@@ -1074,10 +1074,9 @@ static void sym_check_print_recursive(struct symbol *last_sym)
{
struct dep_stack *stack;
struct symbol *sym, *next_sym;
- struct menu *menu = NULL;
struct menu *choice;
- struct property *prop;
struct dep_stack cv_stack;
+ enum prop_type type;
choice = sym_get_choice_menu(last_sym);
if (choice) {
@@ -1096,53 +1095,36 @@ static void sym_check_print_recursive(struct symbol *last_sym)
for (; stack; stack = stack->next) {
sym = stack->sym;
next_sym = stack->next ? stack->next->sym : last_sym;
- prop = stack->prop;
- if (prop == NULL)
- prop = stack->sym->prop;
-
- /* for choice values find the menu entry (used below) */
- if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
- for (prop = sym->prop; prop; prop = prop->next) {
- menu = prop->menu;
- if (prop->menu)
- break;
- }
- }
+ type = stack->prop ? stack->prop->type : P_UNKNOWN;
+
if (stack->sym == last_sym)
- fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
- prop->filename, prop->lineno);
+ fprintf(stderr, "error: recursive dependency detected!\n");
if (sym_is_choice(next_sym)) {
choice = list_first_entry(&next_sym->menus, struct menu, link);
- fprintf(stderr, "%s:%d:\tsymbol %s is part of choice block at %s:%d\n",
- menu->filename, menu->lineno,
+ fprintf(stderr, "\tsymbol %s is part of choice block at %s:%d\n",
sym->name ? sym->name : "<choice>",
choice->filename, choice->lineno);
} else if (stack->expr == &sym->dir_dep.expr) {
- fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
- prop->filename, prop->lineno,
+ fprintf(stderr, "\tsymbol %s depends on %s\n",
sym->name ? sym->name : "<choice>",
next_sym->name);
} else if (stack->expr == &sym->rev_dep.expr) {
- fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
- prop->filename, prop->lineno,
+ fprintf(stderr, "\tsymbol %s is selected by %s\n",
sym->name, next_sym->name);
} else if (stack->expr == &sym->implied.expr) {
- fprintf(stderr, "%s:%d:\tsymbol %s is implied by %s\n",
- prop->filename, prop->lineno,
+ fprintf(stderr, "\tsymbol %s is implied by %s\n",
sym->name, next_sym->name);
} else if (stack->expr) {
- fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
- prop->filename, prop->lineno,
+ fprintf(stderr, "\tsymbol %s %s value contains %s\n",
sym->name ? sym->name : "<choice>",
- prop_get_type_name(prop->type),
+ prop_get_type_name(type),
next_sym->name);
} else {
- fprintf(stderr, "%s:%d:\tsymbol %s %s is visible depending on %s\n",
- prop->filename, prop->lineno,
+ fprintf(stderr, "\tsymbol %s %s is visible depending on %s\n",
sym->name ? sym->name : "<choice>",
- prop_get_type_name(prop->type),
+ prop_get_type_name(type),
next_sym->name);
}
}
@@ -1,38 +1,38 @@
-Kconfig:5:error: recursive dependency detected!
-Kconfig:5: symbol A depends on A
+error: recursive dependency detected!
+ symbol A depends on A
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
-Kconfig:11:error: recursive dependency detected!
-Kconfig:11: symbol B is selected by B
+error: recursive dependency detected!
+ symbol B is selected by B
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
-Kconfig:17:error: recursive dependency detected!
-Kconfig:17: symbol C1 depends on C2
-Kconfig:21: symbol C2 depends on C1
+error: recursive dependency detected!
+ symbol C1 depends on C2
+ symbol C2 depends on C1
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
-Kconfig:27:error: recursive dependency detected!
-Kconfig:27: symbol D1 depends on D2
-Kconfig:32: symbol D2 is selected by D1
+error: recursive dependency detected!
+ symbol D1 depends on D2
+ symbol D2 is selected by D1
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
-Kconfig:37:error: recursive dependency detected!
-Kconfig:37: symbol E1 depends on E2
-Kconfig:42: symbol E2 is implied by E1
+error: recursive dependency detected!
+ symbol E1 depends on E2
+ symbol E2 is implied by E1
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
-Kconfig:49:error: recursive dependency detected!
-Kconfig:49: symbol F1 default value contains F2
-Kconfig:51: symbol F2 depends on F1
+error: recursive dependency detected!
+ symbol F1 default value contains F2
+ symbol F2 depends on F1
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
-Kconfig:60:error: recursive dependency detected!
-Kconfig:60: symbol G depends on G
+error: recursive dependency detected!
+ symbol G depends on G
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
This prevents segfault when getting filename and lineno in recursive checks. If the following snippet is found in Kconfig: [Test code 1] config FOO bool depends on BAR select BAR ... without BAR defined; then there is a segfault. Kconfig:34:error: recursive dependency detected! Kconfig:34: symbol FOO depends on BAR make[4]: *** [scripts/kconfig/Makefile:85: allnoconfig] Segmentation fault This is because of the following. BAR is a fake entry created by sym_lookup() with prop being NULL. In the recursive check, there is a NULL check for prop to fall back to stack->sym->prop if stack->prop is NULL. However, in this case, stack->sym points to the fake BAR entry created by sym_lookup(), so prop is still NULL. prop was then referenced without additional NULL checks, causing segfault. As the previous email thread suggests, the file and lineno for select is also wrong: [Test code 2] config FOO bool config BAR bool config FOO bool "FOO" depends on BAR select BAR $ make defconfig *** Default configuration is based on 'x86_64_defconfig' Kconfig:1:error: recursive dependency detected! Kconfig:1: symbol FOO depends on BAR Kconfig:4: symbol BAR is selected by FOO [...] Kconfig:4 should be Kconfig:10. This patch deletes the wrong and segfault-prone filename/lineno inference completely. With this patch, Test code 1 yields: error: recursive dependency detected! symbol FOO depends on BAR symbol BAR is selected by FOO Link: https://lore.kernel.org/linux-kbuild/20240627231919.2461945-1-elsk@google.com/T/ Link: https://lore.kernel.org/linux-kbuild/20240620211112.500465-1-elsk@google.com/ Link: https://lore.kernel.org/linux-kbuild/20240618185609.4096399-1-elsk@google.com/ Signed-off-by: HONG Yifan <elsk@google.com> -- v4: Rebased & addressed comments from masahiroy@kernel.org. Simplify code by dropping `prop` variable. v3: Rebase on top of https://lore.kernel.org/linux-kbuild/20240626182212.3758235-1-masahiroy@kernel.org/T/#t & resolve merge conflicts. Fix scripts/kconfig/tests/err_recursive_dep/expected_stderr v2: Delete all filenames/lineno completely as suggested by masahiroy@kernel.org --- scripts/kconfig/symbol.c | 42 ++++++------------- .../tests/err_recursive_dep/expected_stderr | 36 ++++++++-------- 2 files changed, 30 insertions(+), 48 deletions(-)