Bug 242612
| Summary: | glibc "Segmentation Fault" issues after update to f7-ga | ||||||
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| Product: | [Fedora] Fedora | Reporter: | Steve Ebersole <steve.ebersole> | ||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> | ||||
| Severity: | low | Docs Contact: | |||||
| Priority: | low | ||||||
| Version: | 7 | CC: | jakub, sangu.fedora, selinux | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | i386 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2007-08-29 18:34:38 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Description
Steve Ebersole
2007-06-05 03:01:48 UTC
When you see SIGSEGV in gdb, in addition to bt please issue also info regs and in a different shell run cat /proc/`pidof java`/maps Also, running the program under strace instead of gdb and attaching strace output would be helpful. (gdb) info reqs Undefined info command: "reqs". Try "help info". (gdb) info regs Undefined info command: "regs". Try "help info". (gdb) regs Undefined command: "regs". Try "help". (gdb) info "info" must be followed by the name of an info command. List of info subcommands: info address -- Describe where symbol SYM is stored info all-registers -- List of all registers and their contents info args -- Argument variables of current stack frame info auxv -- Display the inferior's auxiliary vector info breakpoints -- Status of user-settable breakpoints info catch -- Exceptions that can be caught in the current stack frame info checkpoints -- IDs of currently known forks/checkpoints info classes -- All Objective-C classes info common -- Print out the values contained in a Fortran COMMON block info copying -- Conditions for redistributing copies of GDB info dcache -- Print information on the dcache performance info display -- Expressions to display when program stops info extensions -- All filename extensions associated with a source language info files -- Names of targets and files being debugged info float -- Print the status of the floating point unit info forks -- IDs of currently known forks/checkpoints info frame -- All about selected stack frame info functions -- All function names info handle -- What debugger does when program gets various signals info line -- Core addresses of the code for a source line info linkmap -- Display the inferior's linkmap ---Type <return> to continue, or q <return> to quit--- Are you sure it should be `info regs`? [steve@localhost ~]$ cat /proc/`pidof java`/maps bash: pidof: command not found cat: /proc//maps: No such file or directory Created attachment 156202 [details]
requested strace output
Attaching the output of strace. As I mentioned I am a Linux/Fedora noob, so I
"believe" I got the command right. The command I ran is:
strace -o /home/steve/Desktop/strace.txt /usr/java/jdk1.5.0_11/bin/java -Xms64m
-Xmx256m -XX:MaxPermSize=99m -ea -Xbootclasspath/p:../lib/boot.jar
com.intellij.idea.Main
Sorry, typo, info reg Use /sbin/pidof if you don't have /sbin in your PATH. Anyway, from strace the following looks wrong mmap2(0x4d540000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13) = 0x110000 With MAP_FIXED, kernel must honor the address or the syscall must fail, but in this case succeeded with a different address. That would be a kernel bug. What kernel are you using? Whatever "system update" told me to use ;) Actually I just got a new update last night as well with no improvement. As for the specific version, how do I tell? uname -a [steve@localhost ~]$ uname -a Linux localhost.localdomain 2.6.21-1.3200.fc8 #1 SMP Sat Jun 2 05:42:16 EDT 2007 i686 i686 i386 GNU/Linux ok, I think I see what's wrong with the MAP_FIXED code. I've got a patch, I just want Ingo to take a look at it before I commit it, as it touches execshield. *** Bug 242749 has been marked as a duplicate of this bug. *** Can you try the 3218 kernel from http://people.redhat.com/davej/kernels/Fedora/fc7 That should have fixed MAP_FIXED behaviour. Works for me:
execve("/usr/bin/vmware-ping", ["vmware-ping", "-q", "192.168.1.1"], [/* 20 vars
*/]) = 0
brk(0) = 0x9a79000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=78336, ...}) = 0
mmap2(NULL, 78336, PROT_READ, MAP_PRIVATE, 3, 0) = 0x111000
close(3) = 0
open("/lib/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\320\20"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1673760, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x125000
mmap2(0x45efb000, 1390032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0)
= 0x45efb000
mmap2(0x46049000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14e) = 0x46049000
mmap2(0x4604c000, 9680, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4604c000
close(3) = 0
Fails with 2.6.21-1.3209.fc8PAE
Works in 2.6.21-1.3213.fc8PAE too. |