git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-18 03:23:53 -04:00
Code Issues Packages Projects Releases Wiki Activity

hv_sock: Add validation for untrusted Hyper-V values

Browse Source 
For additional robustness in the face of Hyper-V errors or malicious
behavior, validate all values that originate from packets that Hyper-V
has sent to the guest in the host-to-guest ring buffer.  Ensure that
invalid values cannot cause data being copied out of the bounds of the
source buffer in hvs_stream_dequeue().

Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20220428145107.7878-4-parri.andrea@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Andrea Parri (Microsoft)
2022-04-28 16:51:05 +02:00
committed by Wei Liu
parent 066f3377fb
commit dbde6d0c7a
2 changed files with 13 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/hyperv.h
View File

@@ -1696,6 +1696,11 @@ static inline u32 hv_pkt_datalen(const struct vmpacket_descriptor *desc)
return (desc->len8 << 3) - (desc->offset8 << 3);
}
/* Get packet length associated with descriptor */
static inline u32 hv_pkt_len(const struct vmpacket_descriptor *desc)
{
return desc->len8 << 3;
}
struct vmpacket_descriptor *
hv_pkt_iter_first_raw(struct vmbus_channel *channel);