From: jianchunfu Date: Wed, 15 Jun 2022 07:33:48 +0000 (+0800) Subject: rtla/utils: Use calloc and check the potential memory allocation failure X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b5f37a0b6f667f5c72340ca9dcd7703f261cb981;p=linux.git rtla/utils: Use calloc and check the potential memory allocation failure Replace malloc with calloc and add memory allocating check of mon_cpus before used. Link: https://lkml.kernel.org/r/20220615073348.6891-1-jianchunfu@cmss.chinamobile.com Fixes: 7d0dc9576dc3 ("rtla/timerlat: Add --dma-latency option") Signed-off-by: jianchunfu Acked-by: Daniel Bristot de Oliveira Signed-off-by: Steven Rostedt (Google) --- diff --git a/tools/tracing/rtla/src/utils.c b/tools/tracing/rtla/src/utils.c index 5352167a1e751..5ae2fa96fde1e 100644 --- a/tools/tracing/rtla/src/utils.c +++ b/tools/tracing/rtla/src/utils.c @@ -106,8 +106,9 @@ int parse_cpu_list(char *cpu_list, char **monitored_cpus) nr_cpus = sysconf(_SC_NPROCESSORS_CONF); - mon_cpus = malloc(nr_cpus * sizeof(char)); - memset(mon_cpus, 0, (nr_cpus * sizeof(char))); + mon_cpus = calloc(nr_cpus, sizeof(char)); + if (!mon_cpus) + goto err; for (p = cpu_list; *p; ) { cpu = atoi(p);