 52983524765744, count = 11322 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6516 at fs/ext4/mballoc.c:1908 mb_free_blocks+0xe7c/0x1260 fs/ext4/mballoc.c:1908 Modules linked in: CPU: 1 UID: 0 PID: 6516 Comm: syz-executor309 Tainted: G B 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : mb_free_blocks+0xe7c/0x1260 fs/ext4/mballoc.c:1908 lr : mb_free_blocks+0xe7c/0x1260 fs/ext4/mballoc.c:1908 sp : ffff8000a40e72a0 x29: ffff8000a40e7320 x28: 0000000000000007 x27: 0000000000000000 x26: ffff0000e3b7b268 x25: ffff0000e3b7b268 x24: dfff800000000000 x23: ffff8000a40e7428 x22: dfff800000000000 x21: ffff0000dcfa26a4 x20: 0000000000000000 x19: ffff0000dcfa0000 x18: 1fffe000337e1476 x17: ffff80008f62e000 x16: ffff80008aecb65c x15: 0000000000000001 x14: 1fffe0001b9f44d4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001b9f44d5 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c8175b80 x7 : ffff8000a40e7424 x6 : ffff8000810f91a0 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000007 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: mb_free_blocks+0xe7c/0x1260 fs/ext4/mballoc.c:1908 (P) ext4_mb_clear_bb fs/ext4/mballoc.c:6519 [inline] ext4_free_blocks+0xf6c/0x18e4 fs/ext4/mballoc.c:6651 ext4_remove_blocks fs/ext4/extents.c:2551 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2716 [inline] ext4_ext_remove_space+0x1610/0x37c8 fs/ext4/extents.c:2965 ext4_ext_truncate+0x134/0x1d0 fs/ext4/extents.c:4484 ext4_truncate+0x9c4/0xfe0 fs/ext4/inode.c:4574 ext4_evict_inode+0x9b4/0x104c fs/ext4/inode.c:261 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1898 [inline] iput+0x6e4/0x83c fs/inode.c:1924 do_unlinkat+0x338/0x4dc fs/namei.c:4657 __do_sys_unlinkat fs/namei.c:4691 [inline] __se_sys_unlinkat fs/namei.c:4684 [inline] __arm64_sys_unlinkat+0xdc/0xf8 fs/namei.c:4684 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 23287 hardirqs last enabled at (23287): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (23287): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (23286): [] __el1_irq arch/arm64/kernel/entry-common.c:580 [inline] hardirqs last disabled at (23286): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:598 softirqs last enabled at (21110): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (21108): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 53955348821872, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 53955348795914, count = 25973 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 53955348795904, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 11349257057649, count = 808 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 11349257057648, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 130152096189904, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 130152096164961, count = 24948 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 130152096164960, count = 16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 274057454951360, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 274057454948322, count = 3041 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 187048375239104, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 187048375238123, count = 995 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 187048375238112, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 273782572856256, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 273782572850149, count = 6116 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 273782572850144, count = 16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121399102505152, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 121399102502003, count = 3154 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 107125092697296, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 107125092672877, count = 24421 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 107125092672864, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 11147376753520, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 11147376748813, count = 4709 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 11147376748800, count = 16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 32768, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 6, count = 32767 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 20 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 2240614592, count = 0 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 2240614592, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 146840636948479, count = 8928 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 32768, count = 16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 162744944121408, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 162744944116483, count = 4930 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 162744944116480, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 494727485440, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 494727479552, count = 5892 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 494727479552, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 4294255808, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 4294229272, count = 26540 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 30355232, count = 0 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 139685640869072, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 139685640864015, count = 5060 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281470681743360, count = 32768 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281474976743408, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281474976710655, count = 32767 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 244838905695904, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 244838905675775, count = 20141 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 305399552, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 305388640, count = 10923 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 20010252675755, count = 22496 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 10912, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 10913 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 64 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 33424, count = 16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 30317912, count = 0 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 188910748055552, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 188910748043273, count = 12291 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 8, count = 0 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 51539611440, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 51539607551, count = 3904 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 51539607536, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 0, count = 16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 70429001517213, count = 16640 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 17179152208, count = 23584 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 71468255809232, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 71468255805451, count = 3796 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 71468255805440, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 241750150690528, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 241750150666716, count = 23818 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 241750150666704, count = 16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 7308266, count = 0 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 7308256, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 523986010112, count = 6112 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281470681743360, count = 32768 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281474976743408, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281474976710655, count = 32767 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 244838905695904, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 244838905675775, count = 20141 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 105524727857488, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 105524727841024, count = 16475 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 105524727841024, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 217230362534192, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 217230362532889, count = 1315 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 247360067207408, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 247360067207229, count = 191 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 247360067207216, count = 16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281473147498488, count = 32768 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281474976743408, count = 16 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281474976710655, count = 32767 EXT4-fs error (device loop0): ext4_free_blocks:6587: comm syz-executor309: Freeing blocks not in datazone - block = 281470681743375, count = 0 --- 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.