Could not attach debugger

[Mahmood Naderan]

Hi
When I to attach a process to gdb in kdevelop I get this error

Could not attach debugger:
ptrace: Operation not permitted.

What should I do?

[Milian Wolff]

Post by Mahmood Naderan
Hi
When I to attach a process to gdb in kdevelop I get this error
ptrace: Operation not permitted.
What should I do?

Google for the error message and change the ptrace settings:

fromt the very first hit:

"And the solution is just either do this (as root):

$ echo 0 > /proc/sys/kernel/yama/ptrace_scope


or make it permanent by setting ptrace_scope to 0 in /etc/sysctl.d/10-
ptrace.conf"

see also:

https://wiki.ubuntu.com/SecurityTeam/Roadmap/KernelHardening#ptrace_Protection

[Mahmood Naderan]

ok thanks I thought it is a kdevelop specific message.
it is now fixed

[Chris Bruner]

$ echo 0> /proc/sys/kernel/yama/ptrace_scope
…or make it permanent by setting ptrace_scope to 0 in /etc/sysctl.d/10-
ptrace.conf"
https://wiki.ubuntu.com/SecurityTeam/Roadmap/KernelHardening#ptrace_Protection

Unfortunately my kernel doesn't know anything about yama. My solution
was to run it as root. It's a security fix so a debugger can't access
other owner's pids. Becomes a big pitb for anyone doing debugging.




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