This is a note to let you know that I've just added the patch titled rtla/utils: Use calloc and check the potential memory allocation failure to the 5.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: rtla-utils-use-calloc-and-check-the-potential-memory.patch and it can be found in the queue-5.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 8b9bd85fc75cc7329a607fe0d81a66eaca0b4155 Author: jianchunfu <jianchunfu@xxxxxxxxxxxxxxxxxxxx> Date: Wed Jun 15 15:33:48 2022 +0800 rtla/utils: Use calloc and check the potential memory allocation failure [ Upstream commit b5f37a0b6f667f5c72340ca9dcd7703f261cb981 ] Replace malloc with calloc and add memory allocating check of mon_cpus before used. Link: https://lkml.kernel.org/r/20220615073348.6891-1-jianchunfu@xxxxxxxxxxxxxxxxxxxx Fixes: 7d0dc9576dc3 ("rtla/timerlat: Add --dma-latency option") Signed-off-by: jianchunfu <jianchunfu@xxxxxxxxxxxxxxxxxxxx> Acked-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx> Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/tools/tracing/rtla/src/utils.c b/tools/tracing/rtla/src/utils.c index 5352167a1e75..5ae2fa96fde1 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);