bnxt_en: Adjust logging of firmware messages in case of released token in __hwrm_send()

In case of token is released due to token->state == BNXT_HWRM_DEFERRED,
released token (set to NULL) is used in log messages. This issue is
expected to be prevented by HWRM_ERR_CODE_PF_UNAVAILABLE error code. But
this error code is returned by recent firmware. So some firmware may not
return it. This may lead to NULL pointer dereference.
Adjust this issue by adding token pointer check.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 8fa4219dba8e ("bnxt_en: add dynamic debug support for HWRM messages")
Suggested-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Aleksandr Mishin <amishin@t-argos.ru>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20240611082547.12178-1-amishin@t-argos.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
index 1df3d56cc4b51340c8e363af73df1837421e5735..d2fd2d04ed474a419bfe90848fdc1d1da0899659 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c
@@ -680,7 +680,7 @@ static int __hwrm_send(struct bnxt *bp, struct bnxt_hwrm_ctx *ctx)
                            req_type);
        else if (rc && rc != HWRM_ERR_CODE_PF_UNAVAILABLE)
                hwrm_err(bp, ctx, "hwrm req_type 0x%x seq id 0x%x error 0x%x\n",
-                        req_type, token->seq_id, rc);
+                        req_type, le16_to_cpu(ctx->req->seq_id), rc);
        rc = __hwrm_to_stderr(rc);
 exit:
        if (token)