My /etc/conf.d/local.start contains the line 'aumix -L >/dev/null'. When this executes at startup time, I get a segfault. When the same command is run later, no segfault occurs. I'm using glibc-2.3.4.20040619 with nptl enabled, gcc-3.3.3-r6, kernel gentoo-dev-sources-2.6.7-r11, alsa, udev only system. Alsa oss-emulation modules preloaded (otherwise /dev/dsp, /dev/mixer, etc. not generated), aumix-2.8-r1, linux-headers-2.6.6-r1. glibc, bash, aumix, etc. were recompiled with current linux-headers. Reproducible: Always Steps to Reproduce: 1.Add 'aumix -L >/dev/null' to /etc/conf.d/local.start 2. 3. Actual Results: segfault opening /dev/mixer (see strace) Expected Results: no segfault emerge info Portage 2.0.50-r9 (default-x86-2004.0, gcc-3.3.3, glibc-2.3.4.20040619-r0, 2.6.7-gentoo-r11) ================================================================= System uname: 2.6.7-gentoo-r11 i686 Intel(R) Pentium(R) 4 CPU 2.40GHz Gentoo Base System version 1.5.1 ccache version 2.3 [enabled] Autoconf: sys-devel/autoconf-2.59-r4 Automake: sys-devel/automake-1.8.5-r1 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CFLAGS="-O2 -pipe -march=i686 -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -pipe -march=i686 -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache sandbox" GENTOO_MIRRORS="ftp://gentoo.ccccom.com http://mirror.datapipe.net/gentoo http://gentoo.osuosl.org/ ftp://ftp.ussg.iu.edu/pub/linux/gentoo http://mirror.datapipe.net/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/portage_overlay" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X acpi alsa apache2 apm avi berkdb cdr crypt cups doc dvdr encode esd foomaticdb gdbm gif gnome gpm gtk gtk2 imlib java jpeg kde libg++ libwww mad mikmod motif mozilla mpeg mysql ncurses nls nptl oggvorbis opengl oss pam pdflib perl png postgres ppds python qt quicktime readline samba scanner sdl slang spell ssl svga tcltk tcpd tiff truetype usb x86 xml2 xmms xv zlib"
Strace extract prior to failure ---- open("/lib/libz.so.1", O_RDONLY) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300\23"..., 512) = 512 fstat64(3, {st_mode=S_IFREG|0755, st_size=65800, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40 7fc000 mmap2(NULL, 67612, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x407 fd000 mmap2(0x4080d000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRIT E, 3, 0xf) = 0x4080d000 close(3) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40 80e000 set_thread_area({entry_number:-1 -> 6, base_addr:0x4080e350, limit:1048575, seg_ 32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, usea ble:1}) = 0 munmap(0x40017000, 91633) = 0 open("/dev/urandom", O_RDONLY) = 3 read(3, "\374E\330=", 4) = 4 close(3) = 0 brk(0) = 0x8055000 brk(0x8076000) = 0x8076000 brk(0) = 0x8076000 open("/dev/mixer", O_RDWR) = 3 ioctl(3, 0x80044dfe, 0x8054790) = 0 ioctl(3, 0x80044dfd, 0x8054794) = 0 ioctl(3, 0x80044dff, 0x8054798) = 0 ioctl(3, 0x80044dfb, 0x805479c) = 0 --- SIGSEGV (Segmentation fault) @ 0 (0) --- +++ killed by SIGSEGV +++
strace after system up and running (successful) ----- open("/lib/libz.so.1", O_RDONLY) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300\23"..., 512) = 512 fstat64(3, {st_mode=S_IFREG|0755, st_size=65800, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40 7fc000 mmap2(NULL, 67612, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x407 fd000 mmap2(0x4080d000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRIT E, 3, 0xf) = 0x4080d000 close(3) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40 80e000 set_thread_area({entry_number:-1 -> 6, base_addr:0x4080e350, limit:1048575, seg_ 32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, usea ble:1}) = 0 munmap(0x40017000, 91633) = 0 open("/dev/urandom", O_RDONLY) = 3 read(3, "\233.\264Q", 4) = 4 close(3) = 0 brk(0) = 0x8055000 brk(0x8076000) = 0x8076000 brk(0) = 0x8076000 open("/dev/mixer", O_RDWR) = 3 ioctl(3, 0x80044dfe, 0x8054790) = 0 ioctl(3, 0x80044dfd, 0x8054794) = 0 ioctl(3, 0x80044dff, 0x8054798) = 0 ioctl(3, 0x80044dfb, 0x805479c) = 0 ==> note: no segfault this time stat64("/home/collins/.aumixrc", {st_mode=S_IFREG|0644, st_size=157, ...}) = 0 open("/home/collins/.aumixrc", O_RDONLY) = 4
Please delete this duplicate - generated in error by system (not me) when 57251 was submitted.
Ignore last update - not a duplicate
In case this is a udev problem, I'm using udev-030,hotplug-20040401, hotplug-base-20040401.
what happens when you add aumix to your default runlevel to save/restore mixer settings? Does that segfault as well?
I don't understand your suggestion. local.start is the last thing executed in the default runlevel. Please clarify.
rc-update add aumix reboot does init.d/aumix cause a segfault? sorry for being unclear
Thanks for the clarification. Interestingly enough, when started in this manner, aumix does not segfault! Note, /etc/aumixrc does exist. So the basic difference is direct execution of aumix as opposed to running aumix from a 'source /etc/conf.d/local.start' statement in the case where it segfaults. Any problems with bash? I'll try re-emerging it.
Same results after re-emerging bash. I put the same code (source ...) temporarily in /etc/init.d/aumix, and it also segfaults there. Something not kosher about source from a runscript? At least I have a workaround. Thanks for your help.
Got it. From src/common.c: if (save_filename == NULL) { home = getenv("HOME"); if ((strlen(home) + strlen(AUMIXRC) + 2) < PATH_MAX) { sprintf(filename, "%s/.%s", home, AUMIXRC); setfile = CheckAndOpen(filename, mode); } ... aumix expects HOME to be set and crashes otherwise (home == NULL). Bug triggered only when not using the -f option ("save_filename == NULL"). anyone care to report to the author, a patch should be something like this --- src/common.c.orig 2004-07-22 00:55:48.956626016 +0200 +++ src/common.c 2004-07-22 00:55:59.317050992 +0200 @@ -591,7 +591,7 @@ char filename[PATH_MAX]; if (save_filename == NULL) { home = getenv("HOME"); - if ((strlen(home) + strlen(AUMIXRC) + 2) < PATH_MAX) { + if (home && (strlen(home) + strlen(AUMIXRC) + 2) < PATH_MAX) { sprintf(filename, "%s/.%s", home, AUMIXRC); setfile = CheckAndOpen(filename, mode); }
oh god... that's insane. thanks for finding it =) Have you sent the patch upstream? If not, I can do it. Thanks.
Not sent upstream yet, please do (hoping there's someone still alive there, last release was in november 2002).
fixed in portage. thanks.
