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From: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
To: axboe@kernel.dk
Cc: linux-block@vger.kernel.org, io-uring@vger.kernel.org
Subject: [PATCH 0/1] block: Manage bio references so the bio persists until necessary
Date: Thu, 30 Jan 2020 19:23:41 -0800	[thread overview]
Message-ID: <1580441022-59129-1-git-send-email-bijan.mottahedeh@oracle.com> (raw)

This patch addresses a bio reference count problem encountered while
debugging a different, use-after-free bug with the fio test below.

The original use-after-free bug is still hit however.

[global]
filename=/dev/nvme0n1
rw=randread
bs=4k
direct=1
time_based=1
randrepeat=1
gtod_reduce=1
[fiotest]


fio nvme.fio --readonly --ioengine=io_uring --iodepth 1024 --fixedbufs 
--hipri --numjobs=$1 --runtime=$2

Bijan Mottahedeh (1):
  block: Manage bio references so the bio persists until necessary

 fs/block_dev.c | 78 ++++++++++++++++++++++++++++++----------------------------
 1 file changed, 40 insertions(+), 38 deletions(-)

-- 
1.8.3.1


             reply	other threads:[~2020-01-31  3:24 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-31  3:23 Bijan Mottahedeh [this message]
2020-01-31  3:23 ` [PATCH 1/1] block: Manage bio references so the bio persists until necessary Bijan Mottahedeh
2020-01-31  6:42   ` Christoph Hellwig
2020-01-31 18:08     ` Bijan Mottahedeh
2020-02-03  8:34       ` Christoph Hellwig
2020-02-03 21:07         ` Bijan Mottahedeh
2020-02-04  7:51           ` Christoph Hellwig
2020-02-04 20:59             ` Jens Axboe
2020-02-04 22:41               ` Bijan Mottahedeh
2020-02-24 23:32               ` Bijan Mottahedeh

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