linux-kernel - [PATCH 4.9 017/148] efi/esrt: Use memunmap() instead of kfree() to free the remapping

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Date:   Tue, 12 Dec 2017 13:43:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pan Bian <bianpan2016@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-efi@...r.kernel.org, Ingo Molnar <mingo@...nel.org>
Subject: [PATCH 4.9 017/148] efi/esrt: Use memunmap() instead of kfree() to free the remapping

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pan Bian <bianpan2016@....com>

commit 89c5a2d34bda58319e3075e8e7dd727ea25a435c upstream.

The remapping result of memremap() should be freed with memunmap(), not kfree().

Signed-off-by: Pan Bian <bianpan2016@....com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Matt Fleming <matt@...eblueprint.co.uk>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-efi@...r.kernel.org
Link: http://lkml.kernel.org/r/20171206095010.24170-3-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/firmware/efi/esrt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/firmware/efi/esrt.c
+++ b/drivers/firmware/efi/esrt.c
@@ -428,7 +428,7 @@ err_remove_group:
 err_remove_esrt:
 	kobject_put(esrt_kobj);
 err:
-	kfree(esrt);
+	memunmap(esrt);
 	esrt = NULL;
 	return error;
 }