| Message ID | 20241022090314.173002-1-vmojzis@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [1/4] libsepol/cil: Initialize avtab_datum on declaration | expand |
On Tue, Oct 22, 2024 at 5:09 AM Vit Mojzis <vmojzis@redhat.com> wrote: > > avtab_datum.xperms was not always initialized before being used. > > Fixes: > Error: UNINIT (CWE-457): > libsepol-3.7/cil/src/cil_binary.c:977:2: var_decl: Declaring variable "avtab_datum" without initializer. > libsepol-3.7/cil/src/cil_binary.c:1059:3: uninit_use_in_call: Using uninitialized value "avtab_datum". Field "avtab_datum.xperms" is uninitialized when calling "__cil_cond_insert_rule". > \# 1057| } > \# 1058| } > \# 1059|-> rc = __cil_cond_insert_rule(&pdb->te_cond_avtab, &avtab_key, &avtab_datum, cond_node, cond_flavor); > \# 1060| } > > Error: UNINIT (CWE-457): > libsepol-3.7/cil/src/cil_binary.c:1348:2: var_decl: Declaring variable "avtab_datum" without initializer. > libsepol-3.7/cil/src/cil_binary.c:1384:3: uninit_use_in_call: Using uninitialized value "avtab_datum". Field "avtab_datum.xperms" is uninitialized when calling "__cil_cond_insert_rule". > \# 1382| } else { > \# 1383| avtab_datum.data = data; > \# 1384|-> rc = __cil_cond_insert_rule(&pdb->te_cond_avtab, &avtab_key, &avtab_datum, cond_node, cond_flavor); > \# 1385| } > \# 1386| > > Signed-off-by: Vit Mojzis <vmojzis@redhat.com> > --- > libsepol/cil/src/cil_binary.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/libsepol/cil/src/cil_binary.c b/libsepol/cil/src/cil_binary.c > index 3dec1883..eb6120d9 100644 > --- a/libsepol/cil/src/cil_binary.c > +++ b/libsepol/cil/src/cil_binary.c > @@ -975,7 +975,7 @@ static int __cil_insert_type_rule(policydb_t *pdb, uint32_t kind, uint32_t src, > { > int rc = SEPOL_OK; > avtab_key_t avtab_key; > - avtab_datum_t avtab_datum; > + avtab_datum_t avtab_datum = { .data = res, .xperms = NULL }; Since we are initializing it here, there is no need for the assignment on line 1000. > avtab_ptr_t existing; > > avtab_key.source_type = src; > @@ -1346,7 +1346,7 @@ static int __cil_insert_avrule(policydb_t *pdb, uint32_t kind, uint32_t src, uin > { > int rc = SEPOL_OK; > avtab_key_t avtab_key; > - avtab_datum_t avtab_datum; > + avtab_datum_t avtab_datum = { .xperms = NULL }; > avtab_datum_t *avtab_dup = NULL; > I think it would be clearer to just do " = { .data = data, .xperms = NULL };" and eliminate the assignments on lines 1375 and 1384. Thanks, Jim > avtab_key.source_type = src; > -- > 2.47.0 > >
diff --git a/libsepol/cil/src/cil_binary.c b/libsepol/cil/src/cil_binary.c index 3dec1883..eb6120d9 100644 --- a/libsepol/cil/src/cil_binary.c +++ b/libsepol/cil/src/cil_binary.c @@ -975,7 +975,7 @@ static int __cil_insert_type_rule(policydb_t *pdb, uint32_t kind, uint32_t src, { int rc = SEPOL_OK; avtab_key_t avtab_key; - avtab_datum_t avtab_datum; + avtab_datum_t avtab_datum = { .data = res, .xperms = NULL }; avtab_ptr_t existing; avtab_key.source_type = src; @@ -1346,7 +1346,7 @@ static int __cil_insert_avrule(policydb_t *pdb, uint32_t kind, uint32_t src, uin { int rc = SEPOL_OK; avtab_key_t avtab_key; - avtab_datum_t avtab_datum; + avtab_datum_t avtab_datum = { .xperms = NULL }; avtab_datum_t *avtab_dup = NULL; avtab_key.source_type = src;
avtab_datum.xperms was not always initialized before being used. Fixes: Error: UNINIT (CWE-457): libsepol-3.7/cil/src/cil_binary.c:977:2: var_decl: Declaring variable "avtab_datum" without initializer. libsepol-3.7/cil/src/cil_binary.c:1059:3: uninit_use_in_call: Using uninitialized value "avtab_datum". Field "avtab_datum.xperms" is uninitialized when calling "__cil_cond_insert_rule". \# 1057| } \# 1058| } \# 1059|-> rc = __cil_cond_insert_rule(&pdb->te_cond_avtab, &avtab_key, &avtab_datum, cond_node, cond_flavor); \# 1060| } Error: UNINIT (CWE-457): libsepol-3.7/cil/src/cil_binary.c:1348:2: var_decl: Declaring variable "avtab_datum" without initializer. libsepol-3.7/cil/src/cil_binary.c:1384:3: uninit_use_in_call: Using uninitialized value "avtab_datum". Field "avtab_datum.xperms" is uninitialized when calling "__cil_cond_insert_rule". \# 1382| } else { \# 1383| avtab_datum.data = data; \# 1384|-> rc = __cil_cond_insert_rule(&pdb->te_cond_avtab, &avtab_key, &avtab_datum, cond_node, cond_flavor); \# 1385| } \# 1386| Signed-off-by: Vit Mojzis <vmojzis@redhat.com> --- libsepol/cil/src/cil_binary.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)