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Date: Tue, 7 Jun 2022 19:02:24 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Miaoqian Lin <linmq006@...il.com>, Cédric Le Goater <clg@...d.org>, Michael Ellerman <mpe@...erman.id.au>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.17 552/772] powerpc/xive: Fix refcount leak in xive_spapr_init From: Miaoqian Lin <linmq006@...il.com> [ Upstream commit 1d1fb9618bdd5a5fbf9a9eb75133da301d33721c ] of_find_compatible_node() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. Add missing of_node_put() to avoid refcount leak. Fixes: eac1e731b59e ("powerpc/xive: guest exploitation of the XIVE interrupt controller") Signed-off-by: Miaoqian Lin <linmq006@...il.com> Reviewed-by: Cédric Le Goater <clg@...d.org> Signed-off-by: Michael Ellerman <mpe@...erman.id.au> Link: https://lore.kernel.org/r/20220512090535.33397-1-linmq006@gmail.com Signed-off-by: Sasha Levin <sashal@...nel.org> --- arch/powerpc/sysdev/xive/spapr.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c index 29456c255f9f..503f544d28e2 100644 --- a/arch/powerpc/sysdev/xive/spapr.c +++ b/arch/powerpc/sysdev/xive/spapr.c @@ -830,12 +830,12 @@ bool __init xive_spapr_init(void) /* Resource 1 is the OS ring TIMA */ if (of_address_to_resource(np, 1, &r)) { pr_err("Failed to get thread mgmnt area resource\n"); - return false; + goto err_put; } tima = ioremap(r.start, resource_size(&r)); if (!tima) { pr_err("Failed to map thread mgmnt area\n"); - return false; + goto err_put; } if (!xive_get_max_prio(&max_prio)) @@ -871,6 +871,7 @@ bool __init xive_spapr_init(void) if (!xive_core_init(np, &xive_spapr_ops, tima, TM_QW1_OS, max_prio)) goto err_mem_free; + of_node_put(np); pr_info("Using %dkB queues\n", 1 << (xive_queue_shift - 10)); return true; @@ -878,6 +879,8 @@ bool __init xive_spapr_init(void) xive_irq_bitmap_remove_all(); err_unmap: iounmap(tima); +err_put: + of_node_put(np); return false; } -- 2.35.1
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