iwlwifi: mvm: fix unaligned read of rx_pkt_status
[ Upstream commit c5aaa8be29
]
This is present since the introduction of iwlmvm.
Example stack trace on MIPS:
[<ffffffffc0789328>] iwl_mvm_rx_rx_mpdu+0xa8/0xb88 [iwlmvm]
[<ffffffffc0632b40>] iwl_pcie_rx_handle+0x420/0xc48 [iwlwifi]
Tested with a Wireless AC 7265 for ~6 months, confirmed to fix the
problem. No other unaligned accesses are spotted yet.
Signed-off-by: Wang Xuerui <wangxuerui@qiniu.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
47a417e7cf
commit
f8ce363e5a
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@ -60,6 +60,7 @@
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#include <asm/unaligned.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include "iwl-trans.h"
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@ -357,7 +358,7 @@ void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
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rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
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hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
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len = le16_to_cpu(rx_res->byte_count);
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rx_pkt_status = le32_to_cpup((__le32 *)
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rx_pkt_status = get_unaligned_le32((__le32 *)
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(pkt->data + sizeof(*rx_res) + len));
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/* Dont use dev_alloc_skb(), we'll have enough headroom once
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