Python Exception <class 'RuntimeError'>: No session started

[bb33bb]

GEF+GDB version

all the same version to issue 1102

Describe the issue you encountered

Do you read the docs and look at previously closed issues/PRs for similar cases?

No

Architecture impacted

• ARM64

Describe your issue. Without a proper reproduction step-by-step, your issue will be ignored.

echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope

Provide a step-by-step to reproduce your issue.

start qemu
gdb-multiarch
-ex "set confirm off"
-ex "set print pretty on"
-ex "target remote localhost:1234"
-ex "set auto-load safe-path /"

Minimalist test case

Additional context?

• Screenshots
• Callstack
• Coredumps
• If possible and useful, please upload the binary

[bb33bb]

if u can not reproduce, plz wait for my several trys.

I will update it .

[hugsy]

Yes, I cannot reproduce. Provide a more detailed step by step

Also

-ex "target remote localhost:1234"

Use gef-remote, see the docs

[bb33bb]

as u told me ,i use gef-remote

Env:

uname -a  
Linux singapore 6.9.0-1-MANJARO #1 SMP PREEMPT_DYNAMIC Mon May 13 07:01:28 UTC 2024 x86_64 GNU/Linux

gdb command:

echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
gdb-multiarch \
-ex "set confirm off" \
-ex "set print pretty on" \
-ex "gef-remote localhost 1234" \
-ex "set auto-load safe-path /" \
-ex "file /run/media/xxxxx/9e4b17d7-a9ed-4cee-90f7-e8b4e511c8c1/u22docker/kernel5.10/common/vmlinux"

0

GNU gdb (GDB) 14.2
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For bug reporting instructions, please see:
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    <http:https://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word".
GEF for linux ready, type `gef' to start, `gef config' to configure
88 commands loaded and 5 functions added for GDB 14.2 in 0.00ms using Python engine 3.12
warning: No executable has been specified and target does not support
determining executable automatically.  Try using the "file" command.
0xffff800008e0ab6c in ?? ()
[!] Command 'gef-remote' failed to execute properly, reason: No session started
Reading symbols from /run/media/......

I am debuging qemu which is runing arm64 kernel
this time it is different from the last time's output
but as u can see, there maybe some thing not very ok.
any work if needed to reproduce, i will try my best
if this issue designed just as it is in the above, plz ignore it.

if i use

if i use target remote localhost:1234
[!] Command 'context' failed to execute properly, reason: 
Python Exception <class 'RuntimeError'>: No session started
Error while executing Python code.
Reading symbols from /run/media/avboy/9e4b17d7-a9ed-4cee-90f7-e8b4e511c8c1/u22docker/kernel5.10/common/vmlinux...
(remote) gef➤  

[hugsy]

I still cannot reproduce. I just re-tested it following the docs and it works as expected.

[bb33bb]

I still cannot reproduce. I just re-tested it following the docs and it works as expected.

I close it now , and if find time to reproduce it. I will reopen, Thanks !!