Hi, preparing the Debian package for mdadm 2.6.3, I found a segfault in mdadm/Assemble.c:254, in the line:
} else if (tst->ss->load_super(tst,dfd, &super, NULL)) {
the problem is that tst->ss is NULL, due to reasons I have not yet
uncovered. The segfault happens only in the second iteration of the
for loop at line 212 and the load_super1 call, caused by the above
load_super in the first iteration, causes tst->ss to be set to NULL.
This happens in the first recursion (load_super1 calls itself), at
which point the
if (dsize < 24) {
check in super1.c:1033 fails and thus returns 1, which causes the
outer load_super1 function to return 1 after setting st->ss to NULL
in line super1.c:1013.
This all happens while the dfd variable in Assemble.c:254 has value
8, and assuming this is a file descriptor, then lsof says:
mdadm 25664 root 8r BLK 22,3 2806 /dev/hdc3
/dev/hdc3 is an extended partition on the disk.
/dev/hdc1 * 1 8 64228+ 83 Linux
/dev/hdc2 9 132 996030 82 Linux swap / Solaris
/dev/hdc3 133 30401 243135742+ 5 Extended
/dev/hdc5 133 256 995998+ 83 Linux
/dev/hdc6 257 505 2000061 83 Linux
/dev/hdc7 506 28347 223640833+ 83 Linux
/dev/hdc8 28348 30339 16000708+ 83 Linux
/dev/hdc9 30340 30401 497983+ 83 Linux
I am failing to reproduce this on v0.9 superblock systems.
Neil, could this be a bug?
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