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#1 2024-09-25 14:37:33
- dtexetd
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GDB - Input/Output Error Code 126
The file I'm trying to debug has a input/ouput error
The file and its dependencies have exec. permissions
output:
(gdb) r
Starting program: /home/dtexetd/Desktop/test/h/demo
/usr/bin/bash: line 1: /home/dtexetd/Desktop/test/h/demo: Input/output error
/usr/bin/bash: line 1: /home/dtexetd/Desktop/test/h/demo: Success
During startup program exited with code 126.
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#2 2024-09-25 14:44:49
- gromit
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Re: GDB - Input/Output Error Code 126
Can you launch the executable without gdb? also whats the output of "file /home/dtexetd/Desktop/test/h/demo"?
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#3 2024-09-25 15:01:38
- dtexetd
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Re: GDB - Input/Output Error Code 126
Can you launch the executable without gdb? also whats the output of "file /home/dtexetd/Desktop/test/h/demo"?
./demo
bash: ./demo: Input/output errorfile demo
demo: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter ../.glibc/glibc_2.28_no-tcache/ld.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=767e8320822fef96ebaeab4221088b81907ce17c, with debug_info, not strippedOffline
#4 2024-09-25 15:14:48
- gromit
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Re: GDB - Input/Output Error Code 126
How did you build this executable?
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#5 2024-09-25 15:19:04
- seth
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Re: GDB - Input/Output Error Code 126
126 is ENOKEY 
What exactly is "demo"?
And what process do you pass to gdb to get bash outputs?
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#6 2024-09-25 19:25:58
- dtexetd
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Re: GDB - Input/Output Error Code 126
How did you build this executable?
I didn't create the binary
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#7 2024-09-25 19:29:04
- dtexetd
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Re: GDB - Input/Output Error Code 126
126 is ENOKEY
What exactly is "demo"?
And what process do you pass to gdb to get bash outputs?
I just did "gdb demo" with no args
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#8 2024-09-25 20:09:20
- seth
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Re: GDB - Input/Output Error Code 126
I didn't create the binary
Who/what did? Is is publically available? Do you have access to the source code? Can you share it?
Also
What exactly is "demo"?
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#9 2024-09-25 21:06:16
- dtexetd
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Re: GDB - Input/Output Error Code 126
I didn't create the binary
Who/what did? Is is publically available? Do you have access to the source code? Can you share it?
Alsoseth wrote:What exactly is "demo"?
It's a course on udemy by Max Kamper
There's some downloads of the files on github
https://github.com/limitedeternity/HeapLAB
https://github.com/ivanmedina/Pwning/tr … AP/HeapLAB
You'll also need lib.so.6 for glibc 2.28 (it isn't in the repo)
../.glibc/glibc_2.28_no-tcache/libc.so.6Offline
#10 2024-09-25 23:10:33
- seth
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Re: GDB - Input/Output Error Code 126
1. which one exactly? All of them?
2.
ldd demo
file ../.glibc/glibc_2.28_no-tcache/ld.so.2Offline
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