CVE-2024-50203

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bpf, arm64: Fix address emission with tag-based KASAN enabled<br /> <br /> When BPF_TRAMP_F_CALL_ORIG is enabled, the address of a bpf_tramp_image<br /> struct on the stack is passed during the size calculation pass and<br /> an address on the heap is passed during code generation. This may<br /> cause a heap buffer overflow if the heap address is tagged because<br /> emit_a64_mov_i64() will emit longer code than it did during the size<br /> calculation pass. The same problem could occur without tag-based<br /> KASAN if one of the 16-bit words of the stack address happened to<br /> be all-ones during the size calculation pass. Fix the problem by<br /> assuming the worst case (4 instructions) when calculating the size<br /> of the bpf_tramp_image address emission.