From: Hugh Dickins <hugh@veritas.com>
Date: Mon, 9 Jan 2006 20:46:49 +0000 (+0000)
Subject: [PATCH] Fix sg_page_malloc() memset
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=41ed16fa47350661da01443b8241bf6ca8080fd7;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] Fix sg_page_malloc() memset

sg_page_malloc should clear the data buffer, not that extent of mem_map.

This fixes Jesper's sg_page_free "Bad page states"

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 221e96e2620a..78aad9582bcf 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -2493,7 +2493,7 @@ sg_page_malloc(int rqSz, int lowDma, int *retSzp)
 	}
 	if (resp) {
 		if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
-			memset(resp, 0, resSz);
+			memset(page_address(resp), 0, resSz);
 		if (retSzp)
 			*retSzp = resSz;
 	}