linux-kernel - Re: [PATCH] eventfd: strictly check the count parameter of eventfd

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Message-ID: <20240207-formgebend-ratsam-e3372573781f@brauner>
Date: Wed,  7 Feb 2024 10:56:33 +0100
From: Christian Brauner <brauner@...nel.org>
To: Jens Axboe <axboe@...nel.dk>,
	wenyang.linux@...mail.com
Cc: Christian Brauner <brauner@...nel.org>,
	Jan Kara <jack@...e.cz>,
	David Woodhouse <dwmw@...zon.co.uk>,
	Matthew Wilcox <willy@...radead.org>,
	Eric Biggers <ebiggers@...gle.com>,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] eventfd: strictly check the count parameter of eventfd_write to avoid inputting illegal strings

On Wed, 07 Feb 2024 00:35:18 +0800, wenyang.linux@...mail.com wrote:
> Since eventfd's document has clearly stated: A write(2) call adds
> the 8-byte integer value supplied in its buffer to the counter.
> 
> However, in the current implementation, the following code snippet
> did not cause an error:
> 
> 	char str[16] = "hello world";
> 	uint64_t value;
> 	ssize_t size;
> 	int fd;
> 
> [...]

Applied to the vfs.misc branch of the vfs/vfs.git tree.
Patches in the vfs.misc branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.misc

[1/1] eventfd: strictly check the count parameter of eventfd_write to avoid inputting illegal strings
      https://git.kernel.org/vfs/vfs/c/325e56e9236e