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authorReshetova, Elena <elena.reshetova@intel.com>2017-07-04 15:53:06 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-04 22:35:16 +0100
commitedcd9270be1ba9c80cd0789ffbae7a7d204b7b05 (patch)
tree6c8ff63ac23d3a2c7a7f08b34d4404b1bfe5b88a /net
parent2512775985969a3dadb09670701f0c16499ee784 (diff)
downloadlinux-edcd9270be1ba9c80cd0789ffbae7a7d204b7b05.tar.bz2
net, calipso: convert calipso_doi.refcount from atomic_t to refcount_t
refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/calipso.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/net/ipv6/calipso.c b/net/ipv6/calipso.c
index 44067521e7cd..1323b9679cf7 100644
--- a/net/ipv6/calipso.c
+++ b/net/ipv6/calipso.c
@@ -338,7 +338,7 @@ static struct calipso_doi *calipso_doi_search(u32 doi)
struct calipso_doi *iter;
list_for_each_entry_rcu(iter, &calipso_doi_list, list)
- if (iter->doi == doi && atomic_read(&iter->refcount))
+ if (iter->doi == doi && refcount_read(&iter->refcount))
return iter;
return NULL;
}
@@ -370,7 +370,7 @@ static int calipso_doi_add(struct calipso_doi *doi_def,
if (doi_def->doi == CALIPSO_DOI_UNKNOWN)
goto doi_add_return;
- atomic_set(&doi_def->refcount, 1);
+ refcount_set(&doi_def->refcount, 1);
spin_lock(&calipso_doi_list_lock);
if (calipso_doi_search(doi_def->doi)) {
@@ -458,7 +458,7 @@ static int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info)
ret_val = -ENOENT;
goto doi_remove_return;
}
- if (!atomic_dec_and_test(&doi_def->refcount)) {
+ if (!refcount_dec_and_test(&doi_def->refcount)) {
spin_unlock(&calipso_doi_list_lock);
ret_val = -EBUSY;
goto doi_remove_return;
@@ -499,7 +499,7 @@ static struct calipso_doi *calipso_doi_getdef(u32 doi)
doi_def = calipso_doi_search(doi);
if (!doi_def)
goto doi_getdef_return;
- if (!atomic_inc_not_zero(&doi_def->refcount))
+ if (!refcount_inc_not_zero(&doi_def->refcount))
doi_def = NULL;
doi_getdef_return:
@@ -520,7 +520,7 @@ static void calipso_doi_putdef(struct calipso_doi *doi_def)
if (!doi_def)
return;
- if (!atomic_dec_and_test(&doi_def->refcount))
+ if (!refcount_dec_and_test(&doi_def->refcount))
return;
spin_lock(&calipso_doi_list_lock);
list_del_rcu(&doi_def->list);
@@ -553,7 +553,7 @@ static int calipso_doi_walk(u32 *skip_cnt,
rcu_read_lock();
list_for_each_entry_rcu(iter_doi, &calipso_doi_list, list)
- if (atomic_read(&iter_doi->refcount) > 0) {
+ if (refcount_read(&iter_doi->refcount) > 0) {
if (doi_cnt++ < *skip_cnt)
continue;
ret_val = callback(iter_doi, cb_arg);