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scx: fix NULL pointer dereference with scx_exit_info #129

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Jan 28, 2024
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scx: fix NULL pointer dereference with scx_exit_info #129

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5 changes: 3 additions & 2 deletions kernel/sched/ext.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3614,13 +3614,13 @@ static int scx_ops_enable(struct sched_ext_ops *ops)
scx_create_rt_helper("sched_ext_ops_helper"));
if (!scx_ops_helper) {
ret = -ENOMEM;
goto err;
goto err_unlock;
}
}

if (scx_ops_enable_state() != SCX_OPS_DISABLED) {
ret = -EBUSY;
goto err;
goto err_unlock;
}

scx_exit_info = alloc_exit_info();
Expand Down Expand Up @@ -3868,6 +3868,7 @@ static int scx_ops_enable(struct sched_ext_ops *ops)
free_exit_info(scx_exit_info);
scx_exit_info = NULL;
}
err_unlock:
mutex_unlock(&scx_ops_enable_mutex);
return ret;

Expand Down