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================================================================== BUG: KCSAN: data-race in __ip6_datagram_connect / ip6_sk_dst_lookup_flow write to 0xffff8880af6c1ac0 of 4 bytes by task 4786 on cpu 0: __ipv6_addr_set_half include/net/ipv6.h:560 [inline] ipv6_addr_set include/net/ipv6.h:569 [inline] ipv6_addr_set_v4mapped include/net/ipv6.h:737 [inline] __ip6_datagram_connect+0x1a0/0x900 net/ipv6/datagram.c:197 ip6_datagram_connect+0x2a/0x40 net/ipv6/datagram.c:272 inet_dgram_connect+0x115/0x200 net/ipv4/af_inet.c:577 __sys_connect_file net/socket.c:1852 [inline] __sys_connect+0x245/0x280 net/socket.c:1869 __do_sys_connect net/socket.c:1879 [inline] __se_sys_connect net/socket.c:1876 [inline] __x64_sys_connect+0x3d/0x50 net/socket.c:1876 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880af6c1ac0 of 8 bytes by task 4792 on cpu 1: ipv6_addr_equal include/net/ipv6.h:579 [inline] ip6_rt_check net/ipv6/ip6_output.c:951 [inline] ip6_sk_dst_check net/ipv6/ip6_output.c:987 [inline] ip6_sk_dst_lookup_flow+0x250/0x600 net/ipv6/ip6_output.c:1190 udpv6_sendmsg+0x12cd/0x1780 net/ipv6/udp.c:1506 inet6_sendmsg+0x5f/0x80 net/ipv6/af_inet6.c:638 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0x360/0x4d0 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmmsg+0x322/0x4b0 net/socket.c:2497 __do_sys_sendmmsg net/socket.c:2526 [inline] __se_sys_sendmmsg net/socket.c:2523 [inline] __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2523 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 4792 Comm: syz-executor.3 Not tainted 5.9.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/09/01 21:04 | upstream | b51594df17d0 | abf9ba4f | .config | console log | report | ci2-upstream-kcsan-gce |