linux-kernel - [PATCH AUTOSEL 5.4 12/21] cxl: Fix a memory leak in an error handling path

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Message-Id: <20220814153531.2379705-12-sashal@kernel.org>
Date:   Sun, 14 Aug 2022 11:35:22 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>, fbarrat@...ux.ibm.com,
        linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH AUTOSEL 5.4 12/21] cxl: Fix a memory leak in an error handling path

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit 3a15b45b5454da862376b5d69a4967f5c6fa1368 ]

A bitmap_zalloc() must be balanced by a corresponding bitmap_free() in the
error handling path of afu_allocate_irqs().

Acked-by: Andrew Donnellan <ajd@...ux.ibm.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Link: https://lore.kernel.org/r/ce5869418f5838187946eb6b11a52715a93ece3d.1657566849.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/misc/cxl/irq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c
index 4cb829d5d873..2e4dcfebf19a 100644
--- a/drivers/misc/cxl/irq.c
+++ b/drivers/misc/cxl/irq.c
@@ -349,6 +349,7 @@ int afu_allocate_irqs(struct cxl_context *ctx, u32 count)
 
 out:
 	cxl_ops->release_irq_ranges(&ctx->irqs, ctx->afu->adapter);
+	bitmap_free(ctx->irq_bitmap);
 	afu_irq_name_free(ctx);
 	return -ENOMEM;
 }
-- 
2.35.1