sched_ext: Fix scx_kick_pseqs corruption on concurrent scheduler loads

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If we load a BPF scheduler while another scheduler is already running,
alloc_kick_pseqs() would be called again, overwriting the previously
allocated arrays.

Fix by moving the alloc_kick_pseqs() call after the scx_enable_state()
check, ensuring that the arrays are only allocated when a scheduler can
actually be loaded.

Fixes: 14c1da3895 ("sched_ext: Allocate scx_kick_cpus_pnt_seqs lazily using kvzalloc()")
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Andrea Righi 2025-10-13 22:36:34 +02:00 • committed by Tejun Heo

parent 14c1da3895

commit 05e63305c8

1 changed files with 5 additions and 5 deletions

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kernel/sched/ext.c

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