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authorLinus Torvalds <torvalds@linux-foundation.org>2013-04-19 15:32:32 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-01 09:41:16 -0700
commitca4bf7c6970aee586c4b6b642e011e3847ac5f93 (patch)
tree5a09c1404e30b8647502300f19516bc6720df17a /include
parent4087320fd8d0164c4b53fe5f9c26c0d3eaba7d2d (diff)
net: fix incorrect credentials passing
[ Upstream commit 83f1b4ba917db5dc5a061a44b3403ddb6e783494 ] Commit 257b5358b32f ("scm: Capture the full credentials of the scm sender") changed the credentials passing code to pass in the effective uid/gid instead of the real uid/gid. Obviously this doesn't matter most of the time (since normally they are the same), but it results in differences for suid binaries when the wrong uid/gid ends up being used. This just undoes that (presumably unintentional) part of the commit. Reported-by: Andy Lutomirski <luto@amacapital.net> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Serge E. Hallyn <serge@hallyn.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/socket.h3
-rw-r--r--include/net/scm.h2
2 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h
index b84bbd48b874..8f15b1d0031e 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -316,7 +316,8 @@ struct ucred {
/* IPX options */
#define IPX_TYPE 1
-extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred);
+extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred,
+ bool use_effective);
extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov,
diff --git a/include/net/scm.h b/include/net/scm.h
index 0c0017ce23bb..9f211cff93bc 100644
--- a/include/net/scm.h
+++ b/include/net/scm.h
@@ -50,7 +50,7 @@ static __inline__ void scm_set_cred(struct scm_cookie *scm,
{
scm->pid = get_pid(pid);
scm->cred = cred ? get_cred(cred) : NULL;
- cred_to_ucred(pid, cred, &scm->creds);
+ cred_to_ucred(pid, cred, &scm->creds, false);
}
static __inline__ void scm_destroy_cred(struct scm_cookie *scm)