From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 56A422737F2 for ; Sat, 28 Feb 2026 18:11:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302306; cv=none; b=rADFnnPLUSeztkYFGtUO26vXJFNisrG9sLI886CVayjhGmeWlfGgMQV9x9fhAEfP8tNxgJpF9kqIWDKzeW9Y/4RzHzSXBAcw/86nCxK05Fjj8opkKI9vrRAEd8QhNpOso74/lScpCAvdoawVu8QV+gp7FuvFnNUJeeQa7ourbjU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302306; c=relaxed/simple; bh=PgPlUT3kmH/CP/Upfcoc+vQNakq4OTVImBb7qE1tsAk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sAMdvGdgLLEk5zY64dFmtW6wA/7AKTnNQmqVZON3j23ctUzc+/a2txhq1QW7roB3e13I3aIWMycQNQpHZXTEhvzflmHA9HpMBOFJ8n+/mbNrJX5T6zzWb0+3TqPM+PMsPycI5CHUNKxqTJ5BesCW8xxM6mukFuOQCGHlV0Mb3Ck= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YkGofw6p; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YkGofw6p" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8DAC3C116D0; Sat, 28 Feb 2026 18:11:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772302306; bh=PgPlUT3kmH/CP/Upfcoc+vQNakq4OTVImBb7qE1tsAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YkGofw6pIsui0embQ2ZPthO5RuaDe+K4BOOyubGv9bkphogOZBtCRBus8cLmdn8b6 Tg2TblpdT9rvvugIcRUSB8J2wrcglsv8xbuuQ6fk1ejlTyfplf+IJFW26pc1D3bLN7 NSsUZ/wn5KBndjDU0eH9nOLWvnISbxjme7wzLFYP2tFmab+sW/HZGIaCeR4YZ+I5St v7uDRSPIhWHoMDAYeZT910k58IbCorV+eMf5232IpiZ1aZBz8vK4KG4FFyTpJb6Wpq EUjdtIMBztubtKf6fF9aMF3R8dAgEvq2uglnIPhpYBnh2ZlxBx1AGDF4pGHJDk+JJC rfjks/Hrxi7KA== From: Sasha Levin To: patches@lists.linux.dev Cc: Jens Axboe , Sasha Levin Subject: [PATCH 6.1 021/232] io_uring/sync: validate passed in offset Date: Sat, 28 Feb 2026 13:07:54 -0500 Message-ID: <20260228181127.1592657-21-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228181127.1592657-1-sashal@kernel.org> References: <20260228181127.1592657-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Jens Axboe [ Upstream commit 649dd18f559891bdafc5532d737c7dfb56060a6d ] Check if the passed in offset is negative once cast to sync->off. This ensures that -EINVAL is returned for that case, like it would be for sync_file_range(2). Fixes: c992fe2925d7 ("io_uring: add fsync support") Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- io_uring/sync.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/io_uring/sync.c b/io_uring/sync.c index 64e87ea2b8fbb..59f951a4b5241 100644 --- a/io_uring/sync.c +++ b/io_uring/sync.c @@ -61,6 +61,8 @@ int io_fsync_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) return -EINVAL; sync->off = READ_ONCE(sqe->off); + if (sync->off < 0) + return -EINVAL; sync->len = READ_ONCE(sqe->len); return 0; } -- 2.51.0