[gentoo-embedded] uclibc "emerge sync" segfaults

[Natanael Copa]

I just came back from a longweekend and wanted to check out what was new.

But emerge sync segfaulted.
Here is the strace:

open("/etc/resolv.conf", O_RDONLY)      = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0xbfffae14) = -1 ENOTTY 
(Inappropriate ioctl for device)
read(3, "search nor.wtbts.org\nnameserver "..., 4096) = 43
read(3, "", 4096)                       = 0
close(3)                                = 0
open("/etc/hosts", O_RDONLY)            = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0xbfffae4c) = -1 ENOTTY 
(Inappropriate ioctl for device)
read(3, "# /etc/hosts:  This file describ"..., 4096) = 677
read(3, "", 4096)                       = 0
close(3)                                = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 3
connect(3, {sa_family=AF_INET, sin_port=htons(53), 
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
send(3, "\0\2\1\0\0\1\0\0\0\0\0\0\5rsync\6gentoo\3org\0\0\1"..., 34, 0) = 34
select(4, [3], NULL, NULL, {10, 0})     = 1 (in [3], left {10, 0})
recv(3, "\0\2\201\200\0\1\0\5\0\2\0\2\5rsync\6gentoo\3org\0\0\1"..., 
512, 0) = 198
close(3)                                = 0
open("/etc/hosts", O_RDONLY)            = 3
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0xbfffafc8) = -1 ENOTTY 
(Inappropriate ioctl for device)
read(3, "# /etc/hosts:  This file describ"..., 4096) = 677
read(3, "", 4096)                       = 0
close(3)                                = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 3
connect(3, {sa_family=AF_INET, sin_port=htons(53), 
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
send(3, "\0\3\1\0\0\1\0\0\0\0\0\0\5rsync\6gentoo\3org\0\0\1"..., 34, 0) = 34
select(4, [3], NULL, NULL, {10, 0})     = 1 (in [3], left {10, 0})
recv(3, "\0\3\201\200\0\1\0\5\0\2\0\2\5rsync\6gentoo\3org\0\0\1"..., 
512, 0) = 198
close(3)                                = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
root@nc / #

So, emerge segfaults directly after it does the DNS lookup for 
"rsync.gentoo.org" (I run a DNS proxy on 127.0.0.1)

I guess there is a bug in libresolv in uclibc


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