CVE-2023-54086 bpf: Add preempt_count_{sub,add} into btf id deny list

In the Linux kernel, the following vulnerability has been resolved: bpf: Add preemptcountsub,add into btf id deny list The recursion check in bpfprogenter and bpfprogexit leave preemptcountsub,add unprotected. When attaching trampoline to them we get panic as follows, 867.843050 BUG: TASK stack...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in Linux kernel that stems from unprotected preemptcountsub and preemptcountadd, which could result in a recursive check and a stack protection...