1be86fae15
When trying to resolve DNS names into IP addresses, the DNS code fails from time to time with the following error: -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- error: ../../grub-core/net/dns.c:688:no DNS record found. -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- This happens when both IPv4 and IPv6 queries are performed against the DNS server (e.g. 8.8.8.8) but there is no IP returned for IPv6 query, as shown below: -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- grub> net_del_dns 192.168.122.1 grub> net_add_dns 8.8.8.8 grub> net_nslookup ipv4.test-ipv6.com error: ../../grub-core/net/dns.c:688:no DNS record found. grub> net_nslookup ipv4.test-ipv6.com 216.218.228.115 -------- 8< ---------------- 8< ---------------- 8< ---------------- 8< -------- The root cause is the code exiting prematurely when the data->addresses buffer has been allocated in recv_hook(), even if there was no address returned last time recv_hook() executed. Signed-off-by: Renaud Métrich <rmetrich@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'