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From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4b) Gecko/20030509 Description of problem: IA32 microcode update segfaults with kernel-2.4.20-1.1990. This used to work with pre-exec shield kernels (< -1.1976 I think) [139 kajtzu@d106 ~]% sudo strace /sbin/microcode_ctl -ui execve("/sbin/microcode_ctl", ["/sbin/microcode_ctl", "-ui"], [/* 43 vars */]) = 0 uname({sys="Linux", node="d106.fi.basen.net", ...}) = 0 brk(0) = 0x838b000 open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=94242, ...}) = 0 old_mmap(NULL, 94242, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40017000 close(3) = 0 open("/lib/tls/libc.so.6", 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`V\351\000"..., 512) = 512 fstat64(3, {st_mode=S_IFREG|0755, st_size=1537136, ...}) = 0 old_mmap(0xe80000, 1261352, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xe80000 old_mmap(0xfaf000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x12f000) = 0xfaf000 old_mmap(0xfb2000, 7976, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xfb2000 close(3) = 0 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4002f000 set_thread_area({entry_number:-1 -> 6, base_addr:0x4002f6c0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0 munmap(0x40017000, 94242) = 0 --- SIGSEGV (Segmentation fault) @ 0 (0) --- +++ killed by SIGSEGV +++ Version-Release number of selected component (if applicable): kernel-2.4.20-1.1990 How reproducible: Sometimes Steps to Reproduce: 1. run as root /sbin/microcode_ctl -ui 2. 3. Actual Results: Segfaults 80% of the time, otherwise it just fails miserably. Expected Results: Should not die on me. Additional info: [1 kajtzu@d106 ~]% rpm -q --qf '%{name} %{version} %{release} %{arch}\n' kernel kernel-utils glibc kernel 2.4.20 1.1990 i686 kernel-utils 2.4 8.28 i386 glibc 2.3.2 37 i686
Reproduceable with kernel-2.4.20-20.1.1995.2.1.nptl (i686) glibc-2.3.2-41 (i686) Could this be related to bug #91401?
Seems to work again with kernel-2.4.20-20.1.2002.nptl. Works for me.