linux-kernel - Re: [PATCH v3] fs: introduce getfsxattrat and setfsxattrat syscalls

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Message-ID: <CAHC9VhSnP=j_T30ctVmzQ8TwhD6YFcrWhLbqa_oG3WSAPUPOaA@mail.gmail.com>
Date: Fri, 21 Feb 2025 19:33:59 -0500
From: Paul Moore <paul@...l-moore.com>
To: Andrey Albershteyn <aalbersh@...hat.com>, Mickaël Salaün <mic@...ikod.net>
Cc: Richard Henderson <richard.henderson@...aro.org>, Matt Turner <mattst88@...il.com>, 
	Russell King <linux@...linux.org.uk>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <will@...nel.org>, Geert Uytterhoeven <geert@...ux-m68k.org>, Michal Simek <monstr@...str.eu>, 
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	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>, Helge Deller <deller@....de>, 
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	linux-xfs@...r.kernel.org
Subject: Re: [PATCH v3] fs: introduce getfsxattrat and setfsxattrat syscalls

On Fri, Feb 21, 2025 at 10:08 AM Mickaël Salaün <mic@...ikod.net> wrote:
>
> It looks security checks are missing.  With IOCTL commands, file
> permissions are checked at open time, but with these syscalls the path
> is only resolved but no specific access seems to be checked (except
> inode_owner_or_capable via vfs_fileattr_set).

Thanks for reviewing the patch and catching this Mickaël.  I agree
with the hooks identified and their placement; it should be fairly
straightforward with only a few lines added in each case.

-- 
paul-moore.com