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mmc: core: Fix NULL ptr crash from mmc_should_fail_request 

In case of CQHCI, mrq->cmd may be NULL for data requests (non DCMD).
In such case mmc_should_fail_request is directly dereferencing
mrq->cmd while cmd is NULL.
Fix this by checking for mrq->cmd pointer.

Fixes: 72a5af554d ("mmc: core: Add support for handling CQE requests")
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ritesh Harjani 2019-02-22 19:21:34 +05:30 committed by Ulf Hansson
parent 5603731a15
commit e5723f95d6
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/core/core.c
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@ -95,7 +95,7 @@ static void mmc_should_fail_request(struct mmc_host *host,
if (!data)
return;
if (cmd->error || data->error ||
if ((cmd && cmd->error) || data->error ||
!should_fail(&host->fail_mmc_request, data->blksz * data->blocks))
return;