lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20230614164454.GA390511@sumitra.com>
Date:   Wed, 14 Jun 2023 09:44:54 -0700
From:   Sumitra Sharma <sumitraartsy@...il.com>
To:     Forest Bond <forest@...ttletooquiet.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Cc:     Ira Weiny <ira.weiny@...el.com>, Fabio <fmdefrancesco@...il.com>,
        Deepak R Varma <drv@...lo.com>,
        Sumitra Sharma <sumitraartsy@...il.com>
Subject: [PATCH] drivers/target: Call page_address() on page acquired with
 GFP_KERNEL flag

rd_allocate_sgl_table() acquires a page with alloc_pages(GFP_KERNEL, 0).
Pages allocated with GFP_KERNEL cannot come from Highmem. This is why
there is no need to call kmap() on them.

Therefore, use a plain page_address() on that page.

Signed-off-by: Sumitra Sharma <sumitraartsy@...il.com>
---
 drivers/target/target_core_rd.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 6648c1c90e19..d8ea6aff39a2 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -159,9 +159,8 @@ static int rd_allocate_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table *
 			sg_assign_page(&sg[j], pg);
 			sg[j].length = PAGE_SIZE;
 
-			p = kmap(pg);
+			p = page_address(pg);
 			memset(p, init_payload, PAGE_SIZE);
-			kunmap(pg);
 		}
 
 		page_offset += sg_per_table;
-- 
2.25.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