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| author | Andrea Parri (Microsoft) <parri.andrea@gmail.com> | 2020-11-18 15:53:48 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-11-30 23:24:10 -0500 |
| commit | 3b8c72d076c42bf27284cda7b2b2b522810686f8 (patch) | |
| tree | bb198bd29de7e3aa2337dc821a755139bb8f4c93 /drivers/scsi/storvsc_drv.c | |
| parent | 6112ff4e8f393e7e297dff04eff0987f94d37fa1 (diff) | |
| download | linux-3b8c72d076c42bf27284cda7b2b2b522810686f8.tar.bz2 | |
scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback()
Check that the packet is of the expected size at least, don't copy data
past the packet.
Link: https://lore.kernel.org/r/20201118145348.109879-1-parri.andrea@gmail.com
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Reported-by: Saruhan Karademir <skarade@microsoft.com>
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/storvsc_drv.c')
| -rw-r--r-- | drivers/scsi/storvsc_drv.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index ded00a89bfc4..99c8ff81de74 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1246,6 +1246,11 @@ 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, |