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The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". ![]() When PCI tree is large, we get stack smashing with 'lspci -vt' - although it only happens at the end, so technically it has already prin. This cookie is set by GDPR Cookie Consent plugin. Noticed on lspci versions 3.5.2 and 3.6.2 when fourth Thunderbolt device in daisy-chain is attached. #Stack smashing detected in c code#I would have pasted the code here but its approx 2000 lines. These cookies ensure basic functionalities and security features of the website, anonymously. I am stuck for 1 week in a stack smashing detected bug in my C program running in a i386 desktop with Ubuntu 7.0.4. After execution the program runs for some time then exits with the message: stack smashing detected. home/haypo/prog/python/2.7/Modules/_cursesmodule.Necessary cookies are absolutely essential for the website to function properly. P圜urses_ConvertToChtype(PyObject *obj, chtype *ch) If (!P圜urses_ConvertToChtype(self, temp1, &ch1)) ' home/haypo/prog/python/2.7/Modules/_cursesmodule.c:649:39: warning: passing argument 1 of 'P圜urses_ConvertToChtype' from incompatible pointer type home/haypo/prog/python/2.7/Modules/_cursesmodule.c: In function 'P圜ursesWindow_Box': The problem is that if I try to put this exact same code into a separate function called crystalkeystroke(), change the last line to return response.data0 as the result, and call 'int keypress crystalkeystroke()' from main, the program craps out with a backtrace and the complaint 'Stack smashing detected. stacksmash Enter the name TheGeekStuff len 26214 len of string entered is : 12 So we see that once the code was compiled with this flag then with the same input, the execution environment was not able to detect buffer overflow that actually happened and corrupted the value of variable ‘len’. The _curses module cannot be compiled anymore: gcc -Wall -fno-stack-protector stacksmash.c -o stacksmash. New changeset b694770a2b23cd485c98bf673a8b2dc1a865d9df by Serhiy Storchaka (Miss Islington (bot)) in branch '2.7':īpo-27666: Fixed stack corruption in curses.box() and curses.ungetmouse(). I've updated the multichain to the newest version (1.0 alpha 29). New changeset aad7ac10af6ed40fc21b842e04be0b04b2915d4a by Serhiy Storchaka (Miss Islington (bot)) in branch '3.6':īpo-27666: Fixed stack corruption in curses.box() and curses.ungetmouse(). It is better to use P圜urses_ConvertToChtype() which is used for parsing all chtype arguments. #Stack smashing detected in c Patch#I'm running now (successfully) with a simpler patch, just changing it to parse format 'i', but this patch is probably a bit safer.Īuthor: Serhiy Storchaka (serhiy.storchaka) * But here's another one in P圜urses_UngetMouse:Įvent.bstate is of type mmask_t, which is also 4 bytes. Most places are very careful about this if needed, they'll parse into a 'long' temporary and then assign. ![]() It is hard to fit 8 bytes into a 4 byte variable. #Stack smashing detected in c install#(I am on a fresh install of Fedora 24 x86_64.) The format string 'l' is writing 8 bytes. If (!PyArg_ParseTuple(args,"ll vertint,horint", &ch1, &ch2))Ĭh1 and ch2 are of type 'chtype', which is a 4-byte integer on my platform. The problem is in P圜ursesWindow_Box in _cursesmodule.c: When attempting to run |hg chistedit|, which uses the python curses module, I am getting *** stack smashing detected ***: /usr/bin/python terminated Steve Fink, serhiy.storchaka, twouters, vstinnerĬreated on 23:52 by Steve Fink, last changed 07:56 by serhiy.storchaka. SSP merely detects stack buffer overruns, they are not prevented. "stack smashing detected" in P圜ursesWindow_Box The Stack Smashing Protector (SSP) compiler feature helps detect stack buffer overrun by aborting if a secret value on the stack is changed.This serves a dual purpose in making the occurrence of such bugs visible and as exploit mitigation against return-oriented programming. ![]()
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