From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1083C1D130E for ; Tue, 30 Sep 2025 20:29:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759264174; cv=none; b=NaNDJvgWZsSQPo9f1dZkCDUNa/BM/V3oCFFVB9EWig4ysMvqQAP43TVO0BqW4EQyWbAPHE+YToKi1E7hDGl5mv4xqJuu7tlNn93MqP2iYtN+mRyLVRsaYyTcUGUBMXKmICX1fB/cPetD1jCow/Mrgk+zCOTv1NwZ2xGkFPi8170= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759264174; c=relaxed/simple; bh=JWDPpUdmrq8kFuCinsRqhhI6vHfCxCFas1mQMZ+q478=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=nZKgeq7AsmVBLha1KNjh9ZtSXwkJ2OyX9DUnPDm2IVLsgnCPaSKkt5N943vTehjQGDR66fkAmt/quHpWKDUFjS2ZlYHIwMi0Vxec5auvgFMVpUJjwuXZVNClwximXpibKNFN4sZ0xoO/D/grdYcqp2DnI1OjxEGJ8nKIIG3Mf9c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.207 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f207.google.com with SMTP id e9e14a558f8ab-427621906beso145996245ab.3 for ; Tue, 30 Sep 2025 13:29:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759264172; x=1759868972; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=PwZGXRreT4dh1LQQqf850vLqtz1BFdUD5wU0nKR0gU0=; b=dWPS3egNLjWTwOc3PD4LUd4cUFkXCLiMALwRlmFcnLr+4Gqg5llEfpCmPkbjT6P8Ir DqudMNkF9Q7cJwHOOcryMYweArad+/l1C5J/00eZZStWyew2W+0r/2ao2J0DZeNOkE3b fYhz+RXUjufSnm4fHfTTIS6RQcLGG9SUt1IDOWpZra4tnCZHrhPQNe36P+GRQGsPyVmK 9dA4gP8c+Zgit9eHQNOUc3PZrcClw90xNz5PrZRkPKfBEeBlkfbTYBLhRstJejmPQBza GDwrHPkIHF1ibUkUn8qnHNCPe/RW/MgFu76Fb+opZ/cGrXZpUW3BsJxsnXoU5cZllb5W H4hw== X-Forwarded-Encrypted: i=1; AJvYcCUVKJ3rckj3UpO8pYnNPS6juX1ucIFLNlHx/c5AU0jekQWnwZ3RVYhXB2hYf7p1mOan6EHsqhLNqCNF6ho=@vger.kernel.org X-Gm-Message-State: AOJu0YwXeMtJ2SJVu6/iiIxzbwd7K66VTBC2FNDFFLNvQiDDrV09kWeR sOahNcVCqs5NWL+tjXzQdZGxLfhI2U1gsDeTTJyqbim9YwYUG9wllC4OpTjvw5MxpAq1PyPESvo aVu8RZEuN+YNqiN9hmyc/yd7Z27bZ/h6RU9tqKdR3Nf+mw2dBAy9ryqB1bgQ= X-Google-Smtp-Source: AGHT+IH0G7HvVsaEFQQ3avovgw55Cppirm/bVwCVV7M9ntN5teSIZwn4rXKTPEQBBjrreziX+bY2D4val9odavdG6PoGqniJzhQ/ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a23:b0:425:70c5:61b3 with SMTP id e9e14a558f8ab-42d81647952mr19723125ab.27.1759264172207; Tue, 30 Sep 2025 13:29:32 -0700 (PDT) Date: Tue, 30 Sep 2025 13:29:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68dc3dac.a00a0220.102ee.004f.GAE@google.com> Subject: [syzbot] [rdma?] KMSAN: uninit-value in ib_nl_handle_ip_res_resp From: syzbot To: jgg@ziepe.ca, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 1896ce8eb6c6 Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=153d0092580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6eca10e0cdef44f dashboard link: https://syzkaller.appspot.com/bug?extid=938fcd548c303fe33c1a compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d0fbab3c0b62/disk-1896ce8e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/71c7b444e106/vmlinux-1896ce8e.xz kernel image: https://storage.googleapis.com/syzbot-assets/96a4aa63999d/bzImage-1896ce8e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+938fcd548c303fe33c1a@syzkaller.appspotmail.com netlink: 8 bytes leftover after parsing attributes in process `syz.8.3246'. ===================================================== BUG: KMSAN: uninit-value in hex_byte_pack include/linux/hex.h:13 [inline] BUG: KMSAN: uninit-value in ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490 hex_byte_pack include/linux/hex.h:13 [inline] ip6_string+0xef4/0x13a0 lib/vsprintf.c:1490 ip6_addr_string+0x18a/0x3e0 lib/vsprintf.c:1509 ip_addr_string+0x245/0xee0 lib/vsprintf.c:1633 pointer+0xc09/0x1bd0 lib/vsprintf.c:2542 vsnprintf+0xf8a/0x1bd0 lib/vsprintf.c:2930 vprintk_store+0x3ae/0x1530 kernel/printk/printk.c:2279 vprintk_emit+0x307/0xcd0 kernel/printk/printk.c:2426 vprintk_default+0x3f/0x50 kernel/printk/printk.c:2465 vprintk+0x36/0x50 kernel/printk/printk_safe.c:82 _printk+0x17e/0x1b0 kernel/printk/printk.c:2475 ib_nl_process_good_ip_rsep drivers/infiniband/core/addr.c:128 [inline] ib_nl_handle_ip_res_resp+0x963/0x9d0 drivers/infiniband/core/addr.c:141 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0xefa/0x11c0 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x333/0x3d0 net/socket.c:729 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2617 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2671 __sys_sendmsg+0x1aa/0x300 net/socket.c:2703 __compat_sys_sendmsg net/compat.c:346 [inline] __do_compat_sys_sendmsg net/compat.c:353 [inline] __se_compat_sys_sendmsg net/compat.c:350 [inline] __ia32_compat_sys_sendmsg+0xa4/0x100 net/compat.c:350 ia32_sys_call+0x3f6c/0x4310 arch/x86/include/generated/asm/syscalls_32.h:371 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Local variable gid.i created at: ib_nl_process_good_ip_rsep drivers/infiniband/core/addr.c:102 [inline] ib_nl_handle_ip_res_resp+0x254/0x9d0 drivers/infiniband/core/addr.c:141 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0xefa/0x11c0 drivers/infiniband/core/netlink.c:259 CPU: 0 UID: 0 PID: 17455 Comm: syz.8.3246 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup