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sched: fix stale get_pref_llc() stub for !CONFIG_SCHED_CACHE

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Commit b636fef85b ("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: b636fef85b ("sched/cache: Introduce task_struct->sched_cache_grp to fix UAF")
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Gregory Price (Meta) <gourry@gourry.net>
Reviewed-by: Chen Yu <yu.c.chen@intel.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Cc: <stable@vger.kernel.org> #v7.2.x
Link: https://patch.msgid.link/20261023023105.28829-2-laoar.shao@gmail.com
This commit is contained in:
Yafang Shao 2026-10-23 10:31:04 +08:00 committed by Peter Zijlstra
parent ee92b7ef4c
commit cac037a85c
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/fair.c
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@ -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;
}