From: Josh Law <objecting@objecting.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Josh Law <objecting@objecting.org>, linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] lib/bch: fix undefined behavior from signed left-shifts
Date: Wed, 18 Mar 2026 07:48:04 +0000 [thread overview]
Message-ID: <20260318074806.16527-1-objecting@objecting.org> (raw)
Fix two instances of undefined behavior in lib/bch.c caused by
left-shifting signed integers into or past the sign bit.
While the kernel's -fno-strict-overflow flag prevents miscompilation
today, these are formally UB per C11 6.5.7p4 and trivial to fix.
Josh Law (2):
lib/bch: fix signed left-shift undefined behavior
lib/bch: fix signed shift overflow in build_mod8_tables
lib/bch.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--
2.34.1
next reply other threads:[~2026-03-18 7:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-18 7:48 Josh Law [this message]
2026-03-18 7:48 ` [PATCH 1/2] lib/bch: fix signed left-shift undefined behavior Josh Law
2026-03-18 7:48 ` [PATCH 2/2] lib/bch: fix signed shift overflow in build_mod8_tables Josh Law
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