SEGV at manage_event in SDLLaffgif.c:15

[ambrosecm]

Desctiption

When I run the main function of SDLLaffgif.c, a segmentation fault (SEGV) was triggered at manage_event in SDLLaffgif.c:15
potentially resulting in display abnormalities or crash across the entire Linux system.

ngiflib/SDLaffgif.c

Lines 188 to 190 in fbf2d0c

	for(;;) {
	manage_event();
	}

ngiflib/SDLaffgif.c

Lines 13 to 15 in fbf2d0c

	void manage_event() {
	SDL_Event event;
	SDL_WaitEvent(&event);

Test Environment

Ubuntu 22.04.1, 64bit
ngiflib(master fbf2d0c)
program source file

How to trigger

Download the poc file , program and run the following cmd:

 $ ./main_ ./poc

Detail

GDB report

[miniupnp]

I don't reproduce.
And I don't understand what is the issue.

SDLaffgif just exits with the message
Failed to read invalid_gif/issue_43_poc

[ambrosecm]

But in my machine it shows the following message

[miniupnp]

GIF8F8
14394x48952 1bits 2 couleurs  bg=66
BLOCK SIGNATURE 0x2C ','
*** WARNING *** Adjusting X position
img pos(2,14904) size 14392x64 palbits=1 imgbits=0 ncolors=2
getc() returned EOF !
restbyte = 00
Code clear (1) (free=3) npix=921088
Invalid code 1 just after clear(1) !
Failed to read invalid_gif/issue_43_poc

[miniupnp]

maybe you build with NGIFLIB_NO_FILE defined ?

[miniupnp]

With NGIFLIB_NO_FILE defined, I also have the same behavior

Failed to read invalid_gif/issue_43_poc