From 010764b8856e5ee5056113704dc4b914ebc88f1d Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Wed, 21 Aug 2019 10:14:03 +0300 Subject: tools/power/x86/intel-speed-select: Fix a read overflow in isst_set_tdp_level_msr() The isst_send_msr_command() function will read 8 bytes but we are passing an address to an int (4 bytes) so it results in a read overflow. Fixes: 3fb4f7cd472c ("tools/power/x86: A tool to validate Intel Speed Select commands") Signed-off-by: Dan Carpenter Acked-by: Srinivas Pandruvada Signed-off-by: Andy Shevchenko --- tools/power/x86/intel-speed-select/isst-core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tools/power') diff --git a/tools/power/x86/intel-speed-select/isst-core.c b/tools/power/x86/intel-speed-select/isst-core.c index 8de4ac39a008..f724322856ed 100644 --- a/tools/power/x86/intel-speed-select/isst-core.c +++ b/tools/power/x86/intel-speed-select/isst-core.c @@ -190,6 +190,7 @@ int isst_get_get_trl(int cpu, int level, int avx_level, int *trl) int isst_set_tdp_level_msr(int cpu, int tdp_level) { + unsigned long long level = tdp_level; int ret; debug_printf("cpu: tdp_level via MSR %d\n", cpu, tdp_level); @@ -202,8 +203,7 @@ int isst_set_tdp_level_msr(int cpu, int tdp_level) if (tdp_level > 2) return -1; /* invalid value */ - ret = isst_send_msr_command(cpu, 0x64b, 1, - (unsigned long long *)&tdp_level); + ret = isst_send_msr_command(cpu, 0x64b, 1, &level); if (ret) return ret; -- cgit v1.2.3-59-g8ed1b