/sbin/sysctl -a from procps-3.3.9-11.5.1 dumps core with a SIGSEGV

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Environment

SUSE Linux Enterprise Server 12 Service Pack 2 (SLES 12 SP2)

Situation

After applying procps-3.3.9-11.5.1, executing /sbin/sysctl -a will dump core with a SIGSEGV when started by a regular user. Starting gdb on the core file will show the following stack trace:

# gdb /sbin/sysctl /tmp/core.sysctl.27708
GNU gdb (GDB; SUSE Linux Enterprise 12) 7.11.1
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Reading symbols from /sbin/sysctl...Reading symbols from /usr/lib/debug/sbin/sysctl.debug...done.
done.
[New LWP 27708]
Core was generated by `/sbin/sysctl -a'.
Program terminated with signal SIGSEGV, Segmentation fault.
(gdb) where
#0  __GI__IO_setvbuf (fp=fp@entry=0x0, 
    buf=0x7fce48e77010 "16384\n6\n712\t0\t0\t0\t0\t0\n\n cdrom.c 3.20 2003/12/17\n\ndrive name:\t\tsr0\ndrive speed:\t\t1\ndrive # of slots:\t1\nCan close tray:\t\t1\nCan open tray:\t\t1\nCan lock tray:\t\t1\nCan change speed:\t1\nCan select disk:\t0\nCan "..., mode=mode@entry=0, size=size@entry=131072) at iosetvbuf.c:42
#1  0x00000000004029ff in ReadSetting (name=name@entry=0x149547a "fs/protected_hardlinks") at sysctl.c:223
#2  0x0000000000402e7c in DisplayAll (path=path@entry=0x1495090 "/proc/sys/fs/") at sysctl.c:359
#3  0x0000000000402f1d in DisplayAll (path=0x403d11 <PROC_PATH> "/proc/sys/") at sysctl.c:356
#4  0x00007fce48a806e5 in __libc_start_main (main=0x4015a0 <main>, argc=2, argv=0x7fff82711878, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, 
    stack_end=0x7fff82711868) at libc-start.c:289
#5  0x0000000000401886 in _start () at ../sysdeps/x86_64/start.S:122

Resolution

This is a known issue and has been already reported to engineering who provided a fixed update.
The package containing the fix will be procps-3.3.9-11.8.1.

Cause

Disclaimer

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