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Bugzilla – Full Text Bug Listing |
| Summary: | Glibc update to 2.27 causes segfault during name resolution | ||
|---|---|---|---|
| Product: | [openSUSE] openSUSE Tumbleweed | Reporter: | James Smith <smithjd15> |
| Component: | Upgrade Problems | Assignee: | E-mail List <bnc-team-screening> |
| Status: | RESOLVED DUPLICATE | QA Contact: | Jiri Srain <jsrain> |
| Severity: | Critical | ||
| Priority: | P5 - None | CC: | afaerber, agraf, forgotten_BUDQVzyqB-, mbrugger, schwab, tuliom |
| Version: | Current | ||
| Target Milestone: | --- | ||
| Hardware: | aarch64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Found By: | --- | Services Priority: | |
| Business Priority: | Blocker: | --- | |
| Marketing QA Status: | --- | IT Deployment: | --- |
| Bug Depends on: | |||
| Bug Blocks: | 1084812 | ||
| Attachments: | dmesg output | ||
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Description
James Smith
2018-03-08 04:39:01 UTC
Created attachment 763050 [details]
dmesg output
Yes. Same here. Also aarch64. Name resolution via glibc/gethostbyname() is segfaulting (sometimes depending on which hostname is being queried). nslookup/dig (via lwres) is unaffected. To reproduce: ========= # ping download.opensuse.org Segmentation fault (core dumped) # nslookup download.opensuse.org Server: 192.168.178.1 Address: 192.168.178.1#53 Non-authoritative answer: Name: download.opensuse.org Address: 195.135.221.134 Name: download.opensuse.org Address: 2001:67c:2178:8::13 # ping 195.135.221.134 PING 195.135.221.134 (195.135.221.134) 56(84) bytes of data. 64 bytes from 195.135.221.134: icmp_seq=1 ttl=54 time=33.0 ms 64 bytes from 195.135.221.134: icmp_seq=2 ttl=54 time=26.8 ms ... # ping 2001:67c:2178:8::13 PING 2001:67c:2178:8::13(2001:67c:2178:8::13) 56 data bytes 64 bytes from 2001:67c:2178:8::13: icmp_seq=1 ttl=53 time=25.5 ms 64 bytes from 2001:67c:2178:8::13: icmp_seq=2 ttl=53 time=24.2 ms ... ========= # gdb ping GNU gdb (GDB; openSUSE Tumbleweed) 8.0.1 (gdb) run download.opensuse.org Program received signal SIGSEGV, Segmentation fault. 0x0000ffffbdf1400c in gaih_getanswer_slice.isra () from /lib64/libnss_dns.so.2 (gdb) bt #0 0x0000ffffbdf1400c in gaih_getanswer_slice.isra () from /lib64/libnss_dns.so.2 #1 0x0000ffffbdf149dc in _nss_dns_gethostbyname4_r () from /lib64/libnss_dns.so.2 #2 0x0000ffffbe148780 in gaih_inet.constprop () from /lib64/libc.so.6 #3 0x0000ffffbe149330 in getaddrinfo () from /lib64/libc.so.6 #4 0x0000aaaae427e230 in ?? () #5 0x0000ffffbe0a86e0 in __libc_start_main () from /lib64/libc.so.6 #6 0x0000aaaae427ed04 in ?? () ========= glibc-2.27-1.1.aarch64: fails glibc-2.26-9.3.aarch64: okay ========= This also skews the update mechanism (download.opensuse.org, ftp.gwdg.de, etc. won't resolve, either). The obvious workaround is disabling dns lookup in /etc/nsswitch.conf, adding the relevant IP addresses and hostnames to /etc/hosts and restarting nscd. The intermediate fix by Stefan Brüns in #1084812 (https://bugzilla.opensuse.org/show_bug.cgi?id=1084812#c4) works for me, too. Thanks a lot! I'd consider this bug a duplicate to #1084812. Mark as duplicate of bas#1084812 now, thanks. *** This bug has been marked as a duplicate of bug 1084812 *** |