From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 30508377A81 for ; Fri, 16 Oct 2026 07:31:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792135921; cv=none; b=DQDvXeA0LpZQPQ0Jmd0mN17YDmEOBIXe+CM+9gaYjuZTsQjMVtzq7onc+fFEGJpq7GyOTDh1rJwQwMi2sCflTCuLMRCkvpUIgZO4kDE84ii0df2ar7t0225y4UOHAbRpltPVAcM6mO5NsjMb6t/UIzvZBoKMfEq1PBvyXXPt1mM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792135921; c=relaxed/simple; bh=fMyUJAt+U6yiT87rnthLZ+bR8CT/dYgEIqh9S6vKb58=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WELAkhHIJjLi+18BOq2tYg/xlK0pXMWfwz/0e5FK2YQTErAQBFm3ZdyuoIVe0qa+NnXk5ChVKIqzXQVQVodsLKb0wEHErwI+hocdokxB3rOktj8grSYmj8QUuirzk/jsiuRxNEg91uVnqGFah1l6YpORncRuJ4004VqgpEDY4MM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AF6TTljC; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AF6TTljC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25E2E1F000C4; Fri, 16 Oct 2026 07:31:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792135919; bh=5/Ie465qnlNgII+rz7vZuby5Ts3O3OoWZbRZsv4JZws=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=AF6TTljCxZhT0jURXSINkMAO+7XvJq4Zs318ZgdpeBogcRHxO4vIgzS+/ihanzgKV 32KxwEJM/v9Vl63YaG5axoy2hiUyfChuzYvaY5pvhj3DdwwcXfsJtcwvNjoKUwtIfM yWHYDQwZksFd9EjjtCMDkSNR/+i+G0x/50c76smsxNX3EDYGrgNTl0V1uHniL3tkNu u7l2yg05Z73iMtxVTq1olSldRmbtQDvaGf/0KnUt+OlAkEjsK7d2hs6tI1kofsGKuH DZ4k2cWCH7X44CjvWyUWJ6nhDY+h9W37iBzG4IqKDqS7Fry2MFgAWh061lHpnZypfw RC6By7z1W+71A== From: Maxime Ripard Date: Fri, 16 Oct 2026 09:31:33 +0200 Subject: [PATCH v5 01/14] drm/atomic: Switch to krealloc_array() in drm_atomic_get_private_obj_state() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261016-drm-reset-state-flag-v5-1-dad2d64b693b@kernel.org> References: <20261016-drm-reset-state-flag-v5-0-dad2d64b693b@kernel.org> In-Reply-To: <20261016-drm-reset-state-flag-v5-0-dad2d64b693b@kernel.org> To: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Louis Chauvet , Haneen Mohammed , Melissa Wen Cc: Daniel Stone , Harry Wentland , Jocelyn Falempe , =?utf-8?q?Jonas_=C3=85dahl?= , =?utf-8?q?Michel_D=C3=A4nzer?= , Pekka Paalanen , Sebastian Wick , Simon Ser , Victoria Brekenfeld , Xaver Hugl , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Maxime Ripard X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1751; i=mripard@kernel.org; h=from:subject:message-id; bh=fMyUJAt+U6yiT87rnthLZ+bR8CT/dYgEIqh9S6vKb58=; b=owGbwMvMwCmsHn9OcpHtvjLG02pJDFkXLz3Mv9CX92B7PcPeYzJ7pvVwTc9e0p+4SXlTEkPCd K/ZE1nZOqayMAhzMsiKKbI8kQk7vbx9cZWD/cofMHNYmUCGMHBxCsBEvq5mrA8KKlWqj9rKttwv 6HVA1zfuujs3FvJs9lgn23mzJuPj8RcqOyZ1TJNh09cPMjBU99Faydiw6Kr5y51mNt5Sma84VC6 kenMutUwOVlqx3LbsIGt7t3yB6j/35UvWpQpe3BSWqh257hsA X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D The drm_atomic_get_private_obj_state() function manually computes the allocation size by multiplying the element count by the element size before passing it to krealloc(). krealloc_array() handles this multiplication internally and includes overflow checking. Switch to it and drop the now-unused size variable. Suggested-by: Thomas Zimmermann Reviewed-by: Daniel Stone Signed-off-by: Maxime Ripard --- drivers/gpu/drm/drm_atomic.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 9bb761eda59f..aa47c647df31 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1077,11 +1077,10 @@ EXPORT_SYMBOL(drm_atomic_private_obj_fini); struct drm_private_state * drm_atomic_get_private_obj_state(struct drm_atomic_commit *state, struct drm_private_obj *obj) { int index, num_objs, ret; - size_t size; struct __drm_private_objs_state *arr; struct drm_private_state *obj_state; WARN_ON(!state->acquire_ctx); drm_WARN_ON(state->dev, state->checked); @@ -1093,12 +1092,12 @@ drm_atomic_get_private_obj_state(struct drm_atomic_commit *state, ret = drm_modeset_lock(&obj->lock, state->acquire_ctx); if (ret) return ERR_PTR(ret); num_objs = state->num_private_objs + 1; - size = sizeof(*state->private_objs) * num_objs; - arr = krealloc(state->private_objs, size, GFP_KERNEL); + arr = krealloc_array(state->private_objs, num_objs, + sizeof(*state->private_objs), GFP_KERNEL); if (!arr) return ERR_PTR(-ENOMEM); state->private_objs = arr; index = state->num_private_objs; -- 2.55.0