319 lines
16 KiB
Diff
319 lines
16 KiB
Diff
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From c9c1c9d59a6cfe52f380805a3e91a13ab1a28482 Mon Sep 17 00:00:00 2001
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From: Stephen Hemminger <stephen@networkplumber.org>
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Date: Mon, 8 May 2023 19:15:43 -0700
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Subject: [PATCH] tc_util fix unitialized warning
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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tc_util.c: In function ‘parse_action_control_slash_spaces’:
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tc_util.c:488:28: warning: use of uninitialized value ‘result2’ [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
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488 | *result2_p = result2;
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| ~~~~~~~~~~~^~~~~~~~~
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‘parse_action_control_slash_spaces’: events 1-5
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| 455 | static int parse_action_control_slash_spaces(int *argc_p, char ***argv_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | |
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| | (1) entry to ‘parse_action_control_slash_spaces’
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|......
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| 461 | int result1 = -1, result2;
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| | ~~~~~~~
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| | (2) region created on stack here
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| | (3) capacity: 4 bytes
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|......
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| 467 | switch (ok) {
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| | ~~~~~~
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| | (4) following ‘case 0:’ branch...
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|......
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| 475 | ret = parse_action_control(&argc, &argv,
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| | ~
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| | (5) inlined call to ‘parse_action_control’ from ‘parse_action_control_slash_spaces’
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+--> ‘parse_action_control’: events 6-7
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| 432 | return __parse_action_control(argc_p, argv_p, result_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | |
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| | (6) ...to here
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| | (7) calling ‘__parse_action_control’ from ‘parse_action_control_slash_spaces’
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| 433 | allow_num, false);
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| | ~~~~~~~~~~~~~~~~~
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‘__parse_action_control’: events 8-11
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| 371 | static int __parse_action_control(int *argc_p, char ***argv_p, int *result_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~
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| | (8) entry to ‘__parse_action_control’
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|......
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| 378 | if (!argc)
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| | ~
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| | (9) following ‘false’ branch (when ‘argc != 0’)...
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| 379 | return -1;
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| 380 | if (action_a2n(*argv, &result, allow_num) == -1) {
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| | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | |
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| | (10) ...to here
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| | (11) calling ‘action_a2n’ from ‘__parse_action_control’
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+--> ‘action_a2n’: events 12-16
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| 335 | int action_a2n(char *arg, int *result, bool allow_num)
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| | ^~~~~~~~~~
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| | (12) entry to ‘action_a2n’
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|......
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| 356 | for (iter = a2n; iter->a; iter++) {
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| | ~~~~
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| | (13) following ‘true’ branch...
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| 357 | if (matches(arg, iter->a) != 0)
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| | ~~~~~~~~~~~~~~~~~~~~~
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| | (14) ...to here
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|......
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| 366 | if (result)
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| | ~
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| | (15) following ‘true’ branch (when ‘result’ is non-NULL)...
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| 367 | *result = n;
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| | ~~~~~~~~~~~
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| | (16) ...to here
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<------+
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‘__parse_action_control’: event 17
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| 380 | if (action_a2n(*argv, &result, allow_num) == -1) {
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (17) returning to ‘__parse_action_control’ from ‘action_a2n’
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<------+
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‘parse_action_control_slash_spaces’: event 18
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| 475 | ret = parse_action_control(&argc, &argv,
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| | ^
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| | (18) inlined call to ‘parse_action_control’ from ‘parse_action_control_slash_spaces’
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+--> ‘parse_action_control’: event 19
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| 432 | return __parse_action_control(argc_p, argv_p, result_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (19) returning to ‘parse_action_control_slash_spaces’ from ‘__parse_action_control’
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| 433 | allow_num, false);
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| | ~~~~~~~~~~~~~~~~~
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<------+
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‘parse_action_control_slash_spaces’: events 20-24
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| 477 | if (ret)
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| | ^
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| | (20) following ‘false’ branch...
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| 478 | return ret;
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| 479 | ok++;
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| | ~~~~
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| | (21) ...to here
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|......
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| 487 | if (ok == 2)
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| | ~
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| | (22) following ‘true’ branch (when ‘ok == 2’)...
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| 488 | *result2_p = result2;
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| | ~~~~~~~~~~~~~~~~~~~~
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| | (23) ...to here
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| | (24) use of uninitialized value ‘result2’ here
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tc_util.c:488:28: warning: use of uninitialized value ‘result2’ [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
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488 | *result2_p = result2;
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| ~~~~~~~~~~~^~~~~~~~~
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‘parse_action_control_slash’: events 1-5
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| 505 | int parse_action_control_slash(int *argc_p, char ***argv_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (1) entry to ‘parse_action_control_slash’
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|......
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| 510 | char *p = strchr(*argv, '/');
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| | ~~~~~~~~~~~~~~~~~~
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| | (2) when ‘strchr’ returns NULL
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| 511 |
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| 512 | if (!p)
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| | ~
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| | (3) following ‘true’ branch (when ‘p’ is NULL)...
