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authorReshetova, Elena <elena.reshetova@intel.com>2017-07-04 15:53:00 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-04 22:35:15 +0100
commite0542dd5185e68247b08c3418bdba14644b4c414 (patch)
tree1e887d070c0b3a07bff7a829bc7e78a929a49574 /net
parent66af846fe54b780f8f5bd9a62aee081bd2ace582 (diff)
downloadlinux-e0542dd5185e68247b08c3418bdba14644b4c414.tar.bz2
net, decnet: convert dn_fib_info.fib_clntref 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/decnet/dn_fib.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/decnet/dn_fib.c b/net/decnet/dn_fib.c
index f9058ebeb635..f9f6fb3f3c5b 100644
--- a/net/decnet/dn_fib.c
+++ b/net/decnet/dn_fib.c
@@ -389,7 +389,7 @@ link_it:
}
fi->fib_treeref++;
- atomic_inc(&fi->fib_clntref);
+ refcount_set(&fi->fib_clntref, 1);
spin_lock(&dn_fib_info_lock);
fi->fib_next = dn_fib_info_list;
fi->fib_prev = NULL;
@@ -425,7 +425,7 @@ int dn_fib_semantic_match(int type, struct dn_fib_info *fi, const struct flowidn
switch (type) {
case RTN_NAT:
DN_FIB_RES_RESET(*res);
- atomic_inc(&fi->fib_clntref);
+ refcount_inc(&fi->fib_clntref);
return 0;
case RTN_UNICAST:
case RTN_LOCAL:
@@ -438,7 +438,7 @@ int dn_fib_semantic_match(int type, struct dn_fib_info *fi, const struct flowidn
}
if (nhsel < fi->fib_nhs) {
res->nh_sel = nhsel;
- atomic_inc(&fi->fib_clntref);
+ refcount_inc(&fi->fib_clntref);
return 0;
}
endfor_nexthops(fi);