Mauro Carvalho Chehab ba9cf6b430 media: pulse8-cec: fix data timestamp at pulse8_setup() ... As pointed by Coverity, there is a hidden overflow condition there. As date is signed and u8 is unsigned, doing: date = (data[0] << 24) With a value bigger than 07f will make all upper bits of date 0xffffffff. This can be demonstrated with this small code: <code> typedef int64_t time64_t; typedef uint8_t u8; int main(void) { u8 data[] = { 0xde ,0xad , 0xbe, 0xef }; time64_t date; date = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3]; printf("Invalid data = 0x%08lx\n", date); date = ((unsigned)data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3]; printf("Expected data = 0x%08lx\n", date); return 0; } </code> Fix it by converting the upper bit calculation to unsigned. Fixes: cea28e7a55 ("media: pulse8-cec: reorganize function order") Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>		2024-10-18 10:43:03 +02:00
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pulse8-cec.c	media: pulse8-cec: fix data timestamp at pulse8_setup()	2024-10-18 10:43:03 +02:00