linux

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Dexuan Cui eceb059654 Drivers: hv: vmbus: check the creation_status in vmbus_establish_gpadl()

This is a longstanding issue: if the vmbus upper-layer drivers try to
consume too many GPADLs, the host may return with an error
0xC0000044 (STATUS_QUOTA_EXCEEDED), but currently we forget to check
the creation_status, and hence we can pass an invalid GPADL handle
into the OPEN_CHANNEL message, and get an error code 0xc0000225 in
open_info->response.open_result.status, and finally we hang in
vmbus_open() -> "goto error_free_info" -> vmbus_teardown_gpadl().

With this patch, we can exit gracefully on STATUS_QUOTA_EXCEEDED.

Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-11-26 20:33:56 +01:00

channel_mgmt.c

Drivers: hv: vmbus: Use cpumask_var_t for on-stack cpu mask

2018-10-02 15:37:01 -07:00

channel.c

Drivers: hv: vmbus: check the creation_status in vmbus_establish_gpadl()

2018-11-26 20:33:56 +01:00

connection.c

Drivers: hv: vmbus: Use get/put_cpu() in vmbus_connect()

2018-09-30 08:49:55 -07:00

hv_balloon.c

hv_balloon: Replace spin_is_locked() with lockdep