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================================================================== BUG: KCSAN: data-race in tcp_sendmsg_locked / tcp_stream_memory_free read to 0xffff8880ad623bfc of 4 bytes by task 16016 on cpu 1: tcp_stream_memory_free+0x29/0xc0 include/net/tcp.h:1919 __sk_stream_memory_free include/net/sock.h:1214 [inline] __sk_stream_memory_free include/net/sock.h:1208 [inline] __sk_stream_is_writeable include/net/sock.h:1225 [inline] sk_stream_is_writeable include/net/sock.h:1230 [inline] tcp_poll+0x49a/0x6b0 net/ipv4/tcp.c:558 sock_poll+0xed/0x250 net/socket.c:1256 vfs_poll include/linux/poll.h:90 [inline] do_select+0x7d0/0x1020 fs/select.c:534 core_sys_select+0x381/0x550 fs/select.c:677 do_pselect.constprop.0+0x11d/0x160 fs/select.c:759 __do_sys_pselect6 fs/select.c:784 [inline] __se_sys_pselect6 fs/select.c:769 [inline] __x64_sys_pselect6+0x12e/0x170 fs/select.c:769 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8880ad623bfc of 4 bytes by task 16011 on cpu 0: tcp_sendmsg_locked+0xd51/0x1f30 net/ipv4/tcp.c:1365 tcp_sendmsg+0x39/0x60 net/ipv4/tcp.c:1434 inet_sendmsg+0x6d/0x90 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:657 __sys_sendto+0x21f/0x320 net/socket.c:1952 __do_sys_sendto net/socket.c:1964 [inline] __se_sys_sendto net/socket.c:1960 [inline] __x64_sys_sendto+0x89/0xb0 net/socket.c:1960 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: 0 PID: 16011 Comm: syz-executor.0 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/10/26 14:26 | https://github.com/google/ktsan.git kcsan | 05f2236801fe | 25bb509e | .config | console log | report | ci2-upstream-kcsan-gce | |||||
2019/10/23 20:41 | https://github.com/google/ktsan.git kcsan | 05f2236801fe | b602d64b | .config | console log | report | ci2-upstream-kcsan-gce |