cxl: Fix leaking pid refs in some error paths

[cascardo/linux.git] / drivers / misc / cxl / file.c

diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index d0b421f..77080cc 100644 (file)
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -193,6 +193,16 @@ static long afu_ioctl_start_work(struct cxl_context *ctx,
 
        ctx->mmio_err_ff = !!(work.flags & CXL_START_WORK_ERR_FF);
 
+       /*
+        * Increment the mapped context count for adapter. This also checks
+        * if adapter_context_lock is taken.
+        */
+       rc = cxl_adapter_context_get(ctx->afu->adapter);
+       if (rc) {
+               afu_release_irqs(ctx, ctx);
+               goto out;
+       }
+
        /*
         * We grab the PID here and not in the file open to allow for the case
         * where a process (master, some daemon, etc) has opened the chardev on
@@ -205,15 +215,6 @@ static long afu_ioctl_start_work(struct cxl_context *ctx,
        ctx->pid = get_task_pid(current, PIDTYPE_PID);
        ctx->glpid = get_task_pid(current->group_leader, PIDTYPE_PID);
 
-       /*
-        * Increment the mapped context count for adapter. This also checks
-        * if adapter_context_lock is taken.
-        */
-       rc = cxl_adapter_context_get(ctx->afu->adapter);
-       if (rc) {
-               afu_release_irqs(ctx, ctx);
-               goto out;
-       }
 
        trace_cxl_attach(ctx, work.work_element_descriptor, work.num_interrupts, amr);
 
@@ -221,6 +222,9 @@ static long afu_ioctl_start_work(struct cxl_context *ctx,
                                                        amr))) {
                afu_release_irqs(ctx, ctx);
                cxl_adapter_context_put(ctx->afu->adapter);
+               put_pid(ctx->glpid);
+               put_pid(ctx->pid);
+               ctx->glpid = ctx->pid = NULL;
                goto out;
        }