commit: f7285b5d631fd6096b11c6af0058ed3a2b30ef4e
From: "Serge E. Hallyn" <[email protected]>
Date: Thu, 26 May 2011 15:25:05 -0500
Subject: [PATCH] Set cred->user_ns in key_replace_session_keyring
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Since this cred was not created with copy_creds(), it needs to get
initialized. Otherwise use of syscall(__NR_keyctl, KEYCTL_SESSION_TO_PARENT);
can lead to a NULL deref. Thanks to Robert for finding this.
But introduced by commit 47a150edc2a ("Cache user_ns in struct cred").
Signed-off-by: Serge E. Hallyn <[email protected]>
Reported-by: Robert ÅwiÄcki <[email protected]>
Cc: David Howells <[email protected]>
Cc: [email protected] (2.6.39)
Signed-off-by: Linus Torvalds <[email protected]>
---
security/keys/process_keys.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 6c0480d..a3063eb 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -847,6 +847,7 @@ void key_replace_session_keyring(void)
new-> sgid = old-> sgid;
new->fsgid = old->fsgid;
new->user = get_uid(old->user);
+ new->user_ns = new->user->user_ns;
new->group_info = get_group_info(old->group_info);
new->securebits = old->securebits;
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