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Thu, 22 Oct 2026 19:31:25 -0700 (PDT) Received: from localhost.localdomain ([240e:46c:1d00:19d6:7438:ad54:9ef4:bc36]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cd8ba89a40fsm279852a12.14.2026.10.22.19.31.18 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 22 Oct 2026 19:31:24 -0700 (PDT) From: Yafang Shao To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, kprateek.nayak@amd.com, gourry@gourry.net, david@kernel.org, tim.c.chen@linux.intel.com, yu.c.chen@intel.com Cc: linux-kernel@vger.kernel.org, Yafang Shao , stable@vger.kernel.org Subject: [PATCH 1/2] sched: fix stale get_pref_llc() stub for !CONFIG_SCHED_CACHE Date: Fri, 23 Oct 2026 10:31:04 +0800 Message-ID: <20261023023105.28829-2-laoar.shao@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20261023023105.28829-1-laoar.shao@gmail.com> References: <20261023023105.28829-1-laoar.shao@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Commit b636fef85bda ("sched/cache: Introduce task_struct->sched_cache_grp to fix UAF") switched get_pref_llc() from taking a struct mm_struct * to taking the task's struct sched_cache_group *, but only updated the CONFIG_SCHED_CACHE definition and its caller: the stub in the !CONFIG_SCHED_CACHE branch kept the old mm_struct parameter. Fixes: b636fef85bda ("sched/cache: Introduce task_struct->sched_cache_grp to fix UAF") Cc: #v7.2.x Signed-off-by: Yafang Shao Reviewed-by: Gregory Price (Meta) Reviewed-by: Chen Yu Reviewed-by: Tim Chen --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 57360f5cdde4..973647ad6c2d 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2194,7 +2194,7 @@ void init_sched_mm(struct task_struct *p) { } static void task_tick_cache(struct rq *rq, struct task_struct *p) { } static inline int get_pref_llc(struct task_struct *p, - struct mm_struct *mm) + struct sched_cache_group *grp) { return -1; } -- 2.52.0