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ipmi:ssif: Check for NULL msg when handling events and messages
[ Upstream commit 7602b95 ] Even though it's not possible to get into the SSIF_GETTING_MESSAGES and SSIF_GETTING_EVENTS states without a valid message in the msg field, it's probably best to be defensive here and check and print a log, since that means something else went wrong. Also add a default clause to that switch statement to release the lock and print a log, in case the state variable gets messed up somehow. Reported-by: Haowen Bai <baihaowen@meizu.com> Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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