https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114677
Bug ID: 114677
Summary: apparent -Wanalyzer-fd-leak false positive
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: analyzer
Assignee: dmalcolm at gcc dot gnu.org
Reporter: levon at movementarian dot org
Target Milestone: ---
Created attachment 57920
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57920&action=edit
reproducer
https://godbolt.org/z/PfKKbPhdP reproduced with today's trunk
Also attached
gives
<source>: In function 'try_bind_socket':
<source>:37:8: warning: leak of file descriptor '*sock' [CWE-775]
[-Wanalyzer-fd-leak]
37 | if (err != 0) {
| ^
'try_bind_socket': events 1-8
|
| 20 | *sock = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| | |
| | (1) when 'socket' succeeds
| 21 | if (*sock < 0) {
| | ~
| | |
| | (2) following 'false' branch...
|......
| 25 | if (setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, &(int){1},
sizeof(int)) < 0) {
| | ~ ~
| | | |
| | | (3)
...to here
| | (4) following 'false' branch...
|......
| 29 | err = bind(*sock, (struct sockaddr *)&addr, sizeof(addr));
| | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| | |
| | (5) ...to here
| 30 |
| 31 | if (err != 0) {
| | ~
| | |
| | (6) following 'false' branch (when 'err == 0')...
|......
| 35 | err = listen(*sock, backlog);
| | ~~~~~~~~~~~~~~~~~~~~~~
| | |
| | (7) ...to here
| 36 |
| 37 | if (err != 0) {
| | ~
| | |
| | (8) '*sock' leaks here
|
this happens regardless of whether we have the (incorrect) close on line 41 or
not
