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| author | Etienne Carriere <etienne.carriere@linaro.org> | 2023-04-20 09:49:23 +0200 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2023-04-20 14:52:25 +0200 |
| commit | 654d0310007146fae87b0c1a68f81e53ad519b14 (patch) | |
| tree | a337fda6c8e74dfe41e95f83ae432c8f1956f30b /drivers/tee | |
| parent | eeac8ede17557680855031c6f305ece2378af326 (diff) | |
| download | lwn-654d0310007146fae87b0c1a68f81e53ad519b14.tar.gz lwn-654d0310007146fae87b0c1a68f81e53ad519b14.zip | |
optee: fix uninited async notif value
Fixes an uninitialized variable in irq_handler() that could lead to
unpredictable behavior in case OP-TEE fails to handle SMC function ID
OPTEE_SMC_GET_ASYNC_NOTIF_VALUE. This change ensures that in that case
get_async_notif_value() properly reports there are no notification
event.
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202304200755.OoiuclDZ-lkp@intel.com/
Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/all/d9b7f69b-c737-4cb3-8e74-79fe00c934f9@kili.mountain/
Fixes: 6749e69c4dad ("optee: add asynchronous notifications")
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee')
| -rw-r--r-- | drivers/tee/optee/smc_abi.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c index a1c1fa1a9c28..e6e0428f8e7b 100644 --- a/drivers/tee/optee/smc_abi.c +++ b/drivers/tee/optee/smc_abi.c @@ -984,8 +984,10 @@ static u32 get_async_notif_value(optee_invoke_fn *invoke_fn, bool *value_valid, invoke_fn(OPTEE_SMC_GET_ASYNC_NOTIF_VALUE, 0, 0, 0, 0, 0, 0, 0, &res); - if (res.a0) + if (res.a0) { + *value_valid = false; return 0; + } *value_valid = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID); *value_pending = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING); return res.a1; |