From: Nam Cao <namcao@linutronix.de>
To: Anshika Jain <anshikajain196872@gmail.com>,
Andy Shevchenko <andy@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
sashiko-bot@kernel.org, dri-devel@lists.freedesktop.org,
linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev,
Anshika Jain <anshikajain196872@gmail.com>
Subject: Re: [PATCH] staging: fbtft: fix len<=0 buffer overflow in define_fbtft_write_reg()
Date: Wed, 02 Sep 2026 14:25:46 +0200 [thread overview]
Message-ID: <87wlt3vnzp.fsf@yellow.woof> (raw)
In-Reply-To: <20260902045026.7442-1-anshikajain196872@gmail.com>
Anshika Jain <anshikajain196872@gmail.com> writes:
> This is a latent bug: nothing in the current code prevents
> two adjacent negative values in an init_sequence from producing len=0,
Can you elaborate what you mean by "two adjacent negative values in an
init_sequence from producing len=0"? How is it possible that negative
values in the init sequence causing len to be zero?
> and there is no guarantee future or out-of-tree panel definitions
> won't do so.
Basic testing of future drivers would prevent such bug. It is not on any
rarely-executed code path.
Nam
next prev parent reply other threads:[~2026-09-02 12:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-02 4:50 [PATCH] staging: fbtft: fix len<=0 buffer overflow in define_fbtft_write_reg() Anshika Jain
2026-09-02 5:58 ` Greg Kroah-Hartman
2026-09-02 12:25 ` Nam Cao [this message]
2026-09-02 19:03 ` Anshika Jain
2026-09-03 8:24 ` Nam Cao
2026-09-03 8:29 ` Greg Kroah-Hartman
2026-09-03 7:47 ` sashiko-bot
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