From: syzbot <syzbot+b834a6b2decad004cfa1@syzkaller.appspotmail.com>
To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
linux-kernel@vger.kernel.org, martineau@kernel.org,
matthieu.baerts@tessares.net, matttbe@kernel.org,
mptcp@lists.linux.dev, netdev@vger.kernel.org,
pabeni@redhat.com, syzkaller-bugs@googlegroups.com
Subject: [syzbot] [mptcp?] KMSAN: uninit-value in mptcp_incoming_options
Date: Wed, 22 Nov 2023 07:43:23 -0800 [thread overview]
Message-ID: <000000000000545a26060abf943b@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: c2d5304e6c64 Merge tag 'platform-drivers-x86-v6.7-2' of gi..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1536e3d4e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=e32016b84cf917ca
dashboard link: https://syzkaller.appspot.com/bug?extid=b834a6b2decad004cfa1
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11469724e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13934aaf680000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/23ea827adf3b/disk-c2d5304e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0f964ac588f5/vmlinux-c2d5304e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b061be889285/bzImage-c2d5304e.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b834a6b2decad004cfa1@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in mptcp_incoming_options+0xc93/0x3a80 net/mptcp/options.c:1197
mptcp_incoming_options+0xc93/0x3a80 net/mptcp/options.c:1197
tcp_data_queue+0xb4/0x7f20 net/ipv4/tcp_input.c:5141
tcp_rcv_established+0x1132/0x2600 net/ipv4/tcp_input.c:6155
tcp_v4_do_rcv+0x8a8/0xff0 net/ipv4/tcp_ipv4.c:1906
tcp_v4_rcv+0x4ce0/0x51a0 net/ipv4/tcp_ipv4.c:2329
ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x2b8/0x440 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:461 [inline]
ip_rcv_finish net/ipv4/ip_input.c:449 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_rcv+0x476/0x770 net/ipv4/ip_input.c:569
__netif_receive_skb_one_core net/core/dev.c:5529 [inline]
__netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5643
process_backlog+0x480/0x8b0 net/core/dev.c:5971
__napi_poll+0xe3/0x970 net/core/dev.c:6533
napi_poll net/core/dev.c:6602 [inline]
net_rx_action+0x884/0x16d0 net/core/dev.c:6735
__do_softirq+0x1b7/0x7c3 kernel/softirq.c:553
do_softirq+0x9a/0xf0 kernel/softirq.c:454
__local_bh_enable_ip+0x99/0xa0 kernel/softirq.c:381
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:817 [inline]
__dev_queue_xmit+0x24ff/0x5130 net/core/dev.c:4373
dev_queue_xmit include/linux/netdevice.h:3112 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0x14be/0x1b40 net/ipv4/ip_output.c:235
__ip_finish_output+0x266/0x720
ip_finish_output+0x4b/0x550 net/ipv4/ip_output.c:323
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip_output+0x15f/0x3e0 net/ipv4/ip_output.c:433
dst_output include/net/dst.h:451 [inline]
ip_local_out net/ipv4/ip_output.c:129 [inline]
__ip_queue_xmit+0x1c02/0x1e00 net/ipv4/ip_output.c:535
ip_queue_xmit+0x60/0x80 net/ipv4/ip_output.c:549
__tcp_transmit_skb+0x3b26/0x4c40 net/ipv4/tcp_output.c:1462
tcp_transmit_skb net/ipv4/tcp_output.c:1480 [inline]
tcp_write_xmit+0x3e0f/0x8940 net/ipv4/tcp_output.c:2792
__tcp_push_pending_frames+0xc4/0x380 net/ipv4/tcp_output.c:2977
tcp_push+0x755/0x7a0 net/ipv4/tcp.c:736
mptcp_push_release net/mptcp/protocol.c:1489 [inline]
__mptcp_push_pending+0x8bc/0xde0 net/mptcp/protocol.c:1624
mptcp_sendmsg+0x1e90/0x2300 net/mptcp/protocol.c:1890
inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584
___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638
__sys_sendmmsg+0x3c4/0x950 net/socket.c:2724
__do_sys_sendmmsg net/socket.c:2753 [inline]
__se_sys_sendmmsg net/socket.c:2750 [inline]
__x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2750
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Uninit was stored to memory at:
mptcp_parse_option net/mptcp/options.c:110 [inline]
mptcp_get_options+0x2d86/0x2e60 net/mptcp/options.c:396
mptcp_incoming_options+0x124/0x3a80 net/mptcp/options.c:1139
tcp_data_queue+0xb4/0x7f20 net/ipv4/tcp_input.c:5141
tcp_rcv_established+0x1132/0x2600 net/ipv4/tcp_input.c:6155
tcp_v4_do_rcv+0x8a8/0xff0 net/ipv4/tcp_ipv4.c:1906
tcp_v4_rcv+0x4ce0/0x51a0 net/ipv4/tcp_ipv4.c:2329
ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x2b8/0x440 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:461 [inline]
ip_rcv_finish net/ipv4/ip_input.c:449 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_rcv+0x476/0x770 net/ipv4/ip_input.c:569
__netif_receive_skb_one_core net/core/dev.c:5529 [inline]
__netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5643
process_backlog+0x480/0x8b0 net/core/dev.c:5971
__napi_poll+0xe3/0x970 net/core/dev.c:6533
napi_poll net/core/dev.c:6602 [inline]
net_rx_action+0x884/0x16d0 net/core/dev.c:6735
__do_softirq+0x1b7/0x7c3 kernel/softirq.c:553
Local variable mp_opt created at:
mptcp_incoming_options+0x9b/0x3a80 net/mptcp/options.c:1116
tcp_data_queue+0xb4/0x7f20 net/ipv4/tcp_input.c:5141
CPU: 0 PID: 5031 Comm: syz-executor376 Not tainted 6.7.0-rc2-syzkaller-00014-gc2d5304e6c64 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
=====================================================
---
This report is generated by a bot. It may contain errors.
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next reply other threads:[~2023-11-22 15:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-22 15:43 syzbot [this message]
2023-11-23 0:48 ` [syzbot] [mptcp?] KMSAN: uninit-value in mptcp_incoming_options Kuniyuki Iwashima
2023-11-23 1:17 ` syzbot
2023-11-23 8:00 ` Paolo Abeni
2023-11-23 1:23 ` [PATCH] mptcp: fix " Edward Adam Davis
2023-11-23 16:41 ` Paolo Abeni
2023-11-24 11:05 ` Edward Adam Davis
2023-11-24 15:00 ` patchwork-bot+netdevbpf
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