Package: libc6 Version: 2.34-8 Severity: normal Dear Maintainer,
dave@atlas:~$ gdb Segmentation fault (core dumped) Gdb doesn't drop core if I revert glibc to 2.34-8. Sep 26 22:04:36 mx3210 kernel: do_page_fault() command='gdb' type=6 address=0x4bc63f0b in libresolv.so.2[ea7f2000+e000] Sep 26 22:04:36 mx3210 kernel: trap #6: Instruction TLB miss fault, vm_start = 0x0098b000, vm_end = 0x009c4000 Sep 26 22:04:36 mx3210 kernel: command line: gdb Sep 26 22:04:36 mx3210 kernel: CPU: 0 PID: 7976 Comm: gdb Not tainted 5.19.11+ #1 Sep 26 22:04:36 mx3210 kernel: Hardware name: 9000/800/rp3440 Sep 26 22:04:36 mx3210 kernel: Sep 26 22:04:36 mx3210 kernel: YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI Sep 26 22:04:36 mx3210 kernel: PSW: 00000000000001101111111100001111 Not tainted Sep 26 22:04:36 mx3210 kernel: r00-03 000000ff0006ff0f 000000000014a908 00000000006b5537 0000000000000154 Sep 26 22:04:36 mx3210 kernel: r04-07 00000000f2e59fd4 00000000f4e396c8 00000000009562d0 00000000f4e1176c Sep 26 22:04:36 mx3210 kernel: r08-11 00000000f4e117dc 0000000000000000 0000000000000000 00000000ffffffff Sep 26 22:04:36 mx3210 kernel: r12-15 0000000000000000 0000000000177730 0000000000000000 0000000000000000 Sep 26 22:04:36 mx3210 kernel: r16-19 0000000000000001 000000000013c41c 000000000016e870 000000004bc53f11 Sep 26 22:04:36 mx3210 kernel: r20-23 00000000009562d0 000000004bc63f09 000000000014add8 0000000000000000 Sep 26 22:04:36 mx3210 kernel: r24-27 00000000f4e117dc 00000000f4e1176c 0000000000000154 0000000000135108 Sep 26 22:04:36 mx3210 kernel: r28-31 0000000000000000 0000000000000001 00000000f98e24c0 0000000000011234 Sep 26 22:04:36 mx3210 kernel: sr00-03 0000000000957400 0000000000000000 0000000000000000 0000000000957400 Sep 26 22:04:36 mx3210 kernel: sr04-07 0000000000957400 0000000000957400 0000000000957400 0000000000957400 Sep 26 22:04:36 mx3210 kernel: Sep 26 22:04:36 mx3210 kernel: VZOUICununcqcqcqcqcqcrmunTDVZOUI Sep 26 22:04:36 mx3210 kernel: FPSR: 00000000000000000000000000000000 Sep 26 22:04:36 mx3210 kernel: FPER1: 00000000 Sep 26 22:04:36 mx3210 kernel: fr00-03 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Sep 26 22:04:36 mx3210 kernel: fr04-07 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Sep 26 22:04:36 mx3210 kernel: fr08-11 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Sep 26 22:04:36 mx3210 kernel: fr12-15 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Sep 26 22:04:36 mx3210 kernel: fr16-19 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Sep 26 22:04:36 mx3210 kernel: fr20-23 0000000000000000 0000000000000000 006b5500009562d0 0000000000000000 Sep 26 22:04:36 mx3210 kernel: fr24-27 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Sep 26 22:04:36 mx3210 kernel: fr28-31 