[pkg-lighttpd] Bug#471409: lighttpd: SEGV when daemon spawns child; clone() call segfaults

Simon Raven simon.raven at gmail.com
Tue Mar 18 01:38:16 UTC 2008

Package: lighttpd
Version: 1.4.19-1
Severity: normal


i'm filing this from an x86 box, but the bug is in PPC, i don't see this behaviour 
in x86. i've run the daemon through strace, and right when it spawns off a child with
clone(), the parent SEGVs, making the pid file for s-s-d, and other issues, go buggery.

a bit before, and a bit after what i said:

12428 rt_sigaction(SIGTTOU, {SIG_IGN}, {SIG_DFL}, 8) = 0
12428 rt_sigaction(SIGTTIN, {SIG_IGN}, {SIG_DFL}, 8) = 0
12428 rt_sigaction(SIGTSTP, {SIG_IGN}, {SIG_DFL}, 8) = 0
12428 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x4801c3e8) = 12429
12428 --- SIGSEGV (Segmentation fault) @ 0 (0) ---
12429 rt_sigaction(SIGPIPE, {SIG_IGN},  <unfinished ...>
12428 +++ killed by SIGSEGV +++
12429 <... rt_sigaction resumed> {SIG_DFL}, 8) = 0
12429 getsockname(11, {sa_family=AF_FILE, path=@}, [2]) = 0
12429 getpeername(11, {sa_family=AF_FILE, path="/var/run/slapd/ldapi"}, [23]) = 0
12429 fcntl64(11, F_GETFD)              = 0x1 (flags FD_CLOEXEC)

the bug has existed since a few package versions ago. i've tried backports, same problem.
as a consequnce of this bug, the package configuration fails.


-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: powerpc

Kernel: Linux
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lighttpd depends on:
ii  libattr1               1:2.4.41-1        Extended attribute shared library
ii  libbz2-1.0             1.0.4-4           high-quality block-sorting file co
ii  libc6                  2.7-9             GNU C Library: Shared libraries
ii  libgamin0 [libfam0]    0.1.9-2           Client library for the gamin file 
ii  libldap-2.4-2          2.4.7-6.1         OpenLDAP libraries
ii  libpcre3               7.6-2             Perl 5 Compatible Regular Expressi
ii  libssl0.9.8            0.9.8g-7          SSL shared libraries
ii  libterm-readline-perl- 1.0302-1          Perl implementation of Readline li
ii  lsb-base               3.2-4             Linux Standard Base 3.2 init scrip
ii  mime-support           3.40-1.1          MIME files 'mime.types' & 'mailcap
ii  zlib1g                 1: compression library - runtime

lighttpd recommends no packages.

-- no debconf information

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