CVE-2023-54056

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

kheaders: Use array declaration instead of char

Under CONFIGFORTIFYSOURCE, memcpy() will check the size of destination and source buffers. Defining kernelheadersdata as "char" would trip this check. Since these addresses are treated as byte arrays, define them as arrays (as done everywhere else).

This was seen with:

$ cat /sys/kernel/kheaders.tar.xz >> /dev/null

detected buffer overflow in memcpy kernel BUG at lib/stringhelpers.c:1027! ... RIP: 0010:fortifypanic+0xf/0x20 [...] Call Trace: <TASK> ikheadersread+0x45/0x50 [kheaders] kernfsfopreaditer+0x1a4/0x2f0 ...