[Bug 4550] Segfault in Busybox while installing Ubuntu 11.10

bugzilla at busybox.net bugzilla at busybox.net
Thu Feb 23 01:48:35 UTC 2012


https://bugs.busybox.net/show_bug.cgi?id=4550

--- Comment #28 from Denys Vlasenko <vda.linux at googlemail.com> 2012-02-23 01:48:35 UTC ---
Franz, if you are using modified busybox per comment 22 (where init.c has
handle_sigsegv() function), then I don't understand why you don't see the
_result_ of that function triggering.

The messages you show:

segfault at NNNNNN ip NNNNNNN sp NNNNNNNN error N

should not appear - the handle_sigsegv() should print its stuff instead, and
then loop forever, sleeping. Something is seriously wrong...
The functions you are disassembling in few last comments appear random...
another bad sign.

Can you start by verifying that you can trigger handle_sigsegv() by sending a
SEGV to init by hand:

kill -SEGV 1

should do it.

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