• Dexuan Cui's avatar
    Drivers: hv: vmbus: check the creation_status in vmbus_establish_gpadl() · eceb0596
    Dexuan Cui authored
    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: default avatarDexuan Cui <decui@microsoft.com>
    Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
channel.c 25.9 KB