Commit 055f2130 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'vfs-6.17-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs 

Pull vfs fixes from Christian Brauner:

 - Fix two memory leaks in pidfs

 - Prevent changing the idmapping of an already idmapped mount without
   OPEN_TREE_CLONE through open_tree_attr()

 - Don't fail listing extended attributes in kernfs when no extended
   attributes are set

 - Fix the return value in coredump_parse()

 - Fix the error handling for unbuffered writes in netfs

 - Fix broken data integrity guarantees for O_SYNC writes via iomap

 - Fix UAF in __mark_inode_dirty()

 - Keep inode->i_blkbits constant in fuse

 - Fix coredump selftests

 - Fix get_unused_fd_flags() usage in do_handle_open()

 - Rename EXPORT_SYMBOL_GPL_FOR_MODULES to EXPORT_SYMBOL_FOR_MODULES

 - Fix use-after-free in bh_read()

 - Fix incorrect lflags value in the move_mount() syscall

* tag 'vfs-6.17-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  signal: Fix memory leak for PIDFD_SELF* sentinels
  kernfs: don't fail listing extended attributes
  coredump: Fix return value in coredump_parse()
  fs/buffer: fix use-after-free when call bh_read() helper
  pidfs: Fix memory leak in pidfd_info()
  netfs: Fix unbuffered write error handling
  fhandle: do_handle_open() should get FD with user flags
  module: Rename EXPORT_SYMBOL_GPL_FOR_MODULES to EXPORT_SYMBOL_FOR_MODULES
  fs: fix incorrect lflags value in the move_mount syscall
  selftests/coredump: Remove the read() that fails the test
  fuse: keep inode->i_blkbits constant
  iomap: Fix broken data integrity guarantees for O_SYNC writes
  selftests/mount_setattr: add smoke tests for open_tree_attr(2) bug
  open_tree_attr: do not allow id-mapping changes without OPEN_TREE_CLONE
  fs: writeback: fix use-after-free in __mark_inode_dirty()
parents be48bcf0 a2c1f826

Documentation/core-api/symbol-namespaces.rst

+6 −5
Original line number Diff line number Diff line
@@ -76,20 +76,21 @@ unit as preprocessor statement. The above example would then read:: 
within the corresponding compilation unit before the #include for

<linux/export.h>. Typically it's placed before the first #include statement.



Using the EXPORT_SYMBOL_GPL_FOR_MODULES() macro

-----------------------------------------------

Using the EXPORT_SYMBOL_FOR_MODULES() macro

-------------------------------------------



Symbols exported using this macro are put into a module namespace. This

namespace cannot be imported.

namespace cannot be imported. These exports are GPL-only as they are only

intended for in-tree modules.



The macro takes a comma separated list of module names, allowing only those

modules to access this symbol. Simple tail-globs are supported.



For example::



  EXPORT_SYMBOL_GPL_FOR_MODULES(preempt_notifier_inc, "kvm,kvm-*")

  EXPORT_SYMBOL_FOR_MODULES(preempt_notifier_inc, "kvm,kvm-*")



will limit usage of this symbol to modules whoes name matches the given

will limit usage of this symbol to modules whose name matches the given

patterns.



How to use Symbols exported in Namespaces

drivers/tty/serial/8250/8250_rsa.c

+4 −4
Original line number Diff line number Diff line
@@ -147,7 +147,7 @@ void rsa_enable(struct uart_8250_port *up) 
	if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16)

		serial_out(up, UART_RSA_FRR, 0);

}

EXPORT_SYMBOL_GPL_FOR_MODULES(rsa_enable, "8250_base");

EXPORT_SYMBOL_FOR_MODULES(rsa_enable, "8250_base");



/*

 * Attempts to turn off the RSA FIFO and resets the RSA board back to 115kbps compat mode. It is
@@ -179,7 +179,7 @@ void rsa_disable(struct uart_8250_port *up) 
		up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16;

	uart_port_unlock_irq(&up->port);

}

EXPORT_SYMBOL_GPL_FOR_MODULES(rsa_disable, "8250_base");

EXPORT_SYMBOL_FOR_MODULES(rsa_disable, "8250_base");



void rsa_autoconfig(struct uart_8250_port *up)

{
@@ -192,7 +192,7 @@ void rsa_autoconfig(struct uart_8250_port *up) 
	if (__rsa_enable(up))

		up->port.type = PORT_RSA;

}

EXPORT_SYMBOL_GPL_FOR_MODULES(rsa_autoconfig, "8250_base");

EXPORT_SYMBOL_FOR_MODULES(rsa_autoconfig, "8250_base");



void rsa_reset(struct uart_8250_port *up)

{
@@ -201,7 +201,7 @@ void rsa_reset(struct uart_8250_port *up) 


	serial_out(up, UART_RSA_FRR, 0);

}

EXPORT_SYMBOL_GPL_FOR_MODULES(rsa_reset, "8250_base");

EXPORT_SYMBOL_FOR_MODULES(rsa_reset, "8250_base");



#ifdef CONFIG_SERIAL_8250_DEPRECATED_OPTIONS

#ifndef MODULE

fs/anon_inodes.c

+1 −1
Original line number Diff line number Diff line
@@ -129,7 +129,7 @@ struct inode *anon_inode_make_secure_inode(struct super_block *sb, const char *n 
	}

	return inode;

}

EXPORT_SYMBOL_GPL_FOR_MODULES(anon_inode_make_secure_inode, "kvm");

EXPORT_SYMBOL_FOR_MODULES(anon_inode_make_secure_inode, "kvm");



static struct file *__anon_inode_getfile(const char *name,

					 const struct file_operations *fops,

fs/buffer.c

+1 −1
Original line number Diff line number Diff line
@@ -157,8 +157,8 @@ static void __end_buffer_read_notouch(struct buffer_head *bh, int uptodate) 
 */

void end_buffer_read_sync(struct buffer_head *bh, int uptodate)

{

	__end_buffer_read_notouch(bh, uptodate);

	put_bh(bh);

	__end_buffer_read_notouch(bh, uptodate);

}

EXPORT_SYMBOL(end_buffer_read_sync);

fs/coredump.c

+1 −1
Original line number Diff line number Diff line
@@ -345,7 +345,7 @@ static bool coredump_parse(struct core_name *cn, struct coredump_params *cprm, 
				was_space = false;

				err = cn_printf(cn, "%c", '\0');

				if (err)

					return err;

					return false;

				(*argv)[(*argc)++] = cn->used;

			}

		}