kgdb crashes when remote debugging requested
kgdb crashes when remote debugging (-r) is requested. The crash involves
a NULL pointer dereference in libkvm.
I've found that the crash was introduced with revision 1.2 of
In that revision the global variable 'kvm' isn't initialised if remote
debugging is requested, however it is always used. The value of 'kvm' is
passed to a libkvm function which attempts to dereference it.
Updated by alexh over 3 years ago
Simon, is there any update on this? Did you have a chance of looking into this?
Updated by tuxillo almost 3 years ago
I've started a qemu booting w/ our latest i386 ISO.
# qemu -m 128 -hda root.img -cdrom dfly.iso -boot d -s
Using /boot/kernel from the ISO image, I've done:
# kgdb -r localhost:1234 /tmp/kernel
I don't get any segfault. So can you please give some instructions on how to
reproduce this crash?
Or maybe it is gone after the gdb update that took place after this bug was opened?
Updated by corecode almost 3 years ago
Quite possible that the bug is gone. If -r works, then all is fine.