Thanks, applied and backported.
On Thu, Oct 11, 2018 at 01:08:43PM -0700, Yifeng Sun wrote: > Looks good to me, thanks. > > Reviewed-by: Yifeng Sun <[email protected]> > > On Thu, Oct 11, 2018 at 12:44 PM Ben Pfaff <[email protected]> wrote: > > > OVN expression syntax does not allow a literal empty value set, like {}. > > Rather, any literal value set has to have at least one value. However, > > value sets that originate from address sets or from port groups can be > > empty. In such a case, == and != comparisons are allowed but < <= >= > > > should be errors. The actual implementation failed to properly disallow > > the latter and instead tried to access the first element of the value set, > > a bad read. This fixes the problem. > > > > Reported-at: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10731 > > Reported-at > > <https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10731Reported-at>: > > https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10767 > > Signed-off-by > > <https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=10767Signed-off-by>: > > Ben Pfaff <[email protected]> > > --- > > ovn/lib/expr.c | 5 +++++ > > tests/ovn.at | 2 ++ > > 2 files changed, 7 insertions(+) > > > > diff --git a/ovn/lib/expr.c b/ovn/lib/expr.c > > index 148ac869e861..16dd1776b543 100644 > > --- a/ovn/lib/expr.c > > +++ b/ovn/lib/expr.c > > @@ -578,6 +578,11 @@ make_cmp(struct expr_context *ctx, > > f->symbol->name); > > goto exit; > > } > > + if (!cs->n_values) { > > + lexer_error(ctx->lexer, "Only == and != operators may be used > > " > > + "to compare a field against an empty value set."); > > + goto exit; > > + } > > if (cs->values[0].masked) { > > lexer_error(ctx->lexer, "Only == and != operators may be used > > " > > "with masked constants. Consider using subfields > > " > > diff --git a/tests/ovn.at b/tests/ovn.at > > index 44475175d20a..94676a9aa802 100644 > > --- a/tests/ovn.at > > +++ b/tests/ovn.at > > @@ -351,6 +351,8 @@ eth.dst[40] x => Syntax error at `x' expecting end of > > input. > > > > ip4.src == {1.2.3.4, $set1, $unknownset} => Syntax error at `$unknownset' > > expecting address set name. > > eth.src == {$set3, badmac, 00:00:00:00:00:01} => Syntax error at `badmac' > > expecting constant. > > + > > +ct_label > $set4 => Only == and != operators may be used to compare a > > field against an empty value set. > > ]]) > > sed 's/ =>.*//' test-cases.txt > input.txt > > sed 's/.* => //' test-cases.txt > expout > > -- > > 2.16.1 > > > > _______________________________________________ > > dev mailing list > > [email protected] > > https://mail.openvswitch.org/mailman/listinfo/ovs-dev > > _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