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| 513 | return parse_action_control_slash_spaces(argc_p, argv_p,
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| | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (4) ...to here
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| | (5) calling ‘parse_action_control_slash_spaces’ from ‘parse_action_control_slash’
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| 514 | result1_p, result2_p,
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| | ~~~~~~~~~~~~~~~~~~~~~
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| 515 | allow_num);
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| | ~~~~~~~~~~
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+--> ‘parse_action_control_slash_spaces’: events 6-10
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| 455 | static int parse_action_control_slash_spaces(int *argc_p, char ***argv_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (6) entry to ‘parse_action_control_slash_spaces’
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|......
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| 461 | int result1 = -1, result2;
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| | ~~~~~~~
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| | (7) region created on stack here
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| | (8) capacity: 4 bytes
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|......
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| 467 | switch (ok) {
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| | ~~~~~~
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| | (9) following ‘case 0:’ branch...
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|......
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| 475 | ret = parse_action_control(&argc, &argv,
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| | ~
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| | (10) inlined call to ‘parse_action_control’ from ‘parse_action_control_slash_spaces’
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+--> ‘parse_action_control’: events 11-12
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| 432 | return __parse_action_control(argc_p, argv_p, result_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (11) ...to here
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| | (12) calling ‘__parse_action_control’ from ‘parse_action_control_slash_spaces’
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| 433 | allow_num, false);
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| | ~~~~~~~~~~~~~~~~~
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‘__parse_action_control’: events 13-16
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| 371 | static int __parse_action_control(int *argc_p, char ***argv_p, int *result_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~
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| | (13) entry to ‘__parse_action_control’
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|......
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| 378 | if (!argc)
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| | ~
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| | (14) following ‘false’ branch (when ‘argc != 0’)...
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| 379 | return -1;
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| 380 | if (action_a2n(*argv, &result, allow_num) == -1) {
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| | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (15) ...to here
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| | (16) calling ‘action_a2n’ from ‘__parse_action_control’
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+--> ‘action_a2n’: events 17-21
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| 335 | int action_a2n(char *arg, int *result, bool allow_num)
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| | ^~~~~~~~~~
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| | (17) entry to ‘action_a2n’
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|......
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| 356 | for (iter = a2n; iter->a; iter++) {
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| | ~~~~
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| | (18) following ‘true’ branch...
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| 357 | if (matches(arg, iter->a) != 0)
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| | ~~~~~~~~~~~~~~~~~~~~~
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| | (19) ...to here
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|......
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| 366 | if (result)
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| | ~
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| | (20) following ‘true’ branch (when ‘result’ is non-NULL)...
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| 367 | *result = n;
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| | ~~~~~~~~~~~
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| | (21) ...to here
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<------+
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‘__parse_action_control’: event 22
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| 380 | if (action_a2n(*argv, &result, allow_num) == -1) {
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (22) returning to ‘__parse_action_control’ from ‘action_a2n’
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<------+
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‘parse_action_control_slash_spaces’: event 23
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| 475 | ret = parse_action_control(&argc, &argv,
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| | ^
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| | (23) inlined call to ‘parse_action_control’ from ‘parse_action_control_slash_spaces’
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+--> ‘parse_action_control’: event 24
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| 432 | return __parse_action_control(argc_p, argv_p, result_p,
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| | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (24) returning to ‘parse_action_control_slash_spaces’ from ‘__parse_action_control’
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| 433 | allow_num, false);
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| | ~~~~~~~~~~~~~~~~~
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<------+
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‘parse_action_control_slash_spaces’: events 25-29
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| 477 | if (ret)
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| | ^
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| | (25) following ‘false’ branch...
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| 478 | return ret;
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| 479 | ok++;
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| | ~~~~
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| | (26) ...to here
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|......
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| 487 | if (ok == 2)
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| | ~
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| | (27) following ‘true’ branch (when ‘ok == 2’)...
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| 488 | *result2_p = result2;
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| | ~~~~~~~~~~~~~~~~~~~~
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| | (28) ...to here
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| | (29) use of uninitialized value ‘result2’ here
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Fixes: e67aba559581 ("tc: actions: add helpers to parse and print control actions")
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Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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---
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tc/tc_util.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/tc/tc_util.c b/tc/tc_util.c
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index 0714134e..ed9efa70 100644
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--- a/tc/tc_util.c
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+++ b/tc/tc_util.c
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@@ -458,7 +458,7 @@ static int parse_action_control_slash_spaces(int *argc_p, char ***argv_p,
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{
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int argc = *argc_p;
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char **argv = *argv_p;
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- int result1 = -1, result2;
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+ int result1 = -1, result2 = -1;
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int *result_p = &result1;
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int ok = 0;
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int ret;
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--
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2.27.0
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