linux-kernel - [PATCH 2/2] PM/hibernate: remove the bogus call to get_gendisk in software

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-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 25 Sep 2020 18:14:47 +0200
From:   Christoph Hellwig <hch@....de>
To:     Tejun Heo <tj@...nel.org>, Jens Axboe <axboe@...nel.dk>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        Minho Ban <mhban@...sung.com>
Cc:     cgroups@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH 2/2] PM/hibernate: remove the bogus call to get_gendisk in software_resume

get_gendisk grabs a reference on the disk and file operation, so this
code will leak both of them while having absolutely no use for the
gendisk itself.

This effectively reverts commit 2df83fa4bce421f
("PM / Hibernate: Use get_gendisk to verify partition if resume_file is integer format")

Signed-off-by: Christoph Hellwig <hch@....de>
---
 kernel/power/hibernate.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index e7aa57fb2fdc33..7d0b99d2e69631 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -948,17 +948,6 @@ static int software_resume(void)
 
 	/* Check if the device is there */
 	swsusp_resume_device = name_to_dev_t(resume_file);
-
-	/*
-	 * name_to_dev_t is ineffective to verify parition if resume_file is in
-	 * integer format. (e.g. major:minor)
-	 */
-	if (isdigit(resume_file[0]) && resume_wait) {
-		int partno;
-		while (!get_gendisk(swsusp_resume_device, &partno))
-			msleep(10);
-	}
-
 	if (!swsusp_resume_device) {
 		/*
 		 * Some device discovery might still be in progress; we need
-- 
2.28.0