linux-kernel - Re: [PATCH v4 15/59] struct filename: saner handling of long names

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Message-ID: <64f6bd19-7906-4138-ae1b-a5a443ed140d@sirena.org.uk>
Date: Tue, 13 Jan 2026 17:51:34 +0000
From: Mark Brown <broonie@...nel.org>
To: Al Viro <viro@...iv.linux.org.uk>
Cc: linux-fsdevel@...r.kernel.org, torvalds@...ux-foundation.org,
	brauner@...nel.org, jack@...e.cz, mjguzik@...il.com,
	paul@...l-moore.com, axboe@...nel.dk, audit@...r.kernel.org,
	io-uring@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 15/59] struct filename: saner handling of long names

On Tue, Jan 13, 2026 at 03:39:53PM +0000, Al Viro wrote:
> On Tue, Jan 13, 2026 at 03:31:14PM +0000, Mark Brown wrote:

> > I'm seeing a regression in -next in the execveat kselftest which bisects
> > to 2a0db5f7653b ("struct filename: saner handling of long names").  The
> > test triggers two new failures with very long filenames for tests that
> > previously succeeded:

> Could you check if replacing (in include/linux/fs.h)

> #define EMBEDDED_NAME_MAX       192 - sizeof(struct __filename_head)

> with

> #define EMBEDDED_NAME_MAX       (192 - sizeof(struct __filename_head))

> is sufficient for fixing that reproducer?

Yes, that fixes both testcases - thanks!

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