tests: shell: add crash reproducer

Two reports point to a crash in nft when 'flush' is provided
on existing ruleset.  In that case, nft will crash with a null-ptr
dereference.

"evaluate: do not inconditionally update cache from flush command"
causes the commit to fail due to a cache inconsistency, we then trip
over NULL location->indesc.  Cause of 2nd bug not known yet, not sure
how to fix cache issue either, so only adding reproducer so this can be
fixed later.

Without erec bug, the (errnoeous) error message would be
Could not process rule: File exists

Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Reported-by: Timothy Redaelli <tredaelli@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>

diff --git a/tests/shell/testcases/cache/0001_cache_handling_0 b/tests/shell/testcases/cache/0001_cache_handling_0
index 20c19117033d1a2f14fe196559e82d03990af5da..77afdf8d907281794d635df807d7bb658672ca9f 100755 (executable)
--- a/tests/shell/testcases/cache/0001_cache_handling_0
+++ b/tests/shell/testcases/cache/0001_cache_handling_0
@@ -16,6 +16,10 @@ table inet test {
 set -e
 
 $NFT -f - <<< $RULESET
+TMP=$(mktemp)
+echo "$RULESET" >> "$TMP"
+$NFT "flush ruleset;include \"$TMP\""
+rm -f "$TMP"
 rule_handle=$($NFT list ruleset -a | awk '/saddr/{print $NF}')
 $NFT delete rule inet test test handle $rule_handle
 $NFT delete set inet test test