diff options
| author | Kees Cook <keescook@chromium.org> | 2019-10-02 16:41:58 -0700 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2019-10-03 13:59:29 -0400 |
| commit | 245d73698ed7abdc7e520dfa38048bb80ce89571 (patch) | |
| tree | fb75f332d9a6efdb29749b6c66b28bafa86f33b2 /fs/namei.c | |
| parent | 54ecb8f7028c5eb3d740bb82b0f1d90f2df63c5c (diff) | |
| download | lwn-245d73698ed7abdc7e520dfa38048bb80ce89571.tar.gz lwn-245d73698ed7abdc7e520dfa38048bb80ce89571.zip | |
audit: Report suspicious O_CREAT usage
This renames the very specific audit_log_link_denied() to
audit_log_path_denied() and adds the AUDIT_* type as an argument. This
allows for the creation of the new AUDIT_ANOM_CREAT that can be used to
report the fifo/regular file creation restrictions that were introduced
in commit 30aba6656f61 ("namei: allow restricted O_CREAT of FIFOs and
regular files").
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/namei.c b/fs/namei.c index 671c3c1a3425..2dda552bcf7a 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -925,7 +925,7 @@ static inline int may_follow_link(struct nameidata *nd) return -ECHILD; audit_inode(nd->name, nd->stack[0].link.dentry, 0); - audit_log_link_denied("follow_link"); + audit_log_path_denied(AUDIT_ANOM_LINK, "follow_link"); return -EACCES; } @@ -993,7 +993,7 @@ static int may_linkat(struct path *link) if (safe_hardlink_source(inode) || inode_owner_or_capable(inode)) return 0; - audit_log_link_denied("linkat"); + audit_log_path_denied(AUDIT_ANOM_LINK, "linkat"); return -EPERM; } @@ -1031,6 +1031,10 @@ static int may_create_in_sticky(struct dentry * const dir, (dir->d_inode->i_mode & 0020 && ((sysctl_protected_fifos >= 2 && S_ISFIFO(inode->i_mode)) || (sysctl_protected_regular >= 2 && S_ISREG(inode->i_mode))))) { + const char *operation = S_ISFIFO(inode->i_mode) ? + "sticky_create_fifo" : + "sticky_create_regular"; + audit_log_path_denied(AUDIT_ANOM_CREAT, operation); return -EACCES; } return 0; |