[Bug 1386637] Re: multipath shows non-mpath disks as being multipath

[Mauricio Faria de Oliveira]

Hi @mathieu-tl,

Marking as verification-failed since the version from -proposed hits a segfault in 'multipath -l'.
Here are some details/stack trace:

It segfaults:

	# multipath -l
	Segmentation fault

Trusty / 14.04.3:

	# lsb_release -d
	Description:	Ubuntu 14.04.3 LTS

	# uname -a
	Linux plzp17 3.19.0-29-generic #31~14.04.1-Ubuntu SMP Thu Sep 10 09:45:11 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux

Using multipath-tools from trusty-proposed (0.4.9-3ubuntu7.5)

	# apt-cache policy multipath-tools
	multipath-tools:
	  Installed: 0.4.9-3ubuntu7.5
	  Candidate: 0.4.9-3ubuntu7.5
	  Version table:
	 *** 0.4.9-3ubuntu7.5 0
		500 http://ports.ubuntu.com/ubuntu-ports/ trusty-proposed/main ppc64el Packages
		100 /var/lib/dpkg/status
	     0.4.9-3ubuntu7.4 0
		500 http://ports.ubuntu.com/ubuntu-ports/ trusty-updates/main ppc64el Packages
	     0.4.9-3ubuntu7 0
		500 http://ports.ubuntu.com/ubuntu-ports/ trusty/main ppc64el Packages

	# dpkg -l | grep 'multipath\|kpartx'
	ii  kpartx                              0.4.9-3ubuntu7.5                 ppc64el      create device mappings for partitions
	ii  kpartx-boot                         0.4.9-3ubuntu7.5                 all          Provides kpartx during boot
	ii  multipath-tools                     0.4.9-3ubuntu7.5                 ppc64el      maintain multipath block device access
	ii  multipath-tools-boot                0.4.9-3ubuntu7.5                 all          Support booting from multipath devices


Problem contained in libmultipath, not any external library/component, in the initialization phase:

	# gdb multipath
	GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
	...
	(gdb) run -l
	Starting program: /sbin/multipath -l
	...
	Program received signal SIGSEGV, Segmentation fault.
	0x00003fffb7e3fd70 in vector_alloc_slot () from /lib/libmultipath.so.0
	(gdb) bt
	#0  0x00003fffb7e3fd70 in vector_alloc_slot () from /lib/libmultipath.so.0
	#1  0x00003fffb7e3e200 in keyword_alloc () from /lib/libmultipath.so.0
	#2  0x00003fffb7e3e2c4 in install_keyword_root () from /lib/libmultipath.so.0
	#3  0x00003fffb7e5ac34 in init_keywords () from /lib/libmultipath.so.0
	#4  0x00003fffb7e4a54c in load_config () from /lib/libmultipath.so.0
	#5  0x0000000010002bcc in ?? ()
	#6  0x00003fffb7c94d00 in generic_start_main (main=0x10002b10, argc=<optimized out>, 
	    argv=0x3ffffffffa28, auxvec=0x3ffffffffb30, init=<optimized out>, rtld_fini=<optimized out>, 
	    stack_end=<optimized out>, fini=<optimized out>) at ../csu/libc-start.c:287
	#7  0x00003fffb7c94ef8 in __libc_start_main (argc=<optimized out>, argv=<optimized out>, 
	    ev=<optimized out>, auxvec=<optimized out>, rtld_fini=<optimized out>, stinfo=<optimized out>, 
	    stack_on_entry=<optimized out>) at ../sysdeps/unix/sysv/linux/powerpc/libc-start.c:93
	#8  0x0000000000000000 in ?? ()
	(gdb)

Downgrading to version in trusty-updates (0.4.9-3ubuntu7.4):

	# apt-get install {multipath-tools,kpartx}{,-boot}=0.4.9-3ubuntu7.4
	...
	The following packages will be DOWNGRADED:
	  kpartx kpartx-boot multipath-tools multipath-tools-boot
	...
	Get:1 http://ports.ubuntu.com/ubuntu-ports/ trusty-updates/main multipath-tools-boot all 0.4.9-3ubuntu7.4 [6,070 B]
	Get:2 http://ports.ubuntu.com/ubuntu-ports/ trusty-updates/main multipath-tools ppc64el 0.4.9-3ubuntu7.4 [108 kB]
	Get:3 http://ports.ubuntu.com/ubuntu-ports/ trusty-updates/main kpartx-boot all 0.4.9-3ubuntu7.4 [2,116 B]
	Get:4 http://ports.ubuntu.com/ubuntu-ports/ trusty-updates/main kpartx ppc64el 0.4.9-3ubuntu7.4 [19.0 kB]
	...

Now it works fine:

	# multipath -l
	36005076303ffd2a40000000000000345 dm-2 AIX,VDASD
	size=50G features='1 queue_if_no_path' hwhandler='0' wp=rw
	`-+- policy='round-robin 0' prio=-1 status=active
	  |- 0:0:4:0 sdd 8:48  active undef running
	  `- 1:0:4:0 sdh 8:112 active undef running
	36005076303ffd2a40000000000000344 dm-1 AIX,VDASD
	size=50G features='1 queue_if_no_path' hwhandler='0' wp=rw
	`-+- policy='round-robin 0' prio=-1 status=active
	  |- 0:0:3:0 sdc 8:32  active undef running
	  `- 1:0:3:0 sdg 8:96  active undef running
	36005076303ffd2a40000000000000343 dm-0 AIX,VDASD
	size=50G features='1 queue_if_no_path' hwhandler='0' wp=rw
	`-+- policy='round-robin 0' prio=-1 status=active
	  |- 0:0:2:0 sdb 8:16  active undef running
	  `- 1:0:2:0 sdf 8:80  active undef running

	# echo $?
	0


** Tags removed: verification-needed
** Tags added: verification-failed

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https://bugs.launchpad.net/bugs/1386637

Title:
  multipath shows non-mpath disks as being multipath

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