| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20260108074201.435280-7-viro@zeniv.linux.org.uk>
Date: Thu, 8 Jan 2026 07:41:59 +0000
From: Al Viro <viro@...iv.linux.org.uk>
To: linux-fsdevel@...r.kernel.org
Cc: torvalds@...ux-foundation.org,
brauner@...nel.org,
jack@...e.cz,
mjguzik@...il.com,
paul@...l-moore.com,
axboe@...nel.dk,
audit@...r.kernel.org,
io-uring@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [RFC PATCH 6/8] non-consuming variants of do_{unlinkat,rmdir}()
similar to previous commit; replacements are filename_{unlinkat,rmdir}()
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
Documentation/filesystems/porting.rst | 6 +++---
fs/coredump.c | 3 ++-
fs/init.c | 6 ++++--
fs/internal.h | 4 ++--
fs/namei.c | 17 +++++++++--------
io_uring/fs.c | 5 +++--
6 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst
index 7e68a148dd1e..2b4dddfe6c66 100644
--- a/Documentation/filesystems/porting.rst
+++ b/Documentation/filesystems/porting.rst
@@ -1339,6 +1339,6 @@ in-tree filesystems have done).
**mandatory**
-do_{mkdir,mknod,link,symlink,renameat2}() are gone; filename_...()
-counterparts replace those. The difference is that the former used
-to consume filename references; the latter do not.
+do_{mkdir,mknod,link,symlink,renameat2,rmdir,unlink}() are gone; filename_...()
+counterparts replace those. The difference is that the former used to consume
+filename references; the latter do not.
diff --git a/fs/coredump.c b/fs/coredump.c
index 8feb9c1cf83d..d9597610a6ca 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -895,11 +895,12 @@ static bool coredump_file(struct core_name *cn, struct coredump_params *cprm,
* privs and don't want to unlink another user's coredump.
*/
if (!coredump_force_suid_safe(cprm)) {
+ CLASS(filename_kernel, name)(cn->corename);
/*
* If it doesn't exist, that's fine. If there's some
* other problem, we'll catch it at the filp_open().
*/
- do_unlinkat(AT_FDCWD, getname_kernel(cn->corename));
+ filename_unlinkat(AT_FDCWD, name);
}
/*
diff --git a/fs/init.c b/fs/init.c
index 543444c1d79e..ea528b020cd1 100644
--- a/fs/init.c
+++ b/fs/init.c
@@ -160,7 +160,8 @@ int __init init_symlink(const char *oldname, const char *newname)
int __init init_unlink(const char *pathname)
{
- return do_unlinkat(AT_FDCWD, getname_kernel(pathname));
+ CLASS(filename_kernel, name)(pathname);
+ return filename_unlinkat(AT_FDCWD, name);
}
int __init init_mkdir(const char *pathname, umode_t mode)
@@ -171,7 +172,8 @@ int __init init_mkdir(const char *pathname, umode_t mode)
int __init init_rmdir(const char *pathname)
{
- return do_rmdir(AT_FDCWD, getname_kernel(pathname));
+ CLASS(filename_kernel, name)(pathname);
+ return filename_rmdir(AT_FDCWD, name);
}
int __init init_utimes(char *filename, struct timespec64 *ts)
diff --git a/fs/internal.h b/fs/internal.h
index 02b5dec13ff3..4821f8b8fdda 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -54,8 +54,8 @@ extern int finish_clean_context(struct fs_context *fc);
*/
extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
struct path *path, const struct path *root);
-int do_rmdir(int dfd, struct filename *name);
-int do_unlinkat(int dfd, struct filename *name);
+int filename_rmdir(int dfd, struct filename *name);
+int filename_unlinkat(int dfd, struct filename *name);
int may_linkat(struct mnt_idmap *idmap, const struct path *link);
int filename_renameat2(int olddfd, struct filename *oldname, int newdfd,
struct filename *newname, unsigned int flags);
diff --git a/fs/namei.c b/fs/namei.c
index 1aa19dde50e4..42b33bb0f892 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -5278,9 +5278,8 @@ int vfs_rmdir(struct mnt_idmap *idmap, struct inode *dir,
}
EXPORT_SYMBOL(vfs_rmdir);
-int do_rmdir(int dfd, struct filename *__name)
+int filename_rmdir(int dfd, struct filename *name)
{
- CLASS(filename_consume, name)(__name);
int error;
struct dentry *dentry;
struct path path;
@@ -5338,7 +5337,8 @@ int do_rmdir(int dfd, struct filename *__name)
SYSCALL_DEFINE1(rmdir, const char __user *, pathname)
{
- return do_rmdir(AT_FDCWD, getname(pathname));
+ CLASS(filename, name)(pathname);
+ return filename_rmdir(AT_FDCWD, name);
}
/**
@@ -5420,9 +5420,8 @@ EXPORT_SYMBOL(vfs_unlink);
* writeout happening, and we don't want to prevent access to the directory
* while waiting on the I/O.
*/
-int do_unlinkat(int dfd, struct filename *__name)
+int filename_unlinkat(int dfd, struct filename *name)
{
- CLASS(filename_consume, name)(__name);
int error;
struct dentry *dentry;
struct path path;
@@ -5489,14 +5488,16 @@ SYSCALL_DEFINE3(unlinkat, int, dfd, const char __user *, pathname, int, flag)
if ((flag & ~AT_REMOVEDIR) != 0)
return -EINVAL;
+ CLASS(filename, name)(pathname);
if (flag & AT_REMOVEDIR)
- return do_rmdir(dfd, getname(pathname));
- return do_unlinkat(dfd, getname(pathname));
+ return filename_rmdir(dfd, name);
+ return filename_unlinkat(dfd, name);
}
SYSCALL_DEFINE1(unlink, const char __user *, pathname)
{
- return do_unlinkat(AT_FDCWD, getname(pathname));
+ CLASS(filename, name)(pathname);
+ return filename_unlinkat(AT_FDCWD, name);
}
/**
diff --git a/io_uring/fs.c b/io_uring/fs.c
index 40541b539e0d..d0580c754bf8 100644
--- a/io_uring/fs.c
+++ b/io_uring/fs.c
@@ -134,14 +134,15 @@ int io_unlinkat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
int io_unlinkat(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_unlink *un = io_kiocb_to_cmd(req, struct io_unlink);
+ CLASS(filename_complete_delayed, name)(&un->filename);
int ret;
WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
if (un->flags & AT_REMOVEDIR)
- ret = do_rmdir(un->dfd, complete_getname(&un->filename));
+ ret = filename_rmdir(un->dfd, name);
else
- ret = do_unlinkat(un->dfd, complete_getname(&un->filename));
+ ret = filename_unlinkat(un->dfd, name);
req->flags &= ~REQ_F_NEED_CLEANUP;
io_req_set_res(req, ret, 0);
--
2.47.3
Powered by blists - more mailing lists