linux-kernel - [PATCH] video: fbdev: uvesafb: Fixes an error handling path in 'uvesafb

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>] [day] [month] [year] [list]

Date:   Sun,  6 Jun 2021 17:46:28 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     spock@...too.org, adaplas@...il.com, akpm@...ux-foundation.org
Cc:     linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] video: fbdev: uvesafb: Fixes an error handling path in 'uvesafb_probe()'

If an error occurs after a successful 'uvesafb_init_mtrr()' call, it must
be undone by a corresponding 'arch_phys_wc_del()' call, as already done in
the remove function.

This has been added in the remove function in commit 63e28a7a5ffc
("uvesafb: Clean up MTRR code")

Fixes: 8bdb3a2d7df4 ("uvesafb: the driver core")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Unsure about the Fixes tag, maybe it is 63e28a7a5ffc
---
 drivers/video/fbdev/uvesafb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/video/fbdev/uvesafb.c b/drivers/video/fbdev/uvesafb.c
index 4df6772802d7..a7e606520dfc 100644
--- a/drivers/video/fbdev/uvesafb.c
+++ b/drivers/video/fbdev/uvesafb.c
@@ -1757,6 +1757,7 @@ static int uvesafb_probe(struct platform_device *dev)
 
 out_unmap:
 	iounmap(info->screen_base);
+	arch_phys_wc_del(par->mtrr_handle);
 out_mem:
 	release_mem_region(info->fix.smem_start, info->fix.smem_len);
 out_reg:
-- 
2.30.2