{"id":2220914,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2220914/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/aafb835339cafc1544280c027200db8b28df6edb.1775648406.git.ritesh.list@gmail.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.1/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/"},"msgid":"","date":"2026-04-08T12:01:32","name":"[RFC,v2,02/10] pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"fcfbfea92e7db62ca634e78d45abd49af1bc7c4a","submitter":{"id":79126,"url":"http://patchwork.ozlabs.org/api/1.1/people/79126/?format=json","name":"Ritesh Harjani (IBM)","email":"ritesh.list@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/aafb835339cafc1544280c027200db8b28df6edb.1775648406.git.ritesh.list@gmail.com/mbox/","series":[{"id":499129,"url":"http://patchwork.ozlabs.org/api/1.1/series/499129/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499129","date":"2026-04-08T12:01:30","name":"pseries/papr-hvpipe: Fix deadlock, races and misc cleanups","version":2,"mbox":"http://patchwork.ozlabs.org/series/499129/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2220914/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2220914/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=UgoaCnvs;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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Because the struct papr_hvpipe_hdr\ncontains reserved padding bytes (reserved[3] and reserved2[40]), these\ncould leak the uninitialized bytes to userspace after copy_to_user().\n\nThis patch fixes that by initializing the whole struct to 0.\n\nCc: stable@vger.kernel.org\nFixes: 814ef095f12c9 (\"powerpc/pseries: Add papr-hvpipe char driver for HVPIPE interfaces\")\nSigned-off-by: Ritesh Harjani (IBM) \n---\n arch/powerpc/platforms/pseries/papr-hvpipe.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/arch/powerpc/platforms/pseries/papr-hvpipe.c b/arch/powerpc/platforms/pseries/papr-hvpipe.c\nindex c41d45e1986d..3392874ebdf6 100644\n--- a/arch/powerpc/platforms/pseries/papr-hvpipe.c\n+++ b/arch/powerpc/platforms/pseries/papr-hvpipe.c\n@@ -327,7 +327,7 @@ static ssize_t papr_hvpipe_handle_read(struct file *file,\n {\n \n \tstruct hvpipe_source_info *src_info = file->private_data;\n-\tstruct papr_hvpipe_hdr hdr;\n+\tstruct papr_hvpipe_hdr hdr = {};\n \tlong ret;\n \n \t/*\n","prefixes":["RFC","v2","02/10"]}