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BUG/MEDIUM: WURFL: segfault in wurfl-get() with missing info.

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A segfault may happen in ha_wurfl_get() when dereferencing information not
present in wurfl-information-list. Check the node retrieved from the tree,
not its container.

This fix must be backported to 1.9.
This commit is contained in:
mbellomi 2019-05-21 15:32:48 +02:00 committed by Willy Tarreau
parent 0a7a4fbbc8
commit d173e93aa7
1 changed files with 3 additions and 2 deletions
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5
src/wurfl.c
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@ -514,9 +514,10 @@ static int ha_wurfl_get(const struct arg *args, struct sample *smp, const char *
while (args[i].data.str.area) {
chunk_appendf(temp, "%c", global_wurfl.information_list_separator);
node = ebst_lookup(&global_wurfl.btree, args[i].data.str.area);
wn = container_of(node, wurfl_data_t, nd);
if (wn) {
if (node) {
wn = container_of(node, wurfl_data_t, nd);
switch(wn->type) {
case HA_WURFL_DATA_TYPE_UNKNOWN :