Red Hat Bugzilla – Bug 509552
patch[4601]: segfault at 0 ip 00000031d767ee70 sp 00007fff68ea9ba8 error 4 in libc-2.10.1.so[31d7600000+164000]
Last modified: 2009-07-03 09:49:54 EDT
Description of problem: patch[4601]: segfault at 0 ip 00000031d767ee70 sp 00007fff68ea9ba8 error 4 in libc-2.10.1.so[31d7600000+164000] while trying to patch kernel 2.6.30 to 2.6.30.1. Version-Release number of selected component (if applicable): glibc-2.10.1-2.x86_64 How reproducible: Patch kernel 2.6.30 to 2.6.30.1 Steps to Reproduce: 1. wget -c http://kernel.org/pub/linux/kernel/v2.6/patch-2.6.30.1.bz2 2. bzip2 -d patch-2.6.30.1.bz2 3. patch -p1 < patch-2.6.30.1 Actual results: segfault Expected results: patched kernel Additional info: [root@surfplank2 linux]# gdb patch GNU gdb (GDB) Fedora (6.8.50.20090302-32.fc11) Copyright (C) 2009 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 "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Missing separate debuginfos, use: debuginfo-install patch-2.5.4-38.fc11.x86_64 (gdb) run -p1 < ../patch-2.6.30.1 Starting program: /usr/bin/patch -p1 < ../patch-2.6.30.1 patching file Documentation/sysctl/vm.txt patching file Makefile patching file arch/arm/include/asm/cacheflush.h patching file arch/x86/crypto/aesni-intel_asm.S Program received signal SIGSEGV, Segmentation fault. strcmp () at ../sysdeps/x86_64/strcmp.S:29 29 L(oop): movb (%rdi), %al Current language: auto; currently asm (gdb) bt #0 strcmp () at ../sysdeps/x86_64/strcmp.S:29 #1 0x0000000000408233 in ?? () #2 0x00000031d761ea2d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffffffe5f8) at libc-start.c:220 #3 0x0000000000401db9 in fflush () at iofflush.c:36 #4 0x00007fffffffe5f8 in ?? () #5 0x000000000000001c in ?? () #6 0x0000000000000002 in ?? () #7 0x00007fffffffe86f in ?? () #8 0x00007fffffffe87e in ?? () #9 0x0000000000000000 in ?? () (gdb) Maybe also see https://bugzilla.redhat.com/show_bug.cgi?id=505564 ? After a reboot problem remains.
Thus patch is calling strcmp with a NULL argument. (gdb) i line *0x0000000000408233 Line 420 of "patch.c" starts at address 0x40821c <main+6332> and ends at 0x40823b <main+6363>. (gdb) l patch.c:420 415 pfatal ("Can't set permissions on file %s", 416 quotearg (outname)); 417 if (! inerrno && incontext) { 418 security_context_t outcontext; 419 getfilecon (outname, &outcontext); 420 if (strcmp(outcontext, incontext) && 421 setfilecon (outname, incontext) != 0) { 422 if (errno != ENOTSUP && errno != EPERM) 423 pfatal ("Can't set security context on file %s", 424 quotearg (outname));
*** This bug has been marked as a duplicate of bug 498102 ***