xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net, sctp: convert sctp_auth_bytes.refcnt from atomic_t to refcount_t

Browse Source 
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>
This commit is contained in:
Reshetova, Elena
2017-07-04 15:53:24 +03:00
committed by David S. Miller
parent 55eabed60a
commit 6871584a5e
2 changed files with 5 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
net/sctp/auth.c
View File

@@ -63,7 +63,7 @@ void sctp_auth_key_put(struct sctp_auth_bytes *key)
if (!key)
return;
if (atomic_dec_and_test(&key->refcnt)) {
if (refcount_dec_and_test(&key->refcnt)) {
kzfree(key);
SCTP_DBG_OBJCNT_DEC(keys);
}
@@ -84,7 +84,7 @@ static struct sctp_auth_bytes *sctp_auth_create_key(__u32 key_len, gfp_t gfp)
return NULL;
key->len = key_len;
atomic_set(&key->refcnt, 1);
refcount_set(&key->refcnt, 1);
SCTP_DBG_OBJCNT_INC(keys);
return key;