| 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: <20070614202651.GA9652@c2.user-mode-linux.org>
Date: Thu, 14 Jun 2007 16:26:51 -0400
From: Jeff Dike <jdike@...toit.com>
To: Andrew Morton <akpm@...l.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 5/5] UML - Eliminate kernel allocator wrappers
UML had two wrapper procedures for kmalloc, um_kmalloc and
um_kmalloc_atomic because the flag constants weren't available in
userspace code. kern_constants.h had made kernel constants available
for a long time, so there is no need for these wrappers any more.
Rather, userspace code calls kmalloc directly with the userspace
versions of the gfp flags.
kmalloc isn't a real procedure, so I had to essentially copy the
inline wrapper around __kmalloc.
vmalloc also had its own wrapper for no good reason. This is now gone.
Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
--
arch/um/drivers/cow_sys.h | 2 +-
arch/um/drivers/daemon_user.c | 4 ++--
arch/um/drivers/fd.c | 2 +-
arch/um/drivers/mcast_user.c | 2 +-
arch/um/drivers/net_user.c | 2 +-
arch/um/drivers/port_user.c | 2 +-
arch/um/drivers/pty.c | 2 +-
arch/um/drivers/slip_user.c | 2 +-
arch/um/drivers/tty.c | 2 +-
arch/um/include/common-offsets.h | 3 +++
arch/um/include/um_malloc.h | 12 +++++++++---
arch/um/kernel/irq.c | 1 -
arch/um/kernel/process.c | 16 ----------------
arch/um/os-Linux/drivers/ethertap_user.c | 4 ++--
arch/um/os-Linux/helper.c | 4 ++--
arch/um/os-Linux/main.c | 4 ++--
arch/um/os-Linux/sigio.c | 4 ++--
17 files changed, 30 insertions(+), 38 deletions(-)
Index: linux-2.6.21-mm/arch/um/drivers/cow_sys.h
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/cow_sys.h 2007-06-14 15:33:34.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/cow_sys.h 2007-06-14 16:08:07.000000000 -0400
@@ -8,7 +8,7 @@
static inline void *cow_malloc(int size)
{
- return um_kmalloc(size);
+ return kmalloc(size, UM_GFP_KERNEL);
}
static inline void cow_free(void *ptr)
Index: linux-2.6.21-mm/arch/um/drivers/daemon_user.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/daemon_user.c 2007-06-14 15:33:34.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/daemon_user.c 2007-06-14 16:08:07.000000000 -0400
@@ -35,7 +35,7 @@ static struct sockaddr_un *new_addr(void
{
struct sockaddr_un *sun;
- sun = um_kmalloc(sizeof(struct sockaddr_un));
+ sun = kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
if(sun == NULL){
printk("new_addr: allocation of sockaddr_un failed\n");
return NULL;
@@ -83,7 +83,7 @@ static int connect_to_switch(struct daem
goto out_close;
}
- sun = um_kmalloc(sizeof(struct sockaddr_un));
+ sun = kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
if(sun == NULL){
printk("new_addr: allocation of sockaddr_un failed\n");
err = -ENOMEM;
Index: linux-2.6.21-mm/arch/um/drivers/fd.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/fd.c 2007-06-14 15:33:34.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/fd.c 2007-06-14 16:08:07.000000000 -0400
@@ -37,7 +37,7 @@ static void *fd_init(char *str, int devi
printk("fd_init : couldn't parse file descriptor '%s'\n", str);
return(NULL);
}
- data = um_kmalloc(sizeof(*data));
+ data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
if(data == NULL) return(NULL);
*data = ((struct fd_chan) { .fd = n,
.raw = opts->raw });
Index: linux-2.6.21-mm/arch/um/drivers/mcast_user.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/mcast_user.c 2007-06-14 15:33:34.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/mcast_user.c 2007-06-14 16:08:07.000000000 -0400
@@ -30,7 +30,7 @@ static struct sockaddr_in *new_addr(char
{
struct sockaddr_in *sin;
- sin = um_kmalloc(sizeof(struct sockaddr_in));
+ sin = kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
if(sin == NULL){
printk("new_addr: allocation of sockaddr_in failed\n");
return NULL;
Index: linux-2.6.21-mm/arch/um/drivers/net_user.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/net_user.c 2007-06-14 16:07:30.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/net_user.c 2007-06-14 16:08:07.000000000 -0400
@@ -217,7 +217,7 @@ static void change(char *dev, char *what
netmask[2], netmask[3]);
output_len = UM_KERN_PAGE_SIZE;
- output = um_kmalloc(output_len);
+ output = kmalloc(output_len, UM_GFP_KERNEL);
if(output == NULL)
printk("change : failed to allocate output buffer\n");
