From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f77.google.com (mail-io1-f77.google.com [209.85.166.77]) (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 09DA6280CE5 for ; Wed, 23 Jul 2025 14:45:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753281938; cv=none; b=IlqSZgBi9gs3c0XNOq8UkisFdvr6hS7uWMJjj41pqwNYJriIDoklXkUJDIxSC5Cy7FZv3HX2MK24igS1G1C96lP6tZN/LbzbMlsAhW2dSpZqHiwCL/BG6TMSlSZcLJ8q5EFOtK0AzfsRWa+ST+vYwIOSx0XPfqbtqtRT9PyiODs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753281938; c=relaxed/simple; bh=ytx5Wx3EuwngFK3Jxlb30QKnQtjx/IQhzvwLdRiJ5ZI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Fbsi75m8cxCK1+i0cDFCHQ3abhHD/g3icBY5q+OHbN/q+ZdEc2FVOQ0A54iwEqmjxleI1an0rzfxfM0LuNwq8OR1y2l57VUFa5AP4AgmYhR27DnGrV6b8EnYUDhrmBkAzEcK1gp4FEMZ5FjO7lh74xhnNtFfrUOZvlQ7KAaJ9JQ= 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=209.85.166.77 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-io1-f77.google.com with SMTP id ca18e2360f4ac-87c149362adso493207139f.3 for ; Wed, 23 Jul 2025 07:45:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1753281935; x=1753886735; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=6J0xr1uO+ygDWs1lqz1tpCMN0HmdwzS8B6enhcpsCHw=; b=JHgkv3OC6X8H387U3DB3c5KoXBfTK/lAJN9WTdNoCQbB7lxRLnskFlmUGbPTf0KI+g W27GBj57UaZpYZhwBMMN5M2Ifme1DBahRxlxTtSaAK9nsCYnyqa2aCsySV6REnWi4yhY o/Y7QLFi8Cik3PdzVOjBQ0FDYNcNnW4jEHOQT5MTPvaNlIsVXOQStWuSxX01wCDY9JT5 hvvTpNajJN0QheFHYwMOOJz02klpSUEn83uqOtoV7sHbM54nSMs9ZoWYGvDrel7DOkQV fNVj8qBfUaRKpclaLunj/okqzeUGOncixWrt8ko+5PxBeM6IvkFtcJ30PRZoAa/hNZx2 7umg== X-Forwarded-Encrypted: i=1; AJvYcCVjjfRPe9LPQfj8EqTKoyDatuq9Vpyn9IU27fpAF7PJ8WpmKkwicmnqtFhD8IKuEWLjKrtOyRVDBqPGUMg=@vger.kernel.org X-Gm-Message-State: AOJu0Yx/3nvj5t4G89PuSTYvQm1obeNxEX/9HN0f2OYF3z7HDw7fbZX/ 5W3aekXSIwMOfqoSiqzfwy1woAkFil6n12to1pQvP6WL4wNhKaSUTrUktvEa0hh5jNkHFy1bZ4p BFAjxqWelssAFhIGBNzlg5T6Zi9OK55ilMzXCWlYHxe8L/w1OWpv1rk74ndo= X-Google-Smtp-Source: AGHT+IHEO6vxWGYXkHxVFE0xnGLbD9LNiGLAjgXFVnLZRGGBzHfujx3JuOmvoNgTIWxWpn48UMjMmbRlei4fFNbsiiQlSbgVau1H Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:e55:b0:879:c608:d1d5 with SMTP id ca18e2360f4ac-87c6506e00bmr541701939f.14.1753281935005; Wed, 23 Jul 2025 07:45:35 -0700 (PDT) Date: Wed, 23 Jul 2025 07:45:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6880f58e.050a0220.248954.0001.GAE@google.com> Subject: [syzbot] [tipc?] KMSAN: uninit-value in tipc_rcv (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, jmaloy@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, tipc-discussion@lists.sourceforge.net Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4871b7cb27f4 Merge tag 'v6.16-rc6-smb3-client-fixes' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15bbe38c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5227c65742122bdd dashboard link: https://syzkaller.appspot.com/bug?extid=9a4fbb77c9d4aacd3388 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e2e34a7999ba/disk-4871b7cb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/834fdc8dbc07/vmlinux-4871b7cb.xz kernel image: https://storage.googleapis.com/syzbot-assets/617fadfb9a8e/bzImage-4871b7cb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9a4fbb77c9d4aacd3388@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in tipc_rcv+0x17fa/0x1ea0 net/tipc/node.c:2132 tipc_rcv+0x17fa/0x1ea0 net/tipc/node.c:2132 tipc_l2_rcv_msg+0x213/0x320 net/tipc/bearer.c:668 __netif_receive_skb_list_ptype net/core/dev.c:6025 [inline] __netif_receive_skb_list_core+0x133b/0x16b0 net/core/dev.c:6067 __netif_receive_skb_list net/core/dev.c:6119 [inline] netif_receive_skb_list_internal+0xee7/0x1530 net/core/dev.c:6210 gro_normal_list include/net/gro.h:532 [inline] napi_complete_done+0x3fb/0x7d0 net/core/dev.c:6580 napi_complete include/linux/netdevice.h:588 [inline] tun_get_user+0x4ac4/0x6b40 drivers/net/tun.c:1909 tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984 do_iter_readv_writev+0x94a/0xba0 fs/read_write.c:-1 vfs_writev+0x52a/0x1500 fs/read_write.c:1057 do_writev+0x1b5/0x580 fs/read_write.c:1103 __do_sys_writev fs/read_write.c:1171 [inline] __se_sys_writev fs/read_write.c:1168 [inline] __ia32_sys_writev+0x9c/0xf0 fs/read_write.c:1168 ia32_sys_call+0x3f2a/0x42c0 arch/x86/include/generated/asm/syscalls_32.h:147 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 Uninit was created at: slab_post_alloc_hook mm/slub.c:4154 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_node_noprof+0x818/0xf00 mm/slub.c:4249 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:579 __alloc_skb+0x347/0x7d0 net/core/skbuff.c:670 napi_alloc_skb+0xc1/0x740 net/core/skbuff.c:812 napi_get_frags+0xab/0x250 net/core/gro.c:673 tun_napi_alloc_frags drivers/net/tun.c:1404 [inline] tun_get_user+0x1246/0x6b40 drivers/net/tun.c:1772 tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984 do_iter_readv_writev+0x94a/0xba0 fs/read_write.c:-1 vfs_writev+0x52a/0x1500 fs/read_write.c:1057 do_writev+0x1b5/0x580 fs/read_write.c:1103 __do_sys_writev fs/read_write.c:1171 [inline] __se_sys_writev fs/read_write.c:1168 [inline] __ia32_sys_writev+0x9c/0xf0 fs/read_write.c:1168 ia32_sys_call+0x3f2a/0x42c0 arch/x86/include/generated/asm/syscalls_32.h:147 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 CPU: 0 UID: 0 PID: 15202 Comm: syz.3.3410 Not tainted 6.16.0-rc6-syzkaller-00253-g4871b7cb27f4 #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ===================================================== --- 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