{"id":18604,"url":"https://patchwork.libcamera.org/api/1.1/patches/18604/?format=json","web_url":"https://patchwork.libcamera.org/patch/18604/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20230505161346.25489-1-mail@eliasnaur.com>","date":"2023-05-05T16:13:46","name":"[libcamera-devel,v2] libcamera: v4l2_videodevice: Use O_CLOEXEC when exporting DMA buffers","commit_ref":"4c71ec00c2ea5c6acc75e436bf6d24e6861cb66f","pull_url":null,"state":"accepted","archived":false,"hash":"7ba14f4d137fb685b307d66b163459e06cd35a8e","submitter":{"id":159,"url":"https://patchwork.libcamera.org/api/1.1/people/159/?format=json","name":"Elias Naur","email":"mail@eliasnaur.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/18604/mbox/","series":[{"id":3866,"url":"https://patchwork.libcamera.org/api/1.1/series/3866/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=3866","date":"2023-05-05T16:13:46","name":"[libcamera-devel,v2] libcamera: v4l2_videodevice: Use O_CLOEXEC when exporting DMA buffers","version":2,"mbox":"https://patchwork.libcamera.org/series/3866/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/18604/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/18604/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id ADE2CC0DA4\n\tfor ;\n\tFri, 5 May 2023 16:14:01 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id E3C4C633AC;\n\tFri, 5 May 2023 18:14:00 +0200 (CEST)","from mail-vk1-xa30.google.com (mail-vk1-xa30.google.com\n\t[IPv6:2607:f8b0:4864:20::a30])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 5C7E7627DE\n\tfor ;\n\tFri, 5 May 2023 18:13:59 +0200 (CEST)","by mail-vk1-xa30.google.com with SMTP id\n\t71dfb90a1353d-44fa585ad7aso1326950e0c.0\n\tfor ;\n\tFri, 05 May 2023 09:13:59 -0700 (PDT)","from localhost.localdomain ([190.53.13.8])\n\tby smtp.gmail.com with ESMTPSA id\n\tp68-20020a1f2947000000b00440186078d6sm28599vkp.50.2023.05.05.09.13.56\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tFri, 05 May 2023 09:13:57 -0700 (PDT)"],"DKIM-Signature":["v=1; 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\n\tFri, 05 May 2023 09:13:57 -0700 (PDT)","To":"libcamera-devel@lists.libcamera.org","Date":"Fri, 5 May 2023 10:13:46 -0600","Message-Id":"<20230505161346.25489-1-mail@eliasnaur.com>","X-Mailer":"git-send-email 2.39.2","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH v2] libcamera: v4l2_videodevice: Use\n\tO_CLOEXEC when exporting DMA buffers","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","From":"Elias Naur via libcamera-devel ","Reply-To":"Elias Naur ","Cc":"Elias Naur ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Files opened internally in libcamera without the O_CLOEXEC file will\nremain open upon a call to one of the exec(3) functions. As exec()\ndoesn't destroy local or global objects, this can lead to various side\neffects. Avoid this by opening file descriptors with O_CLOEXEC for all\ninternal files.\n\nThe O_CLOEXEC flag should also be set when obtaining file handles from\nthe V4L2 VIDIOC_EXPBUF operation, but was missed during the updates to\nboth d942bdc913c5 (\"libcamera: v4l2_device: openat(2) with O_CLOEXEC to\ncleanup after exec(3)\") and 436b38fd89fe (\"libcamera: Open files with\nO_CLOEXEC\").\n\nSet the O_CLOEXEC flag on calls to ioctl(VIDIOC_EXPBUF).\n\nFixes: 436b38fd89fe (\"libcamera: Open files with O_CLOEXEC\")\nSigned-off-by: Elias Naur \nReviewed-by: Kieran Bingham \n---\n\nUpdated commit message as suggested by Kieran (thanks!).\n\n src/libcamera/v4l2_videodevice.cpp | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp\nindex 1051997e..a72ef64d 100644\n--- a/src/libcamera/v4l2_videodevice.cpp\n+++ b/src/libcamera/v4l2_videodevice.cpp\n@@ -1471,7 +1471,7 @@ UniqueFD V4L2VideoDevice::exportDmabufFd(unsigned int index,\n \texpbuf.type = bufferType_;\n \texpbuf.index = index;\n \texpbuf.plane = plane;\n-\texpbuf.flags = O_RDWR;\n+\texpbuf.flags = O_CLOEXEC | O_RDWR;\n \n \tret = ioctl(VIDIOC_EXPBUF, &expbuf);\n \tif (ret < 0) {\n","prefixes":["libcamera-devel","v2"]}