r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000080)='/proc/zoneinfo\x00', 0x0, 0x0)
r1 = socket$inet6_tcp(0xa, 0x1, 0x0)
setsockopt$inet6_tcp_TCP_REPAIR(r1, 0x6, 0x13, &(0x7f0000000000)=0x1, 0x4)
connect$inet6(r1, &(0x7f0000000040)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @dev}}, 0x1c)
r2 = fcntl$dupfd(r1, 0x0, r1)
setsockopt$inet6_tcp_TCP_REPAIR_QUEUE(r2, 0x6, 0x14, &(0x7f0000000100)=0x2, 0x4)
sendfile(r2, r0, 0x0, 0x4000000000000)