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================================================================== BUG: KCSAN: data-race in do_tcp_setsockopt / tcp_stream_memory_free write to 0xffff888092b8e940 of 4 bytes by task 19867 on cpu 0: do_tcp_setsockopt+0x678/0x1a70 net/ipv4/tcp.c:3304 tcp_setsockopt+0x4c/0xa0 net/ipv4/tcp.c:3335 sock_common_setsockopt+0x5d/0x70 net/core/sock.c:3247 __sys_setsockopt+0x2dc/0x450 net/socket.c:2132 __do_sys_setsockopt net/socket.c:2143 [inline] __se_sys_setsockopt net/socket.c:2140 [inline] __x64_sys_setsockopt+0x62/0x70 net/socket.c:2140 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888092b8e940 of 4 bytes by task 19894 on cpu 1: tcp_notsent_lowat include/net/tcp.h:1972 [inline] tcp_stream_memory_free+0x45/0xb0 include/net/tcp.h:1985 __sk_stream_memory_free include/net/sock.h:1274 [inline] sk_stream_memory_free include/net/sock.h:1279 [inline] sk_stream_wait_memory+0x4bb/0x6e0 net/core/stream.c:145 tcp_sendmsg_locked+0x8a5/0x2200 net/ipv4/tcp.c:1401 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1441 inet_sendmsg+0x5f/0x80 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] __sys_sendto+0x2ae/0x380 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto net/socket.c:2000 [inline] __x64_sys_sendto+0x74/0x90 net/socket.c:2000 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: 19894 Comm: syz-executor.3 Not tainted 5.9.0-rc2-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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/08/26 20:19 | upstream | 2ac69819ba9e | 318430cb | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2020/08/26 09:25 | upstream | 2ac69819ba9e | 344da168 | .config | console log | report | ci2-upstream-kcsan-gce |