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================================================================== BUG: KCSAN: data-race in ip_tunnel_xmit / ip_tunnel_xmit read-write to 0xffff8881373b51b8 of 8 bytes by task 31922 on cpu 0: ip_tunnel_xmit+0x602/0x11c0 net/ipv4/ip_tunnel.c:750 ipip_tunnel_xmit+0x252/0x2b0 net/ipv4/ipip.c:307 __netdev_start_xmit include/linux/netdevice.h:4805 [inline] netdev_start_xmit include/linux/netdevice.h:4819 [inline] xmit_one+0xc0/0x2a0 net/core/dev.c:3590 dev_hard_start_xmit+0x72/0x120 net/core/dev.c:3606 __dev_queue_xmit+0x84c/0xfe0 net/core/dev.c:4255 dev_queue_xmit include/linux/netdevice.h:2994 [inline] neigh_connected_output+0x266/0x2a0 net/core/neighbour.c:1557 neigh_output include/net/neighbour.h:549 [inline] ip_finish_output2+0x74d/0x850 net/ipv4/ip_output.c:228 ip_finish_output+0xf3/0x250 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0xf3/0x1a0 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:451 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0x6e/0xe0 net/ipv4/ip_output.c:1571 udp_send_skb+0x626/0x860 net/ipv4/udp.c:967 udp_sendmsg+0x114b/0x1200 net/ipv4/udp.c:1254 udpv6_sendmsg+0x64e/0x14a0 inet6_sendmsg+0x5f/0x80 net/ipv6/af_inet6.c:652 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x38f/0x500 net/socket.c:2488 ___sys_sendmsg net/socket.c:2542 [inline] __sys_sendmmsg+0x5c3/0x6a0 net/socket.c:2628 __do_sys_sendmmsg net/socket.c:2657 [inline] __se_sys_sendmmsg net/socket.c:2654 [inline] __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2654 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 read-write to 0xffff8881373b51b8 of 8 bytes by task 31935 on cpu 1: ip_tunnel_xmit+0x602/0x11c0 net/ipv4/ip_tunnel.c:750 ipip_tunnel_xmit+0x252/0x2b0 net/ipv4/ipip.c:307 __netdev_start_xmit include/linux/netdevice.h:4805 [inline] netdev_start_xmit include/linux/netdevice.h:4819 [inline] xmit_one+0xc0/0x2a0 net/core/dev.c:3590 dev_hard_start_xmit+0x72/0x120 net/core/dev.c:3606 __dev_queue_xmit+0x84c/0xfe0 net/core/dev.c:4255 dev_queue_xmit include/linux/netdevice.h:2994 [inline] neigh_connected_output+0x266/0x2a0 net/core/neighbour.c:1557 neigh_output include/net/neighbour.h:549 [inline] ip_finish_output2+0x74d/0x850 net/ipv4/ip_output.c:228 ip_finish_output+0xf3/0x250 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0xf3/0x1a0 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:451 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0x6e/0xe0 net/ipv4/ip_output.c:1571 udp_send_skb+0x626/0x860 net/ipv4/udp.c:967 udp_sendmsg+0x114b/0x1200 net/ipv4/udp.c:1254 udpv6_sendmsg+0x64e/0x14a0 inet6_sendmsg+0x5f/0x80 net/ipv6/af_inet6.c:652 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x38f/0x500 net/socket.c:2488 ___sys_sendmsg net/socket.c:2542 [inline] __sys_sendmmsg+0x5c3/0x6a0 net/socket.c:2628 __do_sys_sendmmsg net/socket.c:2657 [inline] __se_sys_sendmmsg net/socket.c:2654 [inline] __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2654 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 value changed: 0x0000000000005f43 -> 0x0000000000005f44 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 31935 Comm: syz-executor.3 Not tainted 5.19.0-rc4-syzkaller-00187-g089866061428-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2022/07/02 21:52 | upstream | 089866061428 | 1434eec0 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in ip_tunnel_xmit / ip_tunnel_xmit |