From: Dave Hansen <dave.hansen@intel.com>
To: Thorsten Blum <thorsten.blum@linux.dev>,
Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH RESEND 1/2] x86/boot: validate earlyprintk= baud rate
Date: Wed, 13 May 2026 10:05:30 -0700 [thread overview]
Message-ID: <a2ab80f3-2887-499c-951b-1b587ea58b2b@intel.com> (raw)
In-Reply-To: <20260513164844.449910-4-thorsten.blum@linux.dev>
> Values greater than BASE_BAUD would produce divisor 0, and
> baud 1 would produce divisor BASE_BAUD, which exceeds 16 bits.
My inclination would be to leave this code as simple as possible. If
users screw up a baud rate, they'll get no output and have to go fix it.
Why does this need to be robust against bad user input?
next prev parent reply other threads:[~2026-05-13 17:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-13 16:48 [PATCH RESEND 1/2] x86/boot: validate earlyprintk= baud rate Thorsten Blum
2026-05-13 16:48 ` [PATCH RESEND 2/2] x86/boot: use BASE_BAUD and DEFAULT_SERIAL_PORT Thorsten Blum
2026-05-13 17:05 ` Dave Hansen [this message]
2026-05-15 10:47 ` [PATCH RESEND 1/2] x86/boot: validate earlyprintk= baud rate Thorsten Blum
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