Piteball
/
android_kernel_samsung_msm8226
mirror of https://github.com/S3NEO/android_kernel_samsung_msm8226.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

af_unix: Add sockaddr length checks before accessing sa_family in bind and connect handlers 

Verify that the caller-provided sockaddr structure is large enough to
contain the sa_family field, before accessing it in bind() and connect()
handlers of the AF_UNIX socket. Since neither syscall enforces a minimum
size of the corresponding memory region, very short sockaddrs (zero or
one byte long) result in operating on uninitialized memory while
referencing .sa_family.

Change-Id: Ifa18852cf4380eac682bd3a533abf6a512b5ec47
Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
This commit is contained in:
Mateusz Jurczyk 2017-06-08 11:13:36 +02:00 committed by Francescodario Cuzzocrea
parent 47644ea6cf
commit 056e93f83e
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
net/unix/af_unix.c
View File

@ -950,7 +950,8 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
struct hlist_head *list;
err = -EINVAL;
if (sunaddr->sun_family != AF_UNIX)
if (addr_len < offsetofend(struct sockaddr_un, sun_family) ||
sunaddr->sun_family != AF_UNIX)
goto out;
if (addr_len == sizeof(short)) {
@ -1090,6 +1091,10 @@ static int unix_dgram_connect(struct socket *sock, struct sockaddr *addr,
unsigned hash;
int err;
err = -EINVAL;
if (alen < offsetofend(struct sockaddr, sa_family))
goto out;
if (addr->sa_family != AF_UNSPEC) {
err = unix_mkname(sunaddr, alen, &hash);
if (err < 0)