tcptop: Filter out negative values in receive probe

When tcp_cleanup_rbuf() is called from tcp_recvmsg(), "copied" may be an error code, especially -EAGAIN for non-blocking receives.
weibang6liu · Aug 11, 2017 · 81ad054 · 81ad054
1 parent 8e86b9e
commit 81ad054
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/tools/tcptop.py b/tools/tcptop.py
@@ -148,6 +148,9 @@ def range_check(string):
  u16 dport = 0, family = sk->__sk_common.skc_family;
  u64 *val, zero = 0;
 
+ if (copied <= 0)
+ return 0;
+
  if (family == AF_INET) {
  struct ipv4_key_t ipv4_key = {.pid = pid};
  ipv4_key.saddr = sk->__sk_common.skc_rcv_saddr;