[Qemu-devel] sorecvfrom freezes guest

[llyzs]

Hi,

I am having a guest freeze issue (win10), and through debugging I found out
that sometimes sorecvfrom() is called from slirp.c because revents ==
G_IO_IN, however inside sorecvfrom() function, ioctlsocket() returns 0
bytes available and recvfrom could be blocking indefinitely. I am not sure
the root cause of the situation, but I added a non-blocking check to
recvfrom and it fixed my issue. My patch is as attached. Please check if
this is a right fix.

0001-socket-fix-blocking-udp-recvfrom.patch
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