linux-ext4 - [PATCH 0/2] ext2: Avoid parsing options under a spinlock

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]

Date:   Mon,  9 Oct 2017 17:00:40 +0200
From:   Jan Kara <jack@...e.cz>
To:     <linux-ext4@...r.kernel.org>
Cc:     Al Viro <viro@...IV.linux.org.uk>,
        Jia-Ju Bai <baijiaju1990@....com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jan Kara <jack@...e.cz>
Subject: [PATCH 0/2] ext2: Avoid parsing options under a spinlock

Hello,

as Jia-Ju Bai pointed out, match_int() can sleep due to GFP_KERNEL allocation.
Change ext2 mount option parsing so that it does not happen under sbi->s_lock
spinlock. That is a reasonable change anyway and as a sideeffect we don't
have to restore old options if new options cannot be used for some reason.
If nobody objects, I'll push these patches through my tree.

								Honza