The following C code can cause the buffer to overflow if the user enters more than ten characters. A buffer overflow occurs when the user input exceeds the buffer capacity. home/haypo/prog/python/2.7/Modules/_cursesmodule. How is stack smashing detected Usually, the compiler generates the stack smashing detected error in response to its defense mechanism against buffer overflows. 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 _curses module cannot be compiled anymore: New changeset b694770a2b23cd485c98bf673a8b2dc1a865d9df by Serhiy Storchaka (Miss Islington (bot)) in branch '2.7':īpo-27666: Fixed stack corruption in curses.box() and curses.ungetmouse(). And while execute the following code it gives stack smashing detected. New changeset aad7ac10af6ed40fc21b842e04be0b04b2915d4a by Serhiy Storchaka (Miss Islington (bot)) in branch '3.6':īpo-27666: Fixed stack corruption in curses.box() and curses.ungetmouse(). I wrote a very simple c++ program to generate random string. It is better to use P圜urses_ConvertToChtype() which is used for parsing all chtype arguments.
STACK SMASHING DETECTED 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. We are importing a large batch of records with mysqlimport tool. Most places are very careful about this if needed, they'll parse into a 'long' temporary and then assign. mysqlimport - stack smashing detected and segmentation fault. It is hard to fit 8 bytes into a 4 byte variable. I was getting 'stack smashing detected' disconnects with x11vnc- on Fedora 29, and fixed it by building a new binary of x11vnc-0.9.
STACK SMASHING DETECTED INSTALL
(I am on a fresh install of Fedora 24 x86_64.) The format string 'l' is writing 8 bytes. No matter what the number entered it always results in a stack smash. 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: stack smashing detected error occurs when as the name suggests, you smash the stack, meaning that you have a buffer overflow and the canary gets overwritten by. 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 14:58 by admin. "stack smashing detected" in P圜ursesWindow_Box
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