CVE-2021-47300 bpf: Fix tail_call_reachable rejection for interpreter when jit failed

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix tailcallreachable rejection for interpreter when jit failed During testing of f263a81451c1 "bpf: Track subprog poke descriptors correctly and fix use-after-free" under various failure conditions, for example, when...

CVE-2021-47300

CVE-2021-47300 – Linux kernel (bpf tail_call_reachable bug) Affects: Linux kernel with BPF tail-call support in interpreter/JIT paths. The issue arises when tail_call_reachable was not properly propagated during JIT/epilogue handling, due to a tracker added in check_max_stack_depth(), causing tai...

CVE-2021-47300 bpf: Fix tail_call_reachable rejection for interpreter when jit failed

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix tailcallreachable rejection for interpreter when jit failed During testing of f263a81451c1 "bpf: Track subprog poke descriptors correctly and fix use-after-free" under various failure conditions, for example, when...