Index: linux-2.6.21-mm/arch/um/drivers/pty.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/pty.c 2007-06-14 15:35:13.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/pty.c 2007-06-14 16:08:07.000000000 -0400
@@ -29,7 +29,7 @@ static void *pty_chan_init(char *str, in
{
struct pty_chan *data;
- data = um_kmalloc(sizeof(*data));
+ data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
if (data == NULL)
return NULL;
Index: linux-2.6.21-mm/arch/um/drivers/slip_user.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/slip_user.c 2007-06-14 16:07:30.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/slip_user.c 2007-06-14 16:08:07.000000000 -0400
@@ -91,7 +91,7 @@ static int slip_tramp(char **argv, int f
pid = err;
output_len = UM_KERN_PAGE_SIZE;
- output = um_kmalloc(output_len);
+ output = kmalloc(output_len, UM_GFP_KERNEL);
if(output == NULL){
printk("slip_tramp : failed to allocate output buffer\n");
os_kill_process(pid, 1);
Index: linux-2.6.21-mm/arch/um/drivers/tty.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/tty.c 2007-06-14 15:33:34.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/tty.c 2007-06-14 16:08:07.000000000 -0400
@@ -29,7 +29,7 @@ static void *tty_chan_init(char *str, in
}
str++;
- data = um_kmalloc(sizeof(*data));
+ data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
if(data == NULL)
return NULL;
*data = ((struct tty_chan) { .dev = str,
Index: linux-2.6.21-mm/arch/um/include/common-offsets.h
===================================================================
--- linux-2.6.21-mm.orig/arch/um/include/common-offsets.h 2007-06-14 16:00:19.000000000 -0400
+++ linux-2.6.21-mm/arch/um/include/common-offsets.h 2007-06-14 16:08:07.000000000 -0400
@@ -27,6 +27,9 @@ DEFINE(UM_ELFCLASS64, ELFCLASS64);
DEFINE(UM_NR_CPUS, NR_CPUS);
+DEFINE(UM_GFP_KERNEL, GFP_KERNEL);
+DEFINE(UM_GFP_ATOMIC, GFP_ATOMIC);
+
/* For crypto assembler code. */
DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
Index: linux-2.6.21-mm/arch/um/include/um_malloc.h
===================================================================
--- linux-2.6.21-mm.orig/arch/um/include/um_malloc.h 2007-06-14 15:33:34.000000000 -0400
+++ linux-2.6.21-mm/arch/um/include/um_malloc.h 2007-06-14 16:08:07.000000000 -0400
@@ -6,11 +6,17 @@
#ifndef __UM_MALLOC_H__
#define __UM_MALLOC_H__
-extern void *um_kmalloc(int size);
-extern void *um_kmalloc_atomic(int size);
+#include "kern_constants.h"
+
+extern void *__kmalloc(int size, int flags);
+static inline void *kmalloc(int size, int flags)
+{
+ return __kmalloc(size, flags);
+}
+
extern void kfree(const void *ptr);
-extern void *um_vmalloc(int size);
+extern void *vmalloc(unsigned long size);
extern void vfree(void *ptr);
#endif /* __UM_MALLOC_H__ */
Index: linux-2.6.21-mm/arch/um/kernel/irq.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/kernel/irq.c 2007-06-14 15:33:34.000000000 -0400
+++ linux-2.6.21-mm/arch/um/kernel/irq.c 2007-06-14 16:08:07.000000000 -0400
@@ -30,7 +30,6 @@
#include "irq_kern.h"
#include "os.h"
#include "sigio.h"
-#include "um_malloc.h"
#include "misc_constants.h"
#include "as-layout.h"
Index: linux-2.6.21-mm/arch/um/kernel/process.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/kernel/process.c 2007-06-14 15:33:34.000000000 -0400
+++ linux-2.6.21-mm/arch/um/kernel/process.c 2007-06-14 16:08:07.000000000 -0400
@@ -46,7 +46,6 @@
#include "mode.h"
#include "mode_kern.h"
#include "choose-mode.h"
-#include "um_malloc.h"
/* This is a per-cpu array. A processor only modifies its entry and it only
* cares about its entry, so it's OK if another processor is modifying its
@@ -262,21 +261,6 @@ void dump_thread(struct pt_regs *regs, s
{
}
-void *um_kmalloc(int size)
-{
- return kmalloc(size, GFP_KERNEL);
-}
-
-void *um_kmalloc_atomic(int size)
-{
- return kmalloc(size, GFP_ATOMIC);
-}
-
-void *um_vmalloc(int size)
-{
- return vmalloc(size);
-}
-
int __cant_sleep(void) {
return in_atomic() || irqs_disabled() || in_interrupt();
/* Is in_interrupt() really needed? */
Index: linux-2.6.21-mm/arch/um/os-Linux/drivers/ethertap_user.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/drivers/ethertap_user.c 2007-06-14 16:07:30.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/drivers/ethertap_user.c 2007-06-14 16:08:07.000000000 -0400
@@ -54,7 +54,7 @@ static void etap_change(int op, unsigned
return