Using signed integer to represent counts can troube some gcc optimisation passes, for example in https://github.com/fishilico/selinux/runs/2125501324?check_suite_focus=true#step:9:107 In function ‘name_list_to_string’, inlined from ‘constraint_expr_to_string’ at module_to_cil.c:1799:11: module_to_cil.c:1156:8: error: argument 1 range [18446744071562067968, 18446744073709551615] exceeds maximum object size 9223372036854775807 [-Werror=alloc-size-larger-than=] 1156 | str = malloc(len); | ^~~~~~~~~~~ In file included from module_to_cil.c:39: module_to_cil.c: In function ‘constraint_expr_to_string’: /usr/include/stdlib.h:539:14: note: in a call to allocation function ‘malloc’ declared here 539 | extern void *malloc (size_t __size) __THROW __attribute_malloc__ | ^~~~~~ The wide range (from 18446744071562067968 = 0xffffffff80000000 to 18446744073709551615 = 0xffffffffffffffff) was caused by num_names being a signed int used in "len += num_names;", even though it should always be non-negative. Prevent such issues from occurring by using "unsigned int" where appropriate. Signed-off-by: Nicolas Iooss <nicolas.iooss@xxxxxxx> --- libsepol/src/module_to_cil.c | 62 ++++++++++++++++++------------------ 1 file changed, 31 insertions(+), 31 deletions(-) diff --git a/libsepol/src/module_to_cil.c b/libsepol/src/module_to_cil.c index a87bc15e7610..cb1069caffdf 100644 --- a/libsepol/src/module_to_cil.c +++ b/libsepol/src/module_to_cil.c @@ -717,9 +717,9 @@ exit: return rc; } -static int num_digits(int n) +static unsigned int num_digits(unsigned int n) { - int num = 1; + unsigned int num = 1; while (n >= 10) { n /= 10; num++; @@ -945,7 +945,7 @@ static char *search_attr_list(struct list *attr_list, int is_type, void *set) return NULL; } -static int set_to_names(struct policydb *pdb, int is_type, void *set, struct list *attr_list, char ***names, int *num_names) +static int set_to_names(struct policydb *pdb, int is_type, void *set, struct list *attr_list, char ***names, unsigned int *num_names) { char *attr_name = NULL; int rc = 0; @@ -982,12 +982,12 @@ exit: return rc; } -static int ebitmap_to_names(struct ebitmap *map, char **vals_to_names, char ***names, int *num_names) +static int ebitmap_to_names(struct ebitmap *map, char **vals_to_names, char ***names, unsigned int *num_names) { int rc = 0; struct ebitmap_node *node; uint32_t i; - uint32_t num; + unsigned int num; char **name_arr; num = 0; @@ -1026,7 +1026,7 @@ exit: return rc; } -static int process_roleset(struct policydb *pdb, struct role_set *rs, struct list *attr_list, char ***names, int *num_names) +static int process_roleset(struct policydb *pdb, struct role_set *rs, struct list *attr_list, char ***names, unsigned int *num_names) { int rc = 0; @@ -1049,7 +1049,7 @@ exit: return rc; } -static int process_typeset(struct policydb *pdb, struct type_set *ts, struct list *attr_list, char ***names, int *num_names) +static int process_typeset(struct policydb *pdb, struct type_set *ts, struct list *attr_list, char ***names, unsigned int *num_names) { int rc = 0; @@ -1072,7 +1072,7 @@ exit: return rc; } -static void names_destroy(char ***names, int *num_names) +static void names_destroy(char ***names, unsigned int *num_names) { free(*names); *names = NULL; @@ -1083,7 +1083,7 @@ static int roletype_role_in_ancestor_to_cil(struct policydb *pdb, struct stack * { struct list_node *curr; char **tnames = NULL; - int num_tnames, i; + unsigned int num_tnames, i; struct role_list_node *role_node = NULL; int rc; struct type_set *ts; @@ -1124,12 +1124,12 @@ exit: } -static int name_list_to_string(char **names, int num_names, char **string) +static int name_list_to_string(char **names, unsigned int num_names, char **string) { // create a space separated string of the names int rc = -1; size_t len = 0; - int i; + unsigned int i; char *str; char *strpos; @@ -1184,7 +1184,7 @@ static int avrule_list_to_cil(int indent, struct policydb *pdb, struct avrule *a struct avrule *avrule; char **snames = NULL; char **tnames = NULL; - int s, t, num_snames, num_tnames; + unsigned int s, t, num_snames, num_tnames; struct type_set *ts; for (avrule = avrule_list; avrule != NULL; avrule = avrule->next) { @@ -1257,7 +1257,7 @@ static int cond_expr_to_cil(int indent, struct policydb *pdb, struct cond_expr * char *new_val = NULL; char *val1 = NULL; char *val2 = NULL; - int num_params; + unsigned int num_params; const char *op; const char *fmt_str; const char *type; @@ -1432,11 +1432,11 @@ static int role_trans_to_cil(int indent, struct policydb *pdb, struct role_trans int rc = 0; struct role_trans_rule *rule; char **role_names = NULL; - int num_role_names = 0; - int role; + unsigned int num_role_names = 0; + unsigned int role; char **type_names = NULL; - int num_type_names = 0; - int type; + unsigned int num_type_names = 0; + unsigned int type; uint32_t i; struct ebitmap_node *node; struct type_set *ts; @@ -1482,10 +1482,10 @@ static int role_allows_to_cil(int indent, struct policydb *pdb, struct role_allo int rc = -1; struct role_allow_rule *rule; char **roles = NULL; - int num_roles = 0; + unsigned int num_roles = 0; char **new_roles = NULL; - int num_new_roles = 0; - int i,j; + unsigned int num_new_roles = 0; + unsigned int i, j; struct role_set *rs; for (rule = rules; rule != NULL; rule = rule->next) { @@ -1525,11 +1525,11 @@ static int range_trans_to_cil(int indent, struct policydb *pdb, struct range_tra int rc = -1; struct range_trans_rule *rule; char **stypes = NULL; - int num_stypes = 0; - int stype; + unsigned int num_stypes = 0; + unsigned int stype; char **ttypes = NULL; - int num_ttypes = 0; - int ttype; + unsigned int num_ttypes = 0; + unsigned int ttype; struct ebitmap_node *node; uint32_t i; struct type_set *ts; @@ -1594,11 +1594,11 @@ static int filename_trans_to_cil(int indent, struct policydb *pdb, struct filena { int rc = -1; char **stypes = NULL; - int num_stypes = 0; - int stype; + unsigned int num_stypes = 0; + unsigned int stype; char **ttypes = NULL; - int num_ttypes = 0; - int ttype; + unsigned int num_ttypes = 0; + unsigned int ttype; struct type_set *ts; struct filename_trans_rule *rule; @@ -1716,7 +1716,7 @@ static int constraint_expr_to_string(struct policydb *pdb, struct constraint_exp const char *attr2; char *names = NULL; char **name_list = NULL; - int num_names = 0; + unsigned int num_names = 0; struct type_set *ts; rc = stack_init(&stack); @@ -2090,9 +2090,9 @@ static int role_to_cil(int indent, struct policydb *pdb, struct avrule_block *UN int rc = -1; struct ebitmap_node *node; uint32_t i; - int j; + unsigned int j; char **types = NULL; - int num_types = 0; + unsigned int num_types = 0; struct role_datum *role = datum; struct type_set *ts; struct list *attr_list = NULL; -- 2.31.0
