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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2019-04-12 19:59:36 +0900
committerJames Morris <jamorris@linux.microsoft.com>2019-05-10 14:58:25 -0700
commite6193f78bb689f3f424559bb45f4a091c8b314df (patch)
tree8c51acf92c910b500cd4622df6e11b949de7118b /security/tomoyo
parente80b18599a39a625bc8b2e39ba3004a62f78805a (diff)
downloadlinux-e6193f78bb689f3f424559bb45f4a091c8b314df.tar.bz2
tomoyo: Check address length before reading address family
KMSAN will complain if valid address length passed to bind()/connect()/ sendmsg() is shorter than sizeof("struct sockaddr"->sa_family) bytes. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jamorris@linux.microsoft.com>
Diffstat (limited to 'security/tomoyo')
-rw-r--r--security/tomoyo/network.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/security/tomoyo/network.c b/security/tomoyo/network.c
index 9094f4b3b367..f9ff121d7e1e 100644
--- a/security/tomoyo/network.c
+++ b/security/tomoyo/network.c
@@ -505,6 +505,8 @@ static int tomoyo_check_inet_address(const struct sockaddr *addr,
{
struct tomoyo_inet_addr_info *i = &address->inet;
+ if (addr_len < offsetofend(struct sockaddr, sa_family))
+ return 0;
switch (addr->sa_family) {
case AF_INET6:
if (addr_len < SIN6_LEN_RFC2133)
@@ -594,6 +596,8 @@ static int tomoyo_check_unix_address(struct sockaddr *addr,
{
struct tomoyo_unix_addr_info *u = &address->unix0;
+ if (addr_len < offsetofend(struct sockaddr, sa_family))
+ return 0;
if (addr->sa_family != AF_UNIX)
return 0;
u->addr = ((struct sockaddr_un *) addr)->sun_path;