[Bug 1955129] Re: trace-cmd report buffer overflow detected
Ubuntu Foundations Team Bug Bot
1955129 at bugs.launchpad.net
Fri Dec 17 16:23:37 UTC 2021
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https://bugs.launchpad.net/bugs/1955129
Title:
trace-cmd report buffer overflow detected
Status in trace-cmd package in Ubuntu:
In Progress
Status in trace-cmd source package in Bionic:
In Progress
Bug description:
[IMPACT]
When running trace-cmd report on Bionic it crashes with
*** buffer overflow detected ***: trace-cmd terminated
Aborted (core dumped)
[TEST CASE]
Prepare a simple script to trace e.g. :
#!/usr/bin/python
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.close()
then
$ sudo trace-cmd record -a -p function_graph -g __fput -g sock_close
-g tcp_close python2 ./close.py
$ sudo trace-cmd report
The latter will fail with buffer overflow detected
[WHERE THINGS COULD GO WRONG]
The fixing commit changes the size of a buffer from 20 to 24 in arg_eval() function
to avoid buffer overflow.
Any potential regression would occur in that function.
[OTHER]
Only Bionic is affected, it is fixed in newer releases.
Fix upstream commit 1375d98d8017e371776adbef10122a57ce2100e5
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