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| author |  Christophe Leroy <christophe.leroy@csgroup.eu>
| 2024-03-08 06:38:08 +0100 |
|---|---|---|
| committer |  Alexei Starovoitov <ast@kernel.org>
| 2024-03-14 19:28:52 -0700 |
| commit | e60adf513275c3a38e5cb67f7fd12387e43a3ff5 (patch) | |
| tree | f154a2a436cb986c45b30f5090aca12218d43a2c /arch/parisc | |
| parent | bpf: Take return from set_memory_ro() into account with bpf_prog_lock_ro() (diff) | |
| download | linux-e60adf513275c3a38e5cb67f7fd12387e43a3ff5.tar.gz linux-e60adf513275c3a38e5cb67f7fd12387e43a3ff5.tar.bz2 linux-e60adf513275c3a38e5cb67f7fd12387e43a3ff5.zip | |
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/parisc')
| -rw-r--r-- | arch/parisc/net/bpf_jit_core.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/parisc/net/bpf_jit_core.c b/arch/parisc/net/bpf_jit_core.c index d6ee2fd45550..979f45d4d1fb 100644 --- a/arch/parisc/net/bpf_jit_core.c +++ b/arch/parisc/net/bpf_jit_core.c @@ -167,7 +167,13 @@ skip_init_ctx: bpf_flush_icache(jit_data->header, ctx->insns + ctx->ninsns); if (!prog->is_func || extra_pass) { - bpf_jit_binary_lock_ro(jit_data->header); + if (bpf_jit_binary_lock_ro(jit_data->header)) { + bpf_jit_binary_free(jit_data->header); + prog->bpf_func = NULL; + prog->jited = 0; + prog->jited_len = 0; + goto out_offset; + } prologue_len = ctx->epilogue_offset - ctx->body_len; for (i = 0; i < prog->len; i++) ctx->offset[i] += prologue_len; |