We're having a problem with libguestfs's daemon crashing during v2v. The
crash is in libaugeas. We unfortunately don't have a small reproducer,
but we have finally managed to get a core dump. The stack trace looks
like this:
#0 0x00007fb490f3763b in pathx_symtab_remove_descendants (
symtab=<value optimized out>, tree=0x5941900) at pathx.c:2569
#1 0x00007fb490f3580b in tree_rm (p=0x8177da0) at augeas.c:890
#2 0x00007fb490f363e5 in aug_rm (aug=0x57b5e20, path=<value optimized out>)
at augeas.c:911
#3 0x00007fb490f36b08 in aug_save (aug=0x57b5e20) at augeas.c:1192
#4 0x0000000000403992 in do_aug_save () at augeas.c:332
#5 0x000000000042194f in aug_save_stub (xdr_in=<value optimized out>)
at stubs.c:623
Interesting local variables:
(gdb) print t
$4 = (struct tree *) 0xc1
(gdb) print *tree
$5 = {next = 0x0, parent = 0x66a5130, label = 0x64f55a0 "saved",
children = 0x0, value = 0x6a32290 "/files/boot/grub/menu.lst", dirty = 0}
This is augeas-libs-0.7.2-3.fc13.x86_64.
There are many circumstances in which this conversion works. For
example, if I run the conversion again against the partially converted
guest it will succeed. This leads me to believe that the problem is
unlikely to be local to the crash.
Any ideas? I can provide the crashed daemon and core dump for inspection
if required. I'm also more than happy to test augeas patches.
Thanks,
Matt
--
Matthew Booth, RHCA, RHCSS
Red Hat Engineering, Virtualisation Team
GPG ID: D33C3490
GPG FPR: 3733 612D 2D05 5458 8A8A 1600 3441 EA19 D33C 3490
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