Commit-ID: 5105fa52df1f249f996308188dd1e85c3ae62de5 Gitweb: https://git.kernel.org/tip/5105fa52df1f249f996308188dd1e85c3ae62de5 Author: Konstantin Khlebnikov <[email protected]> AuthorDate: Wed, 6 Mar 2019 20:11:42 +0300 Committer: Ingo Molnar <[email protected]> CommitDate: Sat, 9 Mar 2019 14:03:51 +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 <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Tejun Heo <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Dave Hansen <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Li Zefan <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Thomas Gleixner <[email protected]> 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 <[email protected]> --- 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;
