fs: Pass argument to fcntl_setlease as int

The interface for fcntl expects the argument passed for the command
F_SETLEASE to be of type int. The current code wrongly treats it as
a long. In order to avoid access to undefined bits, we should explicitly
cast the argument to int.

Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Kevin Brodsky <Kevin.Brodsky@arm.com>
Cc: Vincenzo Frascino <Vincenzo.Frascino@arm.com>
Cc: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: David Laight <David.Laight@ACULAB.com>
Cc: Mark Rutland <Mark.Rutland@arm.com>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-cifs@vger.kernel.org
Cc: linux-nfs@vger.kernel.org
Cc: linux-morello@op-lists.linaro.org
Signed-off-by: Luca Vizzarro <Luca.Vizzarro@arm.com>
Message-Id: <20230414152459.816046-3-Luca.Vizzarro@arm.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/libfs.c b/fs/libfs.c
index 5b851315eeed03ba11e9f291fff215cf3ad779ca..0ea7fedb0b7a17b187bbb5ba46e716b9e6cec70c 100644 (file)
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1269,7 +1269,7 @@ EXPORT_SYMBOL(alloc_anon_inode);
  * All arguments are ignored and it just returns -EINVAL.
  */
 int
-simple_nosetlease(struct file *filp, long arg, struct file_lock **flp,
+simple_nosetlease(struct file *filp, int arg, struct file_lock **flp,
                  void **priv)
 {
        return -EINVAL;

diff --git a/fs/locks.c b/fs/locks.c
index df8b26a425248ac4aa87a4ef9772b9700b417209..265b5190db3ea4b1b7142fa2f70575982c1a0ce6 100644 (file)
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -438,7 +438,7 @@ static void flock_make_lock(struct file *filp, struct file_lock *fl, int type)
        fl->fl_end = OFFSET_MAX;
 }
 
-static int assign_type(struct file_lock *fl, long type)
+static int assign_type(struct file_lock *fl, int type)
 {
        switch (type) {
        case F_RDLCK:
@@ -549,7 +549,7 @@ static const struct lock_manager_operations lease_manager_ops = {
 /*
  * Initialize a lease, use the default lock manager operations
  */
-static int lease_init(struct file *filp, long type, struct file_lock *fl)
+static int lease_init(struct file *filp, int type, struct file_lock *fl)
 {
        if (assign_type(fl, type) != 0)
                return -EINVAL;
@@ -567,7 +567,7 @@ static int lease_init(struct file *filp, long type, struct file_lock *fl)
 }
 
 /* Allocate a file_lock initialised to this type of lease */
-static struct file_lock *lease_alloc(struct file *filp, long type)
+static struct file_lock *lease_alloc(struct file *filp, int type)
 {
        struct file_lock *fl = locks_alloc_lock();
        int error = -ENOMEM;
@@ -1666,7 +1666,7 @@ int fcntl_getlease(struct file *filp)
  * conflict with the lease we're trying to set.
  */
 static int
-check_conflicting_open(struct file *filp, const long arg, int flags)
+check_conflicting_open(struct file *filp, const int arg, int flags)
 {
        struct inode *inode = file_inode(filp);
        int self_wcount = 0, self_rcount = 0;
@@ -1701,7 +1701,7 @@ check_conflicting_open(struct file *filp, const long arg, int flags)
 }
 
 static int
-generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **priv)
+generic_add_lease(struct file *filp, int arg, struct file_lock **flp, void **priv)
 {
        struct file_lock *fl, *my_fl = NULL, *lease;
        struct inode *inode = file_inode(filp);
@@ -1859,7 +1859,7 @@ static int generic_delete_lease(struct file *filp, void *owner)
  *     The (input) flp->fl_lmops->lm_break function is required
  *     by break_lease().
  */
-int generic_setlease(struct file *filp, long arg, struct file_lock **flp,
+int generic_setlease(struct file *filp, int arg, struct file_lock **flp,
                        void **priv)
 {
        struct inode *inode = file_inode(filp);
@@ -1906,7 +1906,7 @@ lease_notifier_chain_init(void)
 }
 
 static inline void
-setlease_notifier(long arg, struct file_lock *lease)
+setlease_notifier(int arg, struct file_lock *lease)
 {
        if (arg != F_UNLCK)
                srcu_notifier_call_chain(&lease_notifier_chain, arg, lease);
@@ -1942,7 +1942,7 @@ EXPORT_SYMBOL_GPL(lease_unregister_notifier);
  * may be NULL if the lm_setup operation doesn't require it.
  */
 int
-vfs_setlease(struct file *filp, long arg, struct file_lock **lease, void **priv)
+vfs_setlease(struct file *filp, int arg, struct file_lock **lease, void **priv)
 {
        if (lease)
                setlease_notifier(arg, *lease);
@@ -1953,7 +1953,7 @@ vfs_setlease(struct file *filp, long arg, struct file_lock **lease, void **priv)
 }
 EXPORT_SYMBOL_GPL(vfs_setlease);
 
-static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg)
+static int do_fcntl_add_lease(unsigned int fd, struct file *filp, int arg)
 {
        struct file_lock *fl;
        struct fasync_struct *new;
@@ -1988,7 +1988,7 @@ static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg)
  *     Note that you also need to call %F_SETSIG to
  *     receive a signal when the lease is broken.
  */
-int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
+int fcntl_setlease(unsigned int fd, struct file *filp, int arg)
 {
        if (arg == F_UNLCK)
                return vfs_setlease(filp, F_UNLCK, NULL, (void **)&filp);

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 4c9f8bd866aba5dc6ca82a77a06eb107c1a5ff93..47c5c1f86d662290bbee8261c39e73195952f591 100644 (file)
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -328,7 +328,7 @@ extern int update_open_stateid(struct nfs4_state *state,
                                const nfs4_stateid *open_stateid,
                                const nfs4_stateid *deleg_stateid,
                                fmode_t fmode);
-extern int nfs4_proc_setlease(struct file *file, long arg,
+extern int nfs4_proc_setlease(struct file *file, int arg,
                              struct file_lock **lease, void **priv);
 extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
                struct nfs_fsinfo *fsinfo);

diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 4aeadd6e1a6dbbbe4a7511b6f03c4db703c83d5d..02788c3c85e5bb5c26dcd405ae081b5bb1fda947 100644 (file)
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -438,7 +438,7 @@ void nfs42_ssc_unregister_ops(void)
 }
 #endif /* CONFIG_NFS_V4_2 */
 
-static int nfs4_setlease(struct file *file, long arg, struct file_lock **lease,
+static int nfs4_setlease(struct file *file, int arg, struct file_lock **lease,
                         void **priv)
 {
        return nfs4_proc_setlease(file, arg, lease, priv);

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index e1a886b58354cf905018beb46beb89927dd6dbb3..b4593fbe0114c022b4eb8756653b40356ab8f5ee 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7573,7 +7573,7 @@ static int nfs4_delete_lease(struct file *file, void **priv)
        return generic_setlease(file, F_UNLCK, NULL, priv);
 }
 
-static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease,
+static int nfs4_add_lease(struct file *file, int arg, struct file_lock **lease,
                          void **priv)
 {
        struct inode *inode = file_inode(file);
@@ -7591,7 +7591,7 @@ static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease,
        return -EAGAIN;
 }
 
-int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease,
+int nfs4_proc_setlease(struct file *file, int arg, struct file_lock **lease,
                       void **priv)
 {
        switch (arg) {

diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c
index a4d8b0ea1c8cb311d5c1fea3a9fe8ff3788ead66..6fc8f43b1c9d5b6c881a0d413ee0214f1aaecfc8 100644 (file)
--- a/fs/smb/client/cifsfs.c
+++ b/fs/smb/client/cifsfs.c
@@ -1077,7 +1077,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
 }
 
 static int
-cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
+cifs_setlease(struct file *file, int arg, struct file_lock **lease, void **priv)
 {
        /*
         * Note that this is called by vfs setlease with i_lock held to

diff --git a/include/linux/filelock.h b/include/linux/filelock.h
index efcdd1631d9b60961b7956ec45195778e102a901..95e868e09e298bb70ca23ec760d1c00fdb07201e 100644 (file)
--- a/include/linux/filelock.h
+++ b/include/linux/filelock.h
@@ -144,7 +144,7 @@ int fcntl_setlk64(unsigned int, struct file *, unsigned int,
                        struct flock64 *);
 #endif
 
-int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
+int fcntl_setlease(unsigned int fd, struct file *filp, int arg);
 int fcntl_getlease(struct file *filp);
 
 /* fs/locks.c */
@@ -167,8 +167,8 @@ bool vfs_inode_has_locks(struct inode *inode);
 int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);
 int __break_lease(struct inode *inode, unsigned int flags, unsigned int type);
 void lease_get_mtime(struct inode *, struct timespec64 *time);
-int generic_setlease(struct file *, long, struct file_lock **, void **priv);
-int vfs_setlease(struct file *, long, struct file_lock **, void **);
+int generic_setlease(struct file *, int, struct file_lock **, void **priv);
+int vfs_setlease(struct file *, int, struct file_lock **, void **);
 int lease_modify(struct file_lock *, int, struct list_head *);
 
 struct notifier_block;
@@ -213,7 +213,7 @@ static inline int fcntl_setlk64(unsigned int fd, struct file *file,
        return -EACCES;
 }
 #endif
-static inline int fcntl_setlease(unsigned int fd, struct file *filp, long arg)
+static inline int fcntl_setlease(unsigned int fd, struct file *filp, int arg)
 {
        return -EINVAL;
 }
@@ -306,13 +306,13 @@ static inline void lease_get_mtime(struct inode *inode,
        return;
 }
 
-static inline int generic_setlease(struct file *filp, long arg,
+static inline int generic_setlease(struct file *filp, int arg,
                                    struct file_lock **flp, void **priv)
 {
        return -EINVAL;
 }
 
-static inline int vfs_setlease(struct file *filp, long arg,
+static inline int vfs_setlease(struct file *filp, int arg,
                               struct file_lock **lease, void **priv)
 {
        return -EINVAL;

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8e546433c781186c08511d95f528faefde70cc92..11055d00fab875bf6da7934541155e705ec00a41 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1799,7 +1799,7 @@ struct file_operations {
        ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
        ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
        void (*splice_eof)(struct file *file);
-       int (*setlease)(struct file *, long, struct file_lock **, void **);
+       int (*setlease)(struct file *, int, struct file_lock **, void **);
        long (*fallocate)(struct file *file, int mode, loff_t offset,
                          loff_t len);
        void (*show_fdinfo)(struct seq_file *m, struct file *f);
@@ -2950,7 +2950,7 @@ extern int simple_write_begin(struct file *file, struct address_space *mapping,
 extern const struct address_space_operations ram_aops;
 extern int always_delete_dentry(const struct dentry *);
 extern struct inode *alloc_anon_inode(struct super_block *);
-extern int simple_nosetlease(struct file *, long, struct file_lock **, void **);
+extern int simple_nosetlease(struct file *, int, struct file_lock **, void **);
 extern const struct dentry_operations simple_dentry_operations;
 
 extern struct dentry *simple_lookup(struct inode *, struct dentry *, unsigned int flags);