Bug#645563: mdadm: segmentation fault when converting raid10 to raid0

[Daniel Kahn Gillmor]

On 10/16/2011 08:46 PM, Daniel Kahn Gillmor wrote:
> mdadm /dev/md0 --grow --level 0
> 
> 
> I'm attaching an strace of the final command, which is what gives the
> segmentation fault. 

and, after rebuilding mdadm with debug symbols, i gathered this
backtrace from the same command under gdb:

(gdb) run /dev/md0 --grow --level 0
Starting program: /sbin/mdadm /dev/md0 --grow --level 0

Program received signal SIGSEGV, Segmentation fault.
connect_monitor (devname=0x0) at msg.c:469
469	}
(gdb) bt
#0  connect_monitor (devname=0x0) at msg.c:469
#1  0x1004fff0 in ping_monitor (devname=<optimized out>) at msg.c:209
#2  0x10022e2c in Grow_reshape (devname=0xffffee41 "/dev/md0", fd=7,
quiet=0,
    backup_file=0x0, size=101888, level=0, layout_str=0x0, chunksize=0,
    raid_disks=0, devlist=0x0, assume_clean=0, force=0) at Grow.c:1556
#3  0x10005ce8 in main (argc=5, argv=0xffffece4) at mdadm.c:1638
(gdb)

hth,

	--dkg

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