* [PATCH] fs: prevent use after free in auditing when symlink following was denied
@ 2012-10-04 23:56 Sasha Levin
2012-10-05 0:33 ` Kees Cook
2012-10-05 0:43 ` Al Viro
0 siblings, 2 replies; 3+ messages in thread
From: Sasha Levin @ 2012-10-04 23:56 UTC (permalink / raw)
To: viro, keescook
Cc: levinsasha928, davej, linux-fsdevel, linux-kernel, Sasha Levin
Commit "fs: add link restriction audit reporting" has added auditing of failed
attempts to follow symlinks. Unfortunately, the auditing was being done after
the struct path structure was released earlier.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
---
fs/namei.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/namei.c b/fs/namei.c
index aa30d19..6d47fac 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -692,9 +692,9 @@ static inline int may_follow_link(struct path *link, struct nameidata *nd)
if (uid_eq(parent->i_uid, inode->i_uid))
return 0;
+ audit_log_link_denied("follow_link", link);
path_put_conditional(link, nd);
path_put(&nd->path);
- audit_log_link_denied("follow_link", link);
return -EACCES;
}
--
1.7.12
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] fs: prevent use after free in auditing when symlink following was denied
2012-10-04 23:56 [PATCH] fs: prevent use after free in auditing when symlink following was denied Sasha Levin
@ 2012-10-05 0:33 ` Kees Cook
2012-10-05 0:43 ` Al Viro
1 sibling, 0 replies; 3+ messages in thread
From: Kees Cook @ 2012-10-05 0:33 UTC (permalink / raw)
To: Sasha Levin
Cc: viro, keescook, levinsasha928, davej, linux-fsdevel, linux-kernel
On Thu, Oct 04, 2012 at 07:56:40PM -0400, Sasha Levin wrote:
> Commit "fs: add link restriction audit reporting" has added auditing of failed
> attempts to follow symlinks. Unfortunately, the auditing was being done after
> the struct path structure was released earlier.
>
> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Thanks for catching that!
Cc: stable@vger.kernel.org
Acked-by: Kees Cook <keescook@chromium.org>
--
Kees Cook @outflux.net
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] fs: prevent use after free in auditing when symlink following was denied
2012-10-04 23:56 [PATCH] fs: prevent use after free in auditing when symlink following was denied Sasha Levin
2012-10-05 0:33 ` Kees Cook
@ 2012-10-05 0:43 ` Al Viro
1 sibling, 0 replies; 3+ messages in thread
From: Al Viro @ 2012-10-05 0:43 UTC (permalink / raw)
To: Sasha Levin; +Cc: keescook, levinsasha928, davej, linux-fsdevel, linux-kernel
On Thu, Oct 04, 2012 at 07:56:40PM -0400, Sasha Levin wrote:
> Commit "fs: add link restriction audit reporting" has added auditing of failed
> attempts to follow symlinks. Unfortunately, the auditing was being done after
> the struct path structure was released earlier.
Applied, and it's -stable fodder as well.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-10-05 0:43 UTC | newest]
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2012-10-05 0:33 ` Kees Cook
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