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.
Bu kayıt NIST NVD kaynağından aktarılmıştır. Etkilenen sürümler, güncel değerlendirme ve üretici referansları için kaynak kaydı inceleyin.