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Sep 26 22:04:36 mx3210 kernel: Sep 26 22:04:36 mx3210 kernel: IASQ: 0000000000957400 0000000000957400 IAOQ: 000000004bc63f0b 000000004bc63f0f Sep 26 22:04:36 mx3210 kernel: IIR: 43ffff80 ISR: 0000000000957400 IOR: 000000000014add8 Sep 26 22:04:36 mx3210 kernel: CPU: 0 CR30: 00000040d6db4570 CR31: ffffffffffffefff Sep 26 22:04:36 mx3210 kernel: ORIG_R28: 0000000000000000 Sep 26 22:04:36 mx3210 kernel: IAOQ[0]: 000000004bc63f0b Sep 26 22:04:36 mx3210 kernel: IAOQ[1]: 000000004bc63f0f Sep 26 22:04:36 mx3210 kernel: RP(r2): 00000000006b5537 104c4: 43 ff ff 80 ldb 1fc0(sr3,r31),r31 dave@mx3210:~$ gdb -c core_gdb /usr/bin/gdb GNU gdb (Debian 12.1-3) 12.1 Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "hppa-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/bin/gdb... (No debugging symbols found in /usr/bin/gdb) [New LWP 8366] warning: File "/usr/lib/hppa-linux-gnu/libthread_db.so.1" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load:/lib/hppa-linux-gnu/libthread_db-1.0.so:/home/dave/debian/firefox/firefox-50.1.0/.gdbinit". To enable execution of this file add add-auto-load-safe-path /usr/lib/hppa-linux-gnu/libthread_db.so.1 line to your configuration file "/home/dave/.gdbinit". To completely disable this security protection add set auto-load safe-path / --Type <RET> for more, q to quit, c to continue without paging-- line to your configuration file "/home/dave/.gdbinit". For more information about this security protection see the "Auto-loading safe path" section in the GDB manual. E.g., run from the shell: info "(gdb)Auto-loading safe path" warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available. Core was generated by `gdb'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x4bc63f08 in ?? () (gdb) bt #0 0x4bc63f08 in ?? () #1 0x006b5534 in operator new(unsigned int) () #2 0xf2dcbc00 in boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::do_assign(char const*, char const*, unsigned int) () from /lib/hppa-linux-gnu/libboost_regex.so.1.74.0 #3 0xf4d7a434 in ?? () from /lib/hppa-linux-gnu/libsource-highlight.so.4 #4 0xf78bfe50 in ?? () from /lib/ld.so.1 Backtrace stopped: previous frame identical to this frame (corrupt stack?) (gdb) info shared >From To Syms Read Shared Object Library 0xf759e330 0xf75d6620 Yes (*) /lib/hppa-linux-gnu/libreadline.so.8 0xf7510160 0xf75233e8 Yes (*) /lib/hppa-linux-gnu/libz.so.1 0xf714f6a0 0xf717b7cc Yes (*) /lib/hppa-linux-gnu/libncursesw.so.6 0xf7117480 0xf712a86c Yes (*) /lib/hppa-linux-gnu/libtinfo.so.6 0xf70b9560 0xf70b99bc Yes /lib/hppa-linux-gnu/libdl.so.2 0xf69b56d0 0xf6c998bc Yes /lib/hppa-linux-gnu/libpython3.10.so.1.0 0xf68b98f0 0xf68b9d4c Yes /lib/hppa-linux-gnu/libpthread.so.0 0xf64c8ef8 0xf64fc374 Yes /lib/hppa-linux-gnu/libm.so.6 0xf6113f80 0xf6135674 