In netdev_offload_dpdk_flow_create() when an offload request fails,
dump_flow() is called to log a warning message. The 's_tnl' string
in flow_patterns gets initialized in vport_to_rte_tunnel() conditionally
via ds_put_format(). If it is not initialized, it crashes later in
dump_flow_attr()->ds_clone()->memcpy() while dereferencing this string.
To fix this, check if memory for the src string has been allocated,
before copying it to the dst string.
Fixes: fa44a4a3ff7b ("ovn-controller: Persist desired conntrack groups.")
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapa...@broadcom.com>
---
v1->v2: fix ds_clone(); ds_cstr() not needed in callers.
---
lib/dynamic-string.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib/dynamic-string.c b/lib/dynamic-string.c
index 6f7b610a9..fd0127ed1 100644
--- a/lib/dynamic-string.c
+++ b/lib/dynamic-string.c
@@ -460,6 +460,10 @@ ds_chomp(struct ds *ds, int c)
void
ds_clone(struct ds *dst, struct ds *source)
{
+ if (!source->allocated) {
+ ds_init(dst);
+ return;
+ }
dst->length = source->length;
dst->allocated = dst->length;
dst->string = xmalloc(dst->allocated + 1);
--
2.30.0.349.g30b29f044a
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