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b=XyB9mA2GbprckxdRnuWQa22yX5xf4kiCuw/Zl7hq3iUF8c85J86Oh8Sx9OeYuaQcI QFbLl8HscFDTH9/9qTwc0hbiNiKO38ua632AZkZEJCyiBtPBQM5gX+YVEhGPLJH28Z OVEZULHGCNYwoR2hrmZnN8po+Wz96LK61uAs3Zww= Received: from pek-lxu-l1.wrs.com ([111.198.228.153]) by newxmesmtplogicsvrsza15-1.qq.com (NewEsmtp) with SMTP id 9B6084C9; Sun, 12 May 2024 17:38:54 +0800 X-QQ-mid: xmsmtpt1715506734txco6kadc Message-ID: X-QQ-XMAILINFO: MBjwNRQMz5zU6FmzQCNFwtIE/I12sqmXqAjPBUc2D4NuKPusnAFRjlPZMdHlss iH25s+Ul6gDqy4JqLlQYKnl05+/C6oyr10OnGFEjvBDO1Bq3WrLg04hm9jk31vUz/gyV88k79vLv hACPFLO0jo4SAdztn33VxOrQZauBKOg+Wu1PPSQxVyEsIiNWr3qsRSbmWAdTwa5s8fhCxjc47QjB h9aW1sPfEped1b+FU/MeLL3XcWrMd0h6AMJxJQZNI+xa28krvWKwUTbuwrEIBi9G9SwEP1+pRlh1 y7pOgAqnusQ6MI3Elau596vMK6tCC62eR1MklqEZ4PUZJTTfQoPDiIBJYqRUHzB+BX31HMG4pDds YO1PfY7SvuDnqpNpaNpAUUagxfq2KN4/JbLXoLu2Hov5ooBltulgrROm42APRiTk5zBRUDrJWTj9 X0dwV0fpslEqQ/bxMdHGJBzIdM8LuD6M6E5aSo7mqk20BcDKYWhT7eNYEzhKguw34ultQqbfI8ip +Obj4qJ8y1y+Hiw2V9ZJGP19Dy21E44+KSYka2q9L87nTQFGZsht5LV/7ytaJeLQjWx86JW9JyVe jCuxXOpUGTX43KQBjzata1BZo8DWF7SQWJG0U7MBkiPg7Wz0Qq2NIYQrp1t2ztH1TaRBBNDuObwd IQy1CfA5xlreR9M9CPPe8Eg5wv5O6iP2nhSzyGFOuP0kFlhwjdoiWoENlmL+8cuBZYboTLt+bIYF Y/tiVEldd4lz25Zxsb2nMJJX6tXpdfWi4cUjflL3yaJx3mMkZqE8kAO0mQ9S5iseJkCrivJzHszM r0EPcUSXQDsD/n/L3AJhTpSEaixXb3PeC7oqKFGe26dGRQRp7bcKXz/MJ2VHJYgISKndq69g+OF3 VxGpHk8PsHNvgb3L6fjWe1poYp2qBF27lkOEj8FAldXCQI+Ye0CgDnXnUDk6K6gGedQJpHriWa X-QQ-XMRINFO: NyFYKkN4Ny6FSmKK/uo/jdU= From: Edward Adam Davis To: syzbot+a63a1f6a062033cf0f40@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [bridge?] KMSAN: uninit-value in br_dev_xmit (2) Date: Sun, 12 May 2024 17:38:54 +0800 X-OQ-MSGID: <20240512093854.3012612-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <000000000000d4e70506183d374d@google.com> References: <000000000000d4e70506183d374d@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 uiv in br_dev_xmit #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dccb07f2914c diff --git a/net/core/skbuff.c b/net/core/skbuff.c index b99127712e67..578590c83580 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -2247,6 +2247,7 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail, goto nodata; size = SKB_WITH_OVERHEAD(size); + memset(data, 0, size); /* Copy only real data... and, alas, header. This should be * optimized for the cases when header is void. */