[ Upstream commit 4c47acd824aaaa8fc6dc519fb4e08d1522105b7a ]
Add limit into sscanf format string for on-stack buffer.
Signed-off-by: Konstantin Khlebnikov khlebnikov@yandex-team.ru Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Acked-by: Tejun Heo tj@kernel.org Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@alien8.de Cc: Dave Hansen dave.hansen@linux.intel.com Cc: H. Peter Anvin hpa@zytor.com Cc: Johannes Weiner hannes@cmpxchg.org Cc: Li Zefan lizefan@huawei.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Rik van Riel riel@surriel.com Cc: Thomas Gleixner tglx@linutronix.de Fixes: 0d5936344f30 ("sched: Implement interface for cgroup unified hierarchy") Link: https://lkml.kernel.org/r/155189230232.2620.13120481613524200065.stgit@buzz Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/sched/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 01a2489de94e..62cc29364fba 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6942,7 +6942,7 @@ static int __maybe_unused cpu_period_quota_parse(char *buf, { char tok[21]; /* U64_MAX */
- if (!sscanf(buf, "%s %llu", tok, periodp)) + if (sscanf(buf, "%20s %llu", tok, periodp) < 1) return -EINVAL;
*periodp *= NSEC_PER_USEC;