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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 9194FC43603 for ; Sun, 8 Dec 2019 05:45:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6736020700 for ; Sun, 8 Dec 2019 05:45:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725832AbfLHFpK (ORCPT ); Sun, 8 Dec 2019 00:45:10 -0500 Received: from mail-io1-f71.google.com ([209.85.166.71]:42762 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id 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X-Received: by 2002:a5d:9eda:: with SMTP id a26mr17559388ioe.238.1575783909020; Sat, 07 Dec 2019 21:45:09 -0800 (PST) Date: Sat, 07 Dec 2019 21:45:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000023dba505992ac8aa@google.com> Subject: memory leak in fasync_helper From: syzbot To: bfields@fieldses.org, jlayton@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: bf929479 Merge branch 'for-linus' of git://git.kernel.org/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=123e91e2e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=874c75a332209d41 dashboard link: https://syzkaller.appspot.com/bug?extid=4b1fe8105f8044a26162 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=120faee2e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=178a0ef6e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+4b1fe8105f8044a26162@syzkaller.appspotmail.com BUG: memory leak unreferenced object 0xffff88812a4082a0 (size 48): comm "syz-executor670", pid 6989, jiffies 4294952355 (age 19.520s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00 .........F...... 00 00 00 00 00 00 00 00 00 6b 05 1f 81 88 ff ff .........k...... backtrace: [<000000002a74b343>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000002a74b343>] slab_post_alloc_hook mm/slab.h:586 [inline] [<000000002a74b343>] slab_alloc mm/slab.c:3319 [inline] [<000000002a74b343>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483 [<00000000fa370506>] fasync_alloc fs/fcntl.c:895 [inline] [<00000000fa370506>] fasync_add_entry fs/fcntl.c:953 [inline] [<00000000fa370506>] fasync_helper+0x37/0xa9 fs/fcntl.c:982 [<000000006c3eaaf1>] sock_fasync+0x4d/0xa0 net/socket.c:1293 [<0000000098076f55>] ioctl_fioasync fs/ioctl.c:550 [inline] [<0000000098076f55>] do_vfs_ioctl+0x409/0x810 fs/ioctl.c:655 [<00000000df24d2b9>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713 [<000000003fec9c80>] __do_sys_ioctl fs/ioctl.c:720 [inline] [<000000003fec9c80>] __se_sys_ioctl fs/ioctl.c:718 [inline] [<000000003fec9c80>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718 [<000000002bebbfe6>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290 [<00000000722d8431>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888128cdf240 (size 48): comm "syz-executor670", pid 6990, jiffies 4294952942 (age 13.650s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00 .........F...... 00 00 00 00 00 00 00 00 00 d8 02 19 81 88 ff ff ................ backtrace: [<000000002a74b343>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000002a74b343>] slab_post_alloc_hook mm/slab.h:586 [inline] [<000000002a74b343>] slab_alloc mm/slab.c:3319 [inline] [<000000002a74b343>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483 [<00000000fa370506>] fasync_alloc fs/fcntl.c:895 [inline] [<00000000fa370506>] fasync_add_entry fs/fcntl.c:953 [inline] [<00000000fa370506>] fasync_helper+0x37/0xa9 fs/fcntl.c:982 [<000000006c3eaaf1>] sock_fasync+0x4d/0xa0 net/socket.c:1293 [<0000000098076f55>] ioctl_fioasync fs/ioctl.c:550 [inline] [<0000000098076f55>] do_vfs_ioctl+0x409/0x810 fs/ioctl.c:655 [<00000000df24d2b9>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713 [<000000003fec9c80>] __do_sys_ioctl fs/ioctl.c:720 [inline] [<000000003fec9c80>] __se_sys_ioctl fs/ioctl.c:718 [inline] [<000000003fec9c80>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718 [<000000002bebbfe6>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290 [<00000000722d8431>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888128cdff60 (size 48): comm "syz-executor670", pid 6991, jiffies 4294953529 (age 7.780s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 01 46 00 00 03 00 00 00 .........F...... 00 00 00 00 00 00 00 00 00 63 05 1f 81 88 ff ff .........c...... backtrace: [<000000002a74b343>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000002a74b343>] slab_post_alloc_hook mm/slab.h:586 [inline] [<000000002a74b343>] slab_alloc mm/slab.c:3319 [inline] [<000000002a74b343>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483 [<00000000fa370506>] fasync_alloc fs/fcntl.c:895 [inline] [<00000000fa370506>] fasync_add_entry fs/fcntl.c:953 [inline] [<00000000fa370506>] fasync_helper+0x37/0xa9 fs/fcntl.c:982 [<000000006c3eaaf1>] sock_fasync+0x4d/0xa0 net/socket.c:1293 [<0000000098076f55>] ioctl_fioasync fs/ioctl.c:550 [inline] [<0000000098076f55>] do_vfs_ioctl+0x409/0x810 fs/ioctl.c:655 [<00000000df24d2b9>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713 [<000000003fec9c80>] __do_sys_ioctl fs/ioctl.c:720 [inline] [<000000003fec9c80>] __se_sys_ioctl fs/ioctl.c:718 [inline] [<000000003fec9c80>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718 [<000000002bebbfe6>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290 [<00000000722d8431>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches