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authorJan Kara <jack@suse.cz>2015-05-21 16:05:53 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2015-06-23 18:01:08 -0400
commit5fa8e0a1c6a762857ae67d1628c58b9a02362003 (patch)
tree53072ae36f38d4b3c1c56defff4b98acb274c077
parent2426f3910069ed47c0cc58559a6d088af7920201 (diff)
downloadop-kernel-dev-5fa8e0a1c6a762857ae67d1628c58b9a02362003.zip
op-kernel-dev-5fa8e0a1c6a762857ae67d1628c58b9a02362003.tar.gz
fs: Rename file_remove_suid() to file_remove_privs()
file_remove_suid() is a misnomer since it removes also file capabilities stored in xattrs and sets S_NOSEC flag. Also should_remove_suid() tells something else than whether file_remove_suid() call is necessary which leads to bugs. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/btrfs/file.c2
-rw-r--r--fs/ceph/file.c2
-rw-r--r--fs/fuse/file.c2
-rw-r--r--fs/inode.c13
-rw-r--r--fs/ntfs/file.c2
-rw-r--r--fs/xfs/xfs_file.c2
-rw-r--r--include/linux/fs.h2
-rw-r--r--mm/filemap.c2
8 files changed, 15 insertions, 12 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index b072e17..86f9728 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1748,7 +1748,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
}
current->backing_dev_info = inode_to_bdi(inode);
- err = file_remove_suid(file);
+ err = file_remove_privs(file);
if (err) {
mutex_unlock(&inode->i_mutex);
goto out;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 3b6b522..e55fe32 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -959,7 +959,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
pos = iocb->ki_pos;
count = iov_iter_count(from);
- err = file_remove_suid(file);
+ err = file_remove_privs(file);
if (err)
goto out;
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 5ef05b5..1344647 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1169,7 +1169,7 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (err <= 0)
goto out;
- err = file_remove_suid(file);
+ err = file_remove_privs(file);
if (err)
goto out;
diff --git a/fs/inode.c b/fs/inode.c
index 07f4cb5..849210c 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1685,7 +1685,11 @@ static int __remove_suid(struct dentry *dentry, int kill)
return notify_change(dentry, &newattrs, NULL);
}
-int file_remove_suid(struct file *file)
+/*
+ * Remove special file priviledges (suid, capabilities) when file is written
+ * to or truncated.
+ */
+int file_remove_privs(struct file *file)
{
struct dentry *dentry = file->f_path.dentry;
struct inode *inode = d_inode(dentry);
@@ -1711,7 +1715,7 @@ int file_remove_suid(struct file *file)
return error;
}
-EXPORT_SYMBOL(file_remove_suid);
+EXPORT_SYMBOL(file_remove_privs);
/**
* file_update_time - update mtime and ctime time
@@ -1966,9 +1970,8 @@ EXPORT_SYMBOL(inode_dio_wait);
* inode is being instantiated). The reason for the cmpxchg() loop
* --- which wouldn't be necessary if all code paths which modify
* i_flags actually followed this rule, is that there is at least one
- * code path which doesn't today --- for example,
- * __generic_file_aio_write() calls file_remove_suid() without holding
- * i_mutex --- so we use cmpxchg() out of an abundance of caution.
+ * code path which doesn't today so we use cmpxchg() out of an abundance
+ * of caution.
*
* In the long run, i_mutex is overkill, and we should probably look
* at using the i_lock spinlock to protect i_flags, and then make sure
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 7bb487e..182bb93 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -382,7 +382,7 @@ static ssize_t ntfs_prepare_file_for_write(struct kiocb *iocb,
base_ni = ni;
if (NInoAttr(ni))
base_ni = ni->ext.base_ntfs_ino;
- err = file_remove_suid(file);
+ err = file_remove_privs(file);
if (unlikely(err))
goto out;
/*
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 8121e75..f3e4fbb 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -623,7 +623,7 @@ restart:
* setgid bits if the process is not being run by root. This keeps
* people from modifying setuid and setgid binaries.
*/
- return file_remove_suid(file);
+ return file_remove_privs(file);
}
/*
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2c135ad..641e68d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2553,7 +2553,7 @@ extern struct inode *new_inode_pseudo(struct super_block *sb);
extern struct inode *new_inode(struct super_block *sb);
extern void free_inode_nonrcu(struct inode *inode);
extern int should_remove_suid(struct dentry *);
-extern int file_remove_suid(struct file *);
+extern int file_remove_privs(struct file *);
extern void __insert_inode_hash(struct inode *, unsigned long hashval);
static inline void insert_inode_hash(struct inode *inode)
diff --git a/mm/filemap.c b/mm/filemap.c
index 6bf5e42..f851e36 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2536,7 +2536,7 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
/* We can write back this queue in page reclaim */
current->backing_dev_info = inode_to_bdi(inode);
- err = file_remove_suid(file);
+ err = file_remove_privs(file);
if (err)
goto out;
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