Re: [BLUG] Fwd: possible causes of segfaults

Your ld's got segment fault inside the shared library libc-2.9.so which,
in generally, is a relatively bug-free piece of software as it's so
important that essentially every single piece of program will call it.
It should have been loaded and resides in the memory and just that 7
invocation of ld's (since the PIDs are different) segfault'ed at
different points in libc makes me wonder if somehow the memory is at
fault. So it might not be a bad idea to run a memory test program (such
as memtest86+) to check your memory. Have a good holiday! --Shing-Shong

> Hiya,
>
> I just installed a new file / computation server at my work, and a few
> days into its tenure, I've started noticing some segfaults.
>
> For instance, I was running a bunch of image processing jobs, and
> ImageMagick's "convert" program segfaulted. I ran it again on the
> same data, and it did fine. So I'm wondering if I have bad hardware,
> or bad libraries, or what?
>
> Possible causes of segmentation faults that I know of:
> Hardware --- could be very random and difficult to find, might need to
> totally shut down the server and run a memory tester for days in order
> to find.
>
> Filesystem corruption --- should be reproducible, right? if "convert"
> segfaults once, it should do it again...
>
> Libraries / os problems --- should be reproducible too, right?
>
>
>
> from dmesg:
> [17217.872070] ld[16027]: segfault at 0 ip 00002ae3b445411b sp
> 00007fffc39a74e8 error 4 in libc-2.9.so[2ae3b43d0000+168000]
> [17354.753195] ld[20115]: segfault at 0 ip 00002b832843d11b sp
> 00007fff729f2fa8 error 4 in libc-2.9.so[2b83283b9000+168000]
> [19463.265457] ld[3673]: segfault at 0 ip 00002ad2f7a3a11b sp
> 00007fffd11023a8 error 4 in libc-2.9.so[2ad2f79b6000+168000]
> [19474.653491] ld[3680]: segfault at 0 ip 00002b7f10f0e11b sp
> 00007fffbac8a978 error 4 in libc-2.9.so[2b7f10e8a000+168000]
> [19507.935271] ld[3687]: segfault at 0 ip 00002af5c9eb511b sp
> 00007fff12fe00d8 error 4 in libc-2.9.so[2af5c9e31000+168000]
> [19528.740436] ld[3701]: segfault at 0 ip 00002b265616a11b sp
> 00007fff2ceb8d98 error 4 in libc-2.9.so[2b26560e6000+168000]
> [19606.865585] ld[3754]: segfault at 0 ip 00002ae3a079811b sp
> 00007fff6bc4d3c8 error 4 in libc-2.9.so[2ae3a0714000+168000]
> [263529.064795] convert[24941]: segfault at 7fffd973b6b8 ip
> 00007fffdb1e2ed9 sp 00007fffd973b660 error 7 in
> libMagickCore.so.1.0.0[7fffdb0fe000+1b5000]
> [268495.776398] convert[28595]: segfault at 7fffc7e2b608 ip
> 00007fffc9e13ed9 sp 00007fffc7e2b5b0 error 7 in
> libMagickCore.so.1.0.0[7fffc9d2f000+1b5000]
>
>
>
> Any advice?
> Thanks,
> -Thomas
>
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