# Segmentation fault when su

**URL:** <https://forums.suse.com/t/segmentation-fault-when-su/22798>\
**Category:** SLES Configure-Administer\
**Created:** [June 29, 2012, 9:45am UTC](https://forums.suse.com/t/segmentation-fault-when-su/22798 "2012-06-29T09:45:52Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dhananjaya\_amarakoon](https://avatars.discourse-cdn.com/v4/letter/d/278dde/32.png) [@dhananjaya\_amarakoon](https://forums.suse.com/u/dhananjaya_amarakoon)\
**Post date:** [June 29, 2012, 9:45am UTC](https://forums.suse.com/t/segmentation-fault-when-su/22798/1 "2012-06-29T09:45:52Z")

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Hi Friends,  
I am working on SUSE Linux Enterprise Server 11 SP1 for testing and I have getting Segmentation fault when do the su to the on specific user set.  
otcrel3@x4600-icap:/x03/otcrel3\>su - otc6  
Segmentation fault  
otcrel3@x4600-icap:/x03/otcrel3\>

============  
But this is working fine in users in /x04 mount point.  
I have getting following error message in /var/log/message.

Jun 29 12:10:11 x4600-icap kernel: [5836714.769438] su[26191]: segfault at 7fffa05a6924 ip 00007fd7db83b2b0 sp 00007fffa05a67f0 error 6 in pam\_unix2.so[7fd7db835000+b000]

Do you have any issue any idea regarding this issue,

Thanks  
Dhananjaya

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**Author:** ![enovaklbank](https://avatars.discourse-cdn.com/v4/letter/e/aca169/32.png) [@enovaklbank](https://forums.suse.com/u/enovaklbank)\
**Post date:** [June 29, 2012, 6:15pm UTC](https://forums.suse.com/t/segmentation-fault-when-su/22798/2 "2012-06-29T18:15:12Z")

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Hello my friend,

I think your filesystem is readonly and/or crashed. Would explain, why it’s working in another mountpoint.

Let’s do an “strace -p su - otc6” .

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**Author:** ![enovaklbank](https://avatars.discourse-cdn.com/v4/letter/e/aca169/32.png) [@enovaklbank](https://forums.suse.com/u/enovaklbank)\
**Post date:** [June 29, 2012, 6:25pm UTC](https://forums.suse.com/t/segmentation-fault-when-su/22798/3 "2012-06-29T18:25:12Z")

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Also, ls -l /etc/pam.d/

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**Author:** ![Jens-U](https://avatars.discourse-cdn.com/v4/letter/j/d78d45/32.png) [@Jens-U](https://forums.suse.com/u/Jens-U)\
**Post date:** [July 2, 2012, 4:54pm UTC](https://forums.suse.com/t/segmentation-fault-when-su/22798/4 "2012-07-02T16:54:42Z")

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Hi Dhananjaya,

does “ldd $(which su)” give any indication that shared libraries are load from /x03/…, rather than from /lib/… ?

Regards,  
Jens