Commit-ID: 4c47acd824aaaa8fc6dc519fb4e08d1522105b7a
Gitweb: https://git.kernel.org/tip/4c47acd824aaaa8fc6dc519fb4e08d1522105b7a
Author: Konstantin Khlebnikov <khlebni...@yandex-team.ru>
AuthorDate: Wed, 6 Mar 2019 20:11:42 +0300
Committer: Ingo Molnar <mi...@kernel.org>
CommitDate: Tue, 19 Mar 2019 12:06:15 +0100
sched/core: Fix buffer overflow in cgroup2 property cpu.max
Add limit into sscanf format string for on-stack buffer.
Signed-off-by: Konstantin Khlebnikov <khlebni...@yandex-team.ru>
Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Acked-by: Tejun Heo <t...@kernel.org>
Cc: Andy Lutomirski <l...@kernel.org>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Johannes Weiner <han...@cmpxchg.org>
Cc: Li Zefan <lize...@huawei.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Rik van Riel <r...@surriel.com>
Cc: Thomas Gleixner <t...@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 <mi...@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 6b2c055564b5..b7a4afdc33cb 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6943,7 +6943,7 @@ 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;
