CVE-2026-99219

In the Linux kernel, the following vulnerability has been resolved:

ftrace: Initialize modname and offset in print rec()

print rec() leaves 'modname' and 'offset' uninitialized and kallsyms lookup() only sets them on success. When the lookup fails like when a module is being loaded or unloaded, 'modname' holds a garbage value, passes the 'if (modname)' check, and is dereferenced by seq printf().

Oops: general protection fault RIP: 0010:string+0x48/0xe0 Call Trace: vsnprintf+0x1f5/0x650 seq printf+0x8e/0xb0 print rec+0x6c/0xc0 t show+0x4c/0x440 seq read iter+0x119/0x480

This can be triggered by reading available filter functions while a module is being loaded or unloaded.

Initialize both variables so a failed lookup skips the module name.