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=-0.4 required=3.0 tests=FROM_LOCAL_DIGITS, FROM_LOCAL_HEX,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no 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 CB0A0C43331 for ; Tue, 31 Mar 2020 17:11:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 99F0C20848 for ; Tue, 31 Mar 2020 17:11:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730677AbgCaRLR (ORCPT ); Tue, 31 Mar 2020 13:11:17 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:40143 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP 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X-Received: by 2002:a02:c551:: with SMTP id g17mr7773176jaj.52.1585674675789; Tue, 31 Mar 2020 10:11:15 -0700 (PDT) Date: Tue, 31 Mar 2020 10:11:15 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c7a80905a229a785@google.com> Subject: memory leak in nbd_add_socket From: syzbot To: axboe@kernel.dk, josef@toxicpanda.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 673b41e0 staging/octeon: fix up merge error git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15badadbe00000 kernel config: https://syzkaller.appspot.com/x/.config?x=d97026d04c648459 dashboard link: https://syzkaller.appspot.com/bug?extid=934037347002901b8d2a compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12dbb747e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14421b9de00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+934037347002901b8d2a@syzkaller.appspotmail.com BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.060s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.170s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.270s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.380s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.480s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.590s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.690s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd584a0 (size 32): comm "syz-executor586", pid 8424, jiffies 4294961663 (age 40.800s) hex dump (first 32 bytes): 2f 64 65 76 2f 6e 62 64 30 00 00 00 00 00 00 00 /dev/nbd0....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000090cb73c8>] __do_krealloc mm/slab_common.c:1671 [inline] [<0000000090cb73c8>] krealloc+0x7c/0xa0 mm/slab_common.c:1700 [<00000000cf9e6ba7>] nbd_add_socket+0x7d/0x1e0 drivers/block/nbd.c:1040 [<0000000040a0a881>] __nbd_ioctl drivers/block/nbd.c:1373 [inline] [<0000000040a0a881>] nbd_ioctl+0x175/0x430 drivers/block/nbd.c:1437 [<000000004972a55a>] __blkdev_driver_ioctl block/ioctl.c:322 [inline] [<000000004972a55a>] blkdev_ioctl+0x147/0x300 block/ioctl.c:718 [<000000008903d911>] block_ioctl+0x50/0x70 fs/block_dev.c:1995 [<00000000c37950d9>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000c37950d9>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763 [<00000000ffe4bbdc>] __do_sys_ioctl fs/ioctl.c:772 [inline] [<00000000ffe4bbdc>] __se_sys_ioctl fs/ioctl.c:770 [inline] [<00000000ffe4bbdc>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770 [<00000000ede38b98>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294 [<00000000553f73d5>] 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