linux-kernel - Re: [PATCH v2] io_uring: fix filename leak in __io_openat

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Message-ID: <20251225151808.lvpfdwqvcej4vxgm@inspiron>
Date: Thu, 25 Dec 2025 20:48:08 +0530
From: Prithvi <activprithvi@...il.com>
To: Jens Axboe <axboe@...nel.dk>
Cc: io-uring@...r.kernel.org, brauner@...nel.org, jack@...e.cz,
	viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-kernel-mentees@...ts.linux.dev,
	skhan@...uxfoundation.org, david.hunter.linux@...il.com,
	khalid@...nel.org,
	syzbot+00e61c43eb5e4740438f@...kaller.appspotmail.com,
	stable@...r.kernel.org
Subject: Re: [PATCH v2] io_uring: fix filename leak in __io_openat_prep()

On Thu, Dec 25, 2025 at 08:08:50AM -0700, Jens Axboe wrote:
> 
> On Thu, 25 Dec 2025 12:58:29 +0530, Prithvi Tambewagh wrote:
> >  __io_openat_prep() allocates a struct filename using getname(). However,
> > for the condition of the file being installed in the fixed file table as
> > well as having O_CLOEXEC flag set, the function returns early. At that
> > point, the request doesn't have REQ_F_NEED_CLEANUP flag set. Due to this,
> > the memory for the newly allocated struct filename is not cleaned up,
> > causing a memory leak.
> > 
> > [...]
> 
> Applied, thanks!
> 
> [1/1] io_uring: fix filename leak in __io_openat_prep()
>       commit: b14fad555302a2104948feaff70503b64c80ac01
> 
> Best regards,
> -- 
> Jens Axboe
> 
> 
> 

Thank you!

Best Regards,
Prithvi