5.4-stable review patch. If anyone has any objections, please let me know.
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From: Andrey Vatoropin a.vatoropin@crpt.ru
[ Upstream commit 8df0f002827e18632dcd986f7546c1abf1953a6f ]
The expression PCC_NUM_RETRIES * pcc_chan->latency is currently being evaluated using 32-bit arithmetic.
Since a value of type 'u64' is used to store the eventual result, and this result is later sent to the function usecs_to_jiffies with input parameter unsigned int, the current data type is too wide to store the value of ctx->usecs_lat.
Change the data type of "usecs_lat" to a more suitable (narrower) type.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Andrey Vatoropin a.vatoropin@crpt.ru Link: https://lore.kernel.org/r/20250204095400.95013-1-a.vatoropin@crpt.ru Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hwmon/xgene-hwmon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwmon/xgene-hwmon.c b/drivers/hwmon/xgene-hwmon.c index 559a73bab51e8..15889bcc85875 100644 --- a/drivers/hwmon/xgene-hwmon.c +++ b/drivers/hwmon/xgene-hwmon.c @@ -110,7 +110,7 @@ struct xgene_hwmon_dev {
phys_addr_t comm_base_addr; void *pcc_comm_addr; - u64 usecs_lat; + unsigned int usecs_lat; };
/*