Yes (*) /lib/hppa-linux-gnu/libexpat.so.1 0xf60bc544 0xf60d9e3c Yes (*) /lib/hppa-linux-gnu/liblzma.so.5 0xf5d4a5a0 0xf5d53e2c Yes (*) /lib/hppa-linux-gnu/libbabeltrace.so.1 0xf59f1870 0xf5a2f60c Yes (*) /lib/hppa-linux-gnu/libbabeltrace-ctf.so.1 0xf5596cf0 0xf55f98dc Yes (*) /lib/hppa-linux-gnu/libmpfr.so.6 0xf5195d90 0xf51f78ec Yes (*) /lib/hppa-linux-gnu/libgmp.so.10 0xf4d7624c 0xf4e0ed98 Yes (*) /lib/hppa-linux-gnu/libsource-highlight.so.4 0xf4b7b630 0xf4b92c3c Yes (*) /lib/hppa-linux-gnu/libxxhash.so.0 0xf4825a6c 0xf482945c Yes (*) /lib/hppa-linux-gnu/libdebuginfod.so.1 0xf447faf0 0xf45cc900 Yes (*) /lib/hppa-linux-gnu/libstdc++.so.6 0xf3ff3fb0 0xf4003b70 Yes (*) /lib/hppa-linux-gnu/libgcc_s.so.4 0xf3ce33f0 0xf3e3890c Yes /lib/hppa-linux-gnu/libc.so.6 0xf78bfe70 0xf78e51fc Yes /lib/ld.so.1 0xf3933ee0 0xf39eac40 Yes /lib/hppa-linux-gnu/libglib-2.0.so.0 0xf3838f70 0xf38b124c Yes (*) /lib/hppa-linux-gnu/libdw.so.1 0xf3426f80 0xf343fe60 Yes (*) /lib/hppa-linux-gnu/libelf.so.1 0xf310d2a0 0xf31135a0 Yes (*) /lib/hppa-linux-gnu/libuuid.so.1 0xf2d5e610 0xf2e36960 Yes (*) /lib/hppa-linux-gnu/libboost_regex.so.1.74.0 0xf2a8f010 0xf2b10a40 Yes (*) /lib/hppa-linux-gnu/libcurl-gnutls.so.4 0xf28bada0 0xf28f65ac Yes (*) /lib/hppa-linux-gnu/libpcre2-8.so.0 0xf2510210 0xf251e1d0 Yes (*) /lib/hppa-linux-gnu/libbz2.so.1.0 0xf1e7ddf0 0xf2082984 Yes (*) /lib/hppa-linux-gnu/libicui18n.so.71 0xf1851540 0xf1970414 Yes (*) /lib/hppa-linux-gnu/libicuuc.so.71 0xf1551060 0xf156d1f4 Yes (*) /lib/hppa-linux-gnu/libnghttp2.so.14 0xf118f9f0 0xf1198490 Yes (*) /lib/hppa-linux-gnu/libidn2.so.0 0xf0e820b0 0xf0e94cac Yes (*) /lib/hppa-linux-gnu/librtmp.so.1 0xf0a843e0 0xf0ab5efc Yes (*) /lib/hppa-linux-gnu/libssh2.so.1 0xf067ded8 0xf068030c Yes (*) /lib/hppa-linux-gnu/libpsl.so.5 0xf0599420 0xf05cbc60 Yes (*) /lib/hppa-linux-gnu/libnettle.so.8 0xf01c5c40 0xf0305264 Yes (*) /lib/hppa-linux-gnu/libgnutls.so.30 0xefffd138 0xf0038cf8 Yes (*) /lib/hppa-linux-gnu/libgssapi_krb5.so.2 0xefd9ea50 0xefde25d0 Yes (*) /lib/hppa-linux-gnu/libldap-2.5.so.0 0xef990f70 0xef999274 Yes (*) /lib/hppa-linux-gnu/liblber-2.5.so.0 0xef4beef0 0xef589948 Yes (*) /lib/hppa-linux-gnu/libzstd.so.1 0xef237b2c 0xef23fe14 Yes (*) /lib/hppa-linux-gnu/libbrotlidec.so.1 0xed3f23b8 0xed3f2810 Yes (*) /lib/hppa-linux-gnu/libicudata.so.71 0xed19cac4 0xed1d3dd0 Yes (*) /lib/hppa-linux-gnu/libunistring.so.2 0xecd94920 0xecdacdf0 Yes (*) /lib/hppa-linux-gnu/libhogweed.so.6 0xec9613e0 0xecc23198 Yes (*) /lib/hppa-linux-gnu/libcrypto.so.3 0xec5c46e0 0xec6afa34 Yes (*) /lib/hppa-linux-gnu/libp11-kit.so.0 0xec1903a0 0xec19e6cc Yes (*) /lib/hppa-linux-gnu/libtasn1.so.6 0xec00dfb0 0xec07e0dc Yes (*) /lib/hppa-linux-gnu/libkrb5.so.3 0xebbf5330 0xebc1436c Yes (*) /lib/hppa-linux-gnu/libk5crypto.so.3 0xeb7f2f28 