Source: wmctrl Version: 1.07+git20240228.1105759-1 Severity: normal Tags: patch, upstream wmctrl crashes with a segmentation fault when listing information about X11 window that does not have the WM_CLIENT_MACHINE property.
The crash occurs in display_window(), which calls strlen() on the value returned by get_property(). When WM_CLIENT_MACHINE is absent, get_property() returns NULL, resulting in strlen(NULL). The issue can be reproduced as follows: $ wmctrl -l 0x00800008 -1 N/A tint2 0x0100000e 0 x86 linux@x86: ~ The first window does not have WM_CLIENT_MACHINE and crashes when information is requested: $ wmctrl -i -p 0x00800008 -L Segmentation fault Whereas a window with WM_CLIENT_MACHINE works correctly: $ wmctrl -i -r 0x0100000e -L 0x0100000e 0 x86 linux@x86: ~ Please consider applying the attached patch, which checks for NULL before calling strlen().
0001-wmctrl-fix-null-WM_CLIENT_MACHINE.patch
Description: 0001-wmctrl-fix-null-WM_CLIENT_MACHINE.patch
