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 X-Spam-Level: X-Spam-Status: No, score=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA61AC433DB for ; Mon, 22 Feb 2021 09:46:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A93A64E44 for ; Mon, 22 Feb 2021 09:46:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230205AbhBVJp4 (ORCPT ); Mon, 22 Feb 2021 04:45:56 -0500 Received: from mail-io1-f71.google.com ([209.85.166.71]:56089 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230312AbhBVJpC (ORCPT ); Mon, 22 Feb 2021 04:45:02 -0500 Received: by mail-io1-f71.google.com with SMTP id s5so1905795ioc.22 for ; Mon, 22 Feb 2021 01:44:46 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=sRSCXXLsLWScZcV2GmQdhJ4oAzh+7mRFWLA+pAoZM5g=; b=Gec2N+jaaolfp06Fzq6DuxUKARAAO28LxstGQG7I80PIRbHtkTlbv34lqtZBl9S4OG SjMhDotOCzqPoq9tsv5c9TRjjNtj+ap4as1SGRy7mhu4ejA/FOlXWyQ3ZVuXdbrpadUO M7wyMcb5i9lfW+m2gSzmclzXNP5mAHs/sZQDBKG1XgHX+lBkij7L+kU/1wAWUJFGkykb dthCY1V/qSxjcOD8gQNQ86Jyx+h5fvMn1gxvItic6Y2kJ7xxxAOQNW8AJktcpq9nAhHy uy5dr9RWpC8CnlTshQaq7HIO2x3XqDefosjq4PH5TF2DpSc0aYSk3mMO8c4HkcAIeHyK a6lQ== X-Gm-Message-State: AOAM533K68wmzfwVPegmFaAPrfadgpCROwOAPz+cmqV2InV1rMvXUWIK Fhwe7Y4aNqizECryeRHagrZFWM1CQ4gkTRMJOVvWmL2vcUWb X-Google-Smtp-Source: ABdhPJxD++H36CqpT/ewBnXlM/rGUgIrB8psiXFHsxchOpCZzo1S041vEtSvVA/OwV+h7clEtw7YD/oruAjqzjjE6lGec9U87XHP MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1381:: with SMTP id d1mr3514145ilo.45.1613987061399; Mon, 22 Feb 2021 01:44:21 -0800 (PST) Date: Mon, 22 Feb 2021 01:44:21 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007786a205bbe9a5d6@google.com> Subject: KASAN: invalid-free in io_req_caches_free From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 31caf8b2 Merge branch 'linus' of git://git.kernel.org/pub/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15a8afa6d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=5a8f3a57fabb4015 dashboard link: https://syzkaller.appspot.com/bug?extid=30b4936dcdb3aafa4fb4 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+30b4936dcdb3aafa4fb4@syzkaller.appspotmail.com ================================================================== BUG: KASAN: double-free or invalid-free in io_req_caches_free.constprop.0+0x3ce/0x530 fs/io_uring.c:8709 CPU: 1 PID: 243 Comm: kworker/u4:6 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound io_ring_exit_work Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xfa/0x151 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2c6 mm/kasan/report.c:230 kasan_report_invalid_free+0x51/0x80 mm/kasan/report.c:355 ____kasan_slab_free+0xcc/0xe0 mm/kasan/common.c:341 kasan_slab_free include/linux/kasan.h:192 [inline] __cache_free mm/slab.c:3424 [inline] kmem_cache_free_bulk+0x4b/0x1b0 mm/slab.c:3744 io_req_caches_free.constprop.0+0x3ce/0x530 fs/io_uring.c:8709 io_ring_ctx_free fs/io_uring.c:8764 [inline] io_ring_exit_work+0x518/0x6b0 fs/io_uring.c:8846 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Allocated by task 11900: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:401 [inline] ____kasan_kmalloc.constprop.0+0x7f/0xa0 mm/kasan/common.c:429 kasan_slab_alloc include/linux/kasan.h:209 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] kmem_cache_alloc_bulk+0x2c2/0x460 mm/slab.c:3534 io_alloc_req fs/io_uring.c:2014 [inline] io_submit_sqes+0x18e8/0x2b60 fs/io_uring.c:6915 __do_sys_io_uring_enter+0x1154/0x1f50 fs/io_uring.c:9454 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 11900: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:356 ____kasan_slab_free+0xb0/0xe0 mm/kasan/common.c:362 kasan_slab_free include/linux/kasan.h:192 [inline] __cache_free mm/slab.c:3424 [inline] kmem_cache_free_bulk+0x4b/0x1b0 mm/slab.c:3744 io_req_caches_free.constprop.0+0x3ce/0x530 fs/io_uring.c:8709 io_uring_flush+0x483/0x6e0 fs/io_uring.c:9237 filp_close+0xb4/0x170 fs/open.c:1286 close_files fs/file.c:403 [inline] put_files_struct fs/file.c:418 [inline] put_files_struct+0x1d0/0x350 fs/file.c:415 exit_files+0x7e/0xa0 fs/file.c:435 do_exit+0xc27/0x2ae0 kernel/exit.c:820 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x42c/0x2100 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888012eaae00 which belongs to the cache io_kiocb of size 208 The buggy address is located 0 bytes inside of 208-byte region [ffff888012eaae00, ffff888012eaaed0) The buggy address belongs to the page: page:0000000091458aed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12eaa flags: 0xfff00000000200(slab) raw: 00fff00000000200 ffff8880188dcd50 ffff8880188dcd50 ffff888141b4ff00 raw: 0000000000000000 ffff888012eaa040 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888012eaad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888012eaad80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888012eaae00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888012eaae80: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ffff888012eaaf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.