0xeb7f4268 Yes (*) /lib/hppa-linux-gnu/libcom_err.so.2 0xeb3f4de0 0xeb3fda4c Yes (*) /lib/hppa-linux-gnu/libkrb5support.so.0 0xeaff59d8 0xeb009bc0 Yes (*) /lib/hppa-linux-gnu/libsasl2.so.2 0xeae7c60c 0xeae7cf6c Yes (*) /lib/hppa-linux-gnu/libbrotlicommon.so.1 0xead10420 0xead169e0 Yes /lib/hppa-linux-gnu/libffi.so.8 0xeabf34cc 0xeabf50a0 Yes (*) /lib/hppa-linux-gnu/libkeyutils.so.1 0xea7f47d0 0xea7fdf9c Yes /lib/hppa-linux-gnu/libresolv.so.2 (*): Shared library is missing debugging information. (gdb) disass 0x6b5534-16,0x6b5534+16 Dump of assembler code from 0x6b5524 to 0x6b5544: 0x006b5524 <_Znwj+36>: stw r5,-70(sp) 0x006b5528 <_Znwj+40>: stw r4,-6c(sp) 0x006b552c <_Znwj+44>: b,l 0x6bbc00,rp 0x006b5530 <_Znwj+48>: copy r3,r26 0x006b5534 <_Znwj+52>: movb,= ret0,r5,0x6b5558 <_Znwj+88> 0x006b5538 <_Znwj+56>: copy r6,r19 0x006b553c <_Znwj+60>: ldw -94(sp),rp 0x006b5540 <_Znwj+64>: ldw -74(sp),r6 End of assembler dump. (gdb) disass 0x6bbc00-16,0x6bbc00+20 Dump of assembler code from 0x6bbbf0 to 0x6bbc14: 0x006bbbf0: ldo 5c8(r1),r22 0x006bbbf4: ldw 0(r22),r21 0x006bbbf8: bv r0(r21) 0x006bbbfc: ldw 4(r22),r19 0x006bbc00: addil L%15800,dp,r1 0x006bbc04: ldo 4d0(r1),r22 0x006bbc08: ldw 0(r22),r21 0x006bbc0c: bv r0(r21) 0x006bbc10: ldw 4(r22),r19 End of assembler dump. (gdb) x/2x 0x14add8 0x14add8: 0x4bc63f09 0x4bc53f11 The backtrace is not complete because the above debugging was done with glibc 2.34-8 and the crash occurs with 2.35-1. >From what I can tell, the PLT is corrupt. The target and PIC registers loaded in the long branch stub between 0x006bbc00 and 0x006bbc10 appear to incorrect. As a result, the code branches to an unmapped location. So far, this problem seems specific to GNU gdb (Debian 12.1-3) 12.1. dave@mx3210:~/gnu/gdb/objdir/gdb$ ls -l /usr/bin/gdb -rwxr-xr-x 1 root root 9940508 Jul 7 17:12 /usr/bin/gdb An old private build of gdb still seems to work. I have not seen this issue with any other applications. Regards, Dave Anglin -- System Information: Debian Release: bookworm/sid APT prefers buildd-unstable APT policy: (500, 'buildd-unstable'), (500, 'unstable') Architecture: hppa (parisc64) Kernel: Linux 5.19.11+ (SMP w/4 CPU threads) Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) Versions of packages libc6 depends on: ii libgcc-s4 12.2.0-3 Versions of packages libc6 recommends: ii libidn2-0 2.3.3-1+b1 Versions of packages libc6 suggests: ii debconf [debconf-2.0] 1.5.79 ii glibc-doc 2.34-8 ii libc-l10n 2.34-8 ii libnss-nis 3.1-4 ii libnss-nisplus 1.3-4 ii locales 2.34-8 -- debconf information: * glibc/restart-services: spamassassin ssh samba postfix openbsd-inetd cron atd glibc/restart-failed: glibc/kernel-too-old: * glibc/upgrade: true glibc/disable-screensaver: glibc/kernel-not-supported: * libraries/restart-without-asking: true