diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2024-03-08 08:38:08 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-03-15 05:28:52 +0300 |
| commit | e60adf513275c3a38e5cb67f7fd12387e43a3ff5 (patch) | |
| tree | f154a2a436cb986c45b30f5090aca12218d43a2c /arch/s390/net | |
| parent | 7d2cc63eca0c993c99d18893214abf8f85d566d8 (diff) | |
| download | linux-e60adf513275c3a38e5cb67f7fd12387e43a3ff5.tar.xz | |
bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()
set_memory_rox() can fail, leaving memory unprotected.
Check return and bail out when bpf_jit_binary_lock_ro() returns
an error.
Link: https://github.com/KSPP/linux/issues/7
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: linux-hardening@vger.kernel.org <linux-hardening@vger.kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Puranjay Mohan <puranjay12@gmail.com>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> # s390x
Acked-by: Tiezhu Yang <yangtiezhu@loongson.cn> # LoongArch
Reviewed-by: Johan Almbladh <johan.almbladh@anyfinetworks.com> # MIPS Part
Message-ID: <036b6393f23a2032ce75a1c92220b2afcb798d5d.1709850515.git.christophe.leroy@csgroup.eu>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch/s390/net')
| -rw-r--r-- | arch/s390/net/bpf_jit_comp.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c index b418333bb086..e613eebfd349 100644 --- a/arch/s390/net/bpf_jit_comp.c +++ b/arch/s390/net/bpf_jit_comp.c @@ -2111,7 +2111,11 @@ skip_init_ctx: print_fn_code(jit.prg_buf, jit.size_prg); } if (!fp->is_func || extra_pass) { - bpf_jit_binary_lock_ro(header); + if (bpf_jit_binary_lock_ro(header)) { + bpf_jit_binary_free(header); + fp = orig_fp; + goto free_addrs; + } } else { jit_data->header = header; jit_data->ctx = jit; |