Messages in this thread Patch in this message | | | From | Tycho Andersen <> | Subject | [PATCH v3 5/5] bpf: save the program the user actually supplied | Date | Wed, 30 Sep 2015 12:13:40 -0600 |
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In some cases (e.g. seccomp) the program result might be translated from the original program the user supplied. If we're saving the result for checkpoint/restore, we should save exactly the program the user initially supplied.
This causes problems when the translations seccomp makes are not allowed by bpf_check_classic.
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com> CC: Kees Cook <keescook@chromium.org> CC: Will Drewry <wad@chromium.org> CC: Oleg Nesterov <oleg@redhat.com> CC: Andy Lutomirski <luto@amacapital.net> CC: Pavel Emelyanov <xemul@parallels.com> CC: Serge E. Hallyn <serge.hallyn@ubuntu.com> CC: Alexei Starovoitov <ast@kernel.org> CC: Daniel Borkmann <daniel@iogearbox.net> --- net/core/filter.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/net/core/filter.c b/net/core/filter.c index 70995dd..5a4596b 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -845,8 +845,7 @@ int bpf_prog_store_orig_filter(struct bpf_prog *fp, fkprog = fp->orig_prog; fkprog->len = fprog->len; - fkprog->filter = kmemdup(fp->insns, fsize, - GFP_KERNEL | __GFP_NOWARN); + fkprog->filter = memdup_user(fprog->filter, fsize); if (!fkprog->filter) { kfree(fp->orig_prog); return -ENOMEM; -- 2.5.0
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