Message ID | 20220620155118.117962-2-cengiz.can@canonical.com |
---|---|
State | New |
Headers | show
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Mon, 20 Jun 2022 08:51:54 -0700 (PDT) Received: from localhost ([2001:67c:1560:8007::aac:c03c]) by smtp.gmail.com with ESMTPSA id ku22-20020a170907789600b006f3ef214dd2sm6138398ejc.56.2022.06.20.08.51.54 for <kernel-team@lists.ubuntu.com> (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jun 2022 08:51:54 -0700 (PDT) From: Cengiz Can <cengiz.can@canonical.com> To: kernel-team@lists.ubuntu.com Subject: [SRU][Bionic][PATCH 1/1] staging: ion: Prevent incorrect reference counting behavour Date: Mon, 20 Jun 2022 18:51:20 +0300 Message-Id: <20220620155118.117962-2-cengiz.can@canonical.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220620155118.117962-1-cengiz.can@canonical.com> References: <20220620155118.117962-1-cengiz.can@canonical.com> MIME-Version: 1.0 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions <kernel-team.lists.ubuntu.com> List-Unsubscribe: <https://lists.ubuntu.com/mailman/options/kernel-team>, <mailto:kernel-team-request@lists.ubuntu.com?subject=unsubscribe> List-Archive: <https://lists.ubuntu.com/archives/kernel-team> List-Post: <mailto:kernel-team@lists.ubuntu.com> List-Help: <mailto:kernel-team-request@lists.ubuntu.com?subject=help> List-Subscribe: <https://lists.ubuntu.com/mailman/listinfo/kernel-team>, <mailto:kernel-team-request@lists.ubuntu.com?subject=subscribe> Content-Type: text/plain; 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Series |
CVE-2021-39714
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diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index 4ec05333da1de..0b50e47502911 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -158,6 +158,9 @@ static void *ion_buffer_kmap_get(struct ion_buffer *buffer) void *vaddr; if (buffer->kmap_cnt) { + if (buffer->kmap_cnt == INT_MAX) + return ERR_PTR(-EOVERFLOW); + buffer->kmap_cnt++; return buffer->vaddr; }