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| author | Andrea Parri (Microsoft) <parri.andrea@gmail.com> | 2020-12-11 14:14:04 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-12-11 09:56:17 -0500 |
| commit | 4da3a54f5a025846f9930354cfb80f075b9952e0 (patch) | |
| tree | 8a38786ba8616f67f43b659c4a309545a3fa9d9a /drivers | |
| parent | 359db63378eded1ee9c8c9ad72245f9b0158ae95 (diff) | |
| download | linux-4da3a54f5a025846f9930354cfb80f075b9952e0.tar.bz2 | |
Revert "scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback()"
This reverts commit 3b8c72d076c42bf27284cda7b2b2b522810686f8.
Dexuan reported a regression where StorVSC fails to probe a device (and
where, consequently, the VM may fail to boot). The root-cause analysis led
to a long-standing race condition that is exposed by the validation /commit
in question. Let's put the new validation aside until a proper solution
for that race condition is in place.
Link: https://lore.kernel.org/r/20201211131404.21359-1-parri.andrea@gmail.com
Fixes: 3b8c72d076c4 ("scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback()")
Cc: Dexuan Cui <decui@microsoft.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/storvsc_drv.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 99c8ff81de74..ded00a89bfc4 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1246,11 +1246,6 @@ static void storvsc_on_channel_callback(void *context) request = (struct storvsc_cmd_request *) ((unsigned long)desc->trans_id); - if (hv_pkt_datalen(desc) < sizeof(struct vstor_packet) - vmscsi_size_delta) { - dev_err(&device->device, "Invalid packet len\n"); - continue; - } - if (request == &stor_device->init_request || request == &stor_device->reset_request) { memcpy(&request->vstor_packet, packet, |