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Fri, 19 Apr 2024 08:51:24 -0700 (PDT) Received: from kernelexploit-virtual-machine.localdomain ([121.185.186.233]) by smtp.gmail.com with ESMTPSA id hi2-20020a17090b30c200b002a22ddac1a1sm3302767pjb.24.2024.04.19.08.51.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Apr 2024 08:51:24 -0700 (PDT) From: Jeongjun Park To: syzbot+a81f2759d022496b40ab@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [net?] KMSAN: uninit-value in hsr_get_node (3) Date: Sat, 20 Apr 2024 00:51:20 +0900 Message-Id: <20240419155120.15602-1-aha310510@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <0000000000004a86bf0616571fc7@google.com> References: <0000000000004a86bf0616571fc7@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit please test uninit-value in hsr_get_node #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master --- drivers/net/tun.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 0b3f21cba552..5300bbbc617d 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1676,7 +1676,7 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, rcu_read_unlock(); alloc_frag->offset = ALIGN((u64)alloc_frag->offset, SMP_CACHE_BYTES); - if (unlikely(!skb_page_frag_refill(buflen, alloc_frag, GFP_KERNEL))) + if (unlikely(!skb_page_frag_refill(buflen, alloc_frag, GFP_KERNEL | __GFP_ZERO))) return ERR_PTR(-ENOMEM); buf = (char *)page_address(alloc_frag->page) + alloc_frag->offset; -- 2.34.1