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fs: prevent use after free in auditing when symlink following was denied 

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>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Sasha Levin 2012-10-04 19:56:40 -04:00 committed by Al Viro
parent 547b1e81af
commit ffd8d101a3
1 changed files with 1 additions and 1 deletions
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2
fs/namei.c
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@ -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;
}