diff options
| author | Alexei Starovoitov <ast@kernel.org> | 2023-12-15 16:45:49 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2023-12-18 12:00:37 +0100 |
| commit | 0c970ed2f87c058fe3ddeb4d7d8f64f72cf41d7a (patch) | |
| tree | fbc54c4fe55753c3fb80e6832782007a0f6ef186 /arch/s390 | |
| parent | 42d45c45624a098a9fdc477c7a8b86167f948c77 (diff) | |
s390/bpf: Fix indirect trampoline generation
The func_addr used to be NULL for indirect trampolines used by struct_ops.
Now func_addr is a valid function pointer.
Hence use BPF_TRAMP_F_INDIRECT flag to detect such condition.
Fixes: 2cd3e3772e41 ("x86/cfi,bpf: Fix bpf_struct_ops CFI")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/bpf/20231216004549.78355-1-alexei.starovoitov@gmail.com
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/net/bpf_jit_comp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c index cc129617480a..7f0a7b97ef4c 100644 --- a/arch/s390/net/bpf_jit_comp.c +++ b/arch/s390/net/bpf_jit_comp.c @@ -2362,7 +2362,8 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, return -ENOTSUPP; /* Return to %r14, since func_addr and %r0 are not available. */ - if (!func_addr && !(flags & BPF_TRAMP_F_ORIG_STACK)) + if ((!func_addr && !(flags & BPF_TRAMP_F_ORIG_STACK)) || + (flags & BPF_TRAMP_F_INDIRECT)) flags |= BPF_TRAMP_F_SKIP_FRAME; /* |