linux

iv/linux

History

Mohammed Gamal 1eb65c8687 Drivers: vmbus: Check for channel allocation before looking up relids

relid2channel() assumes vmbus channel array to be allocated when called.
However, in cases such as kdump/kexec, not all relids will be reset by the host.
When the second kernel boots and if the guest receives a vmbus interrupt during
vmbus driver initialization before vmbus_connect() is called, before it finishes,
or if it fails, the vmbus interrupt service routine is called which in turn calls
relid2channel() and can cause a null pointer dereference.

Print a warning and error out in relid2channel() for a channel id that's invalid
in the second kernel.

Fixes: 8b6a877c060e ("Drivers: hv: vmbus: Replace the per-CPU channel lists with a global array of channels")

Signed-off-by: Mohammed Gamal <mgamal@redhat.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Link: https://lore.kernel.org/r/20230217204411.212709-1-mgamal@redhat.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

2023-03-06 15:28:03 +00:00

channel_mgmt.c

Drivers: hv: vmbus: fix double free in the error path of vmbus_add_channel_work()

2022-11-21 10:57:41 +00:00

channel.c

Drivers: hv: vmbus: Introduce {lock,unlock}_requestor()

2022-04-25 15:51:13 +00:00

connection.c

Drivers: vmbus: Check for channel allocation before looking up relids

2023-03-06 15:28:03 +00:00

hv_balloon.c

hyperv-next for v6.3.