Messages in this thread Patch in this message | | | From | Viresh Kumar <> | Subject | [PATCH] mailbox: arm_mhuv2: Skip calling kfree() with invalid pointer | Date | Mon, 22 Feb 2021 12:48:06 +0530 |
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It is possible that 'data' passed to kfree() is set to a error value instead of allocated space. Make sure it doesn't get called with invalid pointer.
Fixes: 5a6338cce9f4 ("mailbox: arm_mhuv2: Add driver") Cc: v5.11 <stable@vger.kernel.org> # v5.11 Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/mailbox/arm_mhuv2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mailbox/arm_mhuv2.c b/drivers/mailbox/arm_mhuv2.c index cdfb1939fabf..d997f8ebfa98 100644 --- a/drivers/mailbox/arm_mhuv2.c +++ b/drivers/mailbox/arm_mhuv2.c @@ -699,7 +699,9 @@ static irqreturn_t mhuv2_receiver_interrupt(int irq, void *arg) ret = IRQ_HANDLED; } - kfree(data); + if (!IS_ERR(data)) + kfree(data); + return ret; } -- 2.25.0.rc1.19.g042ed3e048af
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