pstree (as part of sys-apps/psmisc) segfaults when I give it a username and run it as a user. (In these examples, "drew" is a user on my system). Logged in as a user, this fails: $ pstree drew Logged in as a user, these succeed: $ pstree $ pstree 27946 Logged in as root, these succeed: $ pstree $ pstree 27946 $ pstree drew Here's the output of 'emerge info sys-apps/psmisc': Portage 2.0.47-r10 (default-x86-1.4, gcc-3.2.2, glibc-2.3.1-r4) ================================================================= System uname: 2.4.20-gentoo-r2 i686 Intel(R) Pentium(R) III CPU family 1133MHz GENTOO_MIRRORS="http://gentoo.oregonstate.edu/ http://distro.ibiblio.org/pub/Linux/distributions/gentoo" CONFIG_PROTECT="/etc /var/qmail/control /usr/share/config /usr/kde/2/share/config /usr/kde/3/share/config /opt/tomcat/conf" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" PORTDIR="/usr/portage" DISTDIR="/usr/portage/distfiles" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR_OVERLAY="" USE="x86 3dnow apm crypt cups encode libg++ mmx ncurses spell xml2 zlib gdbm berkdb slang readline java gpm tcpd pam libwww ssl python snmp -arts -avi cdr -gif -gnome -gtk imap -imlib innodb ipv6 -jpeg junit -kde maildir -mikmod -motif -mpeg mysql -nls odbc -oggvorbis -opengl -oss -pdflib perl -png -qt -quicktime -sdl sse -svga -truetype -X -xmms -xv" COMPILER="gcc3" CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium3 -O3 -pipe -mfpmath=sse -falign-functions=4" CXXFLAGS="-march=pentium3 -O3 -pipe -mfpmath=sse -falign-functions=4" ACCEPT_KEYWORDS="x86" MAKEOPTS="-j2" AUTOCLEAN="yes" SYNC="rsync://rsync.gentoo.org/gentoo-portage" FEATURES="sandbox ccache"
This is with version 21.2-r1 of sys-apps/psmisc.
Hrm, worked OK here... I'm going to test a few things to see if it might be a cflags issue of some sort.
Nope, with a superset of your flags and mine, and with no cflags it still worked fine here
Drew: run a "strace pstree drew" and give us the last dozen lines, perhaps that'll help us define where the problem is situated.
read(4, "19463 (strace) S 17477 19463 174"..., 8192) = 207 read(4, "", 4096) = 0 close(4) = 0 munmap(0x41093000, 4096) = 0 open("/proc/19464/stat", O_RDONLY|O_LARGEFILE) = 4 stat64("/proc/19464", {st_mode=S_IFDIR|0500, st_size=0, ...}) = 0 fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x41093000 read(4, "19464 (pstree) R 19463 19463 174"..., 8192) = 188 read(4, "", 4096) = 0 close(4) = 0 munmap(0x41093000, 4096) = 0 getdents64(0x3, 0x804c588, 0x2000, 0x19) = 0 close(3) = 0 --- SIGSEGV (Segmentation fault) --- +++ killed by SIGSEGV +++
Hmm... heres a backtrace from gdb. It might be useful even though there are no debugging symbols: #0 0x08049ab7 in strcpy () #1 0x3ea94af3 in ?? () #2 0x0804a57a in strcpy () #3 0x42b94dc4 in __libc_start_main () from /lib/libc.so.6
do you happen to use grsecurity or other special kernel security features?
Yes, quite a few of them. From /proc/config: CONFIG_GRKERNSEC=y CONFIG_GRKERNSEC_CUSTOM=y CONFIG_GRKERNSEC_PAX_ASLR=y CONFIG_GRKERNSEC_PAX_RANDMMAP=y CONFIG_GRKERNSEC_IO=y CONFIG_GRKERNSEC_PROC_MEMMAP=y CONFIG_GRKERNSEC_ACL_MAXTRIES=3 CONFIG_GRKERNSEC_ACL_TIMEOUT=30 CONFIG_GRKERNSEC_PROC=y CONFIG_GRKERNSEC_PROC_USER=y CONFIG_GRKERNSEC_PROC_ADD=y CONFIG_GRKERNSEC_LINK=y CONFIG_GRKERNSEC_FIFO=y CONFIG_GRKERNSEC_CHROOT=y CONFIG_GRKERNSEC_CHROOT_MOUNT=y CONFIG_GRKERNSEC_CHROOT_DOUBLE=y CONFIG_GRKERNSEC_CHROOT_PIVOT=y CONFIG_GRKERNSEC_CHROOT_CHDIR=y CONFIG_GRKERNSEC_CHROOT_CHMOD=y CONFIG_GRKERNSEC_CHROOT_FCHDIR=y CONFIG_GRKERNSEC_CHROOT_MKNOD=y CONFIG_GRKERNSEC_CHROOT_SHMAT=y CONFIG_GRKERNSEC_CHROOT_UNIX=y CONFIG_GRKERNSEC_CHROOT_FINDTASK=y CONFIG_GRKERNSEC_CHROOT_NICE=y CONFIG_GRKERNSEC_CHROOT_SYSCTL=y CONFIG_GRKERNSEC_CHROOT_CAPS=y CONFIG_GRKERNSEC_RESLOG=y CONFIG_GRKERNSEC_AUDIT_MOUNT=y CONFIG_GRKERNSEC_SIGNAL=y CONFIG_GRKERNSEC_TIME=y CONFIG_GRKERNSEC_DMESG=y CONFIG_GRKERNSEC_RANDPID=y CONFIG_GRKERNSEC_RANDNET=y CONFIG_GRKERNSEC_RANDISN=y CONFIG_GRKERNSEC_RANDID=y CONFIG_GRKERNSEC_RANDSRC=y CONFIG_GRKERNSEC_RANDRPC=y CONFIG_GRKERNSEC_RANDPING=y CONFIG_GRKERNSEC_SYSCTL=y CONFIG_GRKERNSEC_FLOODTIME=10 CONFIG_GRKERNSEC_FLOODBURST=4
I just upgraded to the lasted stable version (3.1.8) and it's still segfaulting in the same way.
Hmm... this appears to be working now, using sys-apps/psmisc-21.2-r2. I'm not sure when this got fixed, or what fixed it, though.
