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[109.173.93.221]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-373ba4cdf62sm5338621fa.51.2025.10.02.01.48.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Oct 2025 01:48:32 -0700 (PDT) From: Alexandr Sapozhnkiov To: Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Daniel Vetter , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Alexandr Sapozhnikov , linux-media@vger.kernel.org, lvc-project@linuxtesting.org Subject: [PATCH 5.10] gpu/i915: fix error return in mmap_offset_attach() Date: Thu, 2 Oct 2025 11:48:26 +0300 Message-ID: <20251002084828.11-1-alsp705@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Alexandr Sapozhnikov In the drm_vma_node_allow function, kmalloc may=20 return NULL, in which case the file element will not be=20 added to the mmo->vma_node list. It would be good to=20 not ignore this event, but at least log an error message. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Alexandr Sapozhnikov --- drivers/gpu/drm/i915/gem/i915_gem_mman.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i91= 5/gem/i915_gem_mman.c index a2195e28b625..adaef8f09d59 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -706,8 +706,11 @@ mmap_offset_attach(struct drm_i915_gem_object *obj, mmo =3D insert_mmo(obj, mmo); GEM_BUG_ON(lookup_mmo(obj, mmap_type) !=3D mmo); out: - if (file) - drm_vma_node_allow_once(&mmo->vma_node, file); + if (file) { + err =3D drm_vma_node_allow_once(&mmo->vma_node, file); + if (err) + goto err; + } return mmo; =20 err: --=20 2.43.0