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X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrea Arcangeli , Laurent Vivier , Darren Kenny , sstabellini@kernel.org, pmatouse@redhat.com, mdroth@linux.vnet.ibm.com, qemu-block@nongnu.org, "Michael S . Tsirkin" , qemu-stable@nongnu.org, qemu-devel@nongnu.org, Kashyap Chamarthy , Thomas Huth , Paolo Bonzini , pjp@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 1/22/20 7:23 AM, Kevin Wolf wrote: > Am 22.01.2020 um 12:53 hat Alexander Popov geschrieben: >> On 23.12.2019 20:51, Alexander Popov wrote: >>> Fuzzing the Linux kernel with syzkaller allowed to find how to crash qemu >>> using a special SCSI_IOCTL_SEND_COMMAND. It hits the assertion in >>> ide_dma_cb() introduced in the commit a718978ed58a in July 2015. >>> >>> This patch series fixes incorrect handling of some PRDTs in ide_dma_cb() >>> and improves the ide-test to cover more PRDT cases (including one >>> that causes that particular qemu crash). >>> >>> Changes from v2 (thanks to Kevin Wolf for the feedback): >>> - the assertion about prepare_buf() return value is improved; >>> - the patch order is reversed to keep the tree bisectable; >>> - the unit-test performance is improved -- now it runs 8 seconds >>> instead of 3 minutes on my laptop. >>> >>> Alexander Popov (2): >>> ide: Fix incorrect handling of some PRDTs in ide_dma_cb() >>> tests/ide-test: Create a single unit-test covering more PRDT cases >>> >>> hw/ide/core.c | 30 +++++--- >>> tests/ide-test.c | 174 ++++++++++++++++++++--------------------------- >>> 2 files changed, 96 insertions(+), 108 deletions(-) >> >> Hello! >> >> Pinging again about this fix and unit-test... >> >> It's ready. Kevin Wolf has reviewed this (thanks a lot!). >> >> What is next? > > I asked John about it just yesterday (if he will merge it or if he would > prefer me to take it through my tree) and he promised to take a look > very soon. > > Kevin > Going to merge it today. --js