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__ifreq() bug in current cvs

After last memory handling fix in libc/sysdeps/unix/sysv/linux/ifreq.c,
__ifreq() doesn't return proper data in buffer - because after realloc
__ioctl is called on old buffer (NULL in most cases).

Userland testcase can be e.g. "hostname -d" with "reorder on" in
host.conf - __ifreq bug triggers assert in res_hconf.c:589, when
realloc() returns NULL because 0 usable interfaces were found.

One of possible ways to fix is attached.


-- 
Jakub Bogusz    http://cyber.cs.net.pl/~qboosh/

Attachment: glibc-ifreq.patch
Description: Text document

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