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================================================================== BUG: KCSAN: data-race in __ip6_make_skb / do_ipv6_setsockopt.isra.0 write to 0xffff8881239704ee of 2 bytes by task 12628 on cpu 0: do_ipv6_setsockopt.isra.0+0x1a89/0x2c10 net/ipv6/ipv6_sockglue.c:799 ipv6_setsockopt+0xd1/0x130 net/ipv6/ipv6_sockglue.c:944 udpv6_setsockopt+0x71/0xc0 net/ipv6/udp.c:1565 sock_common_setsockopt+0x67/0x90 net/core/sock.c:3147 __sys_setsockopt+0x1ce/0x370 net/socket.c:2084 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt net/socket.c:2097 [inline] __x64_sys_setsockopt+0x70/0x90 net/socket.c:2097 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881239704ef of 1 bytes by task 12645 on cpu 1: ip6_autoflowlabel net/ipv6/ip6_output.c:183 [inline] __ip6_make_skb+0x900/0xf60 net/ipv6/ip6_output.c:1761 ip6_make_skb+0x211/0x300 net/ipv6/ip6_output.c:1880 udpv6_sendmsg+0x18b8/0x1c20 net/ipv6/udp.c:1465 inet6_sendmsg+0x6d/0x90 net/ipv6/af_inet6.c:576 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:657 ___sys_sendmsg+0x2b7/0x5d0 net/socket.c:2311 __sys_sendmmsg+0x123/0x350 net/socket.c:2413 __do_sys_sendmmsg net/socket.c:2442 [inline] __se_sys_sendmmsg net/socket.c:2439 [inline] __x64_sys_sendmmsg+0x64/0x80 net/socket.c:2439 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 12645 Comm: syz-executor.5 Not tainted 5.4.0-rc3+ #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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/10/24 21:15 | https://github.com/google/ktsan.git kcsan | 05f2236801fe | d01bb02a | .config | console log | report | ci2-upstream-kcsan-gce |