program execution is stopped with SIGBUS on FreeBSD

[niekgg]

Environment

> date
Sun May  5 21:14:01 +04 2024

> r2 -v
radare2 5.9.1 32110 @ freebsd-x86-64
birth: git.5.9.0-139-g5225ba580a 2024-05-03__15:31:16
commit: 5225ba580a1460928b61d83c70795e9e4311f67a
options: gpl -O? cs:5 cl:2 make

> uname -ms
FreeBSD amd64

Description

When debugging a simple program I receive a SIGBUS when I continue execution after a breakpoint on FreeBSD amd64 platform.

I have sysctl setting to give unprivileged process debugging capability

> sysctl -a security.bsd.unprivileged_proc_debug
security.bsd.unprivileged_proc_debug: 1

Test

> r2 -d  bin/simple_malloc/5.3.0/simple_malloc
WARN: Relocs has not been applied. Please use `-e bin.relocs.apply=true` or `-e bin.cache=true` next time
 -- Move between your search hits in visual mode using the 'n' and 'N' keys
[0x199fc8789b70]> db main
[0x199fc8789b70]> dc
[0x00201821]> s
0x201821
[0x00201821]> dc
INFO: Child stopped with signal 10
[+] signal 10 aka SIGBUS received 0 (Bus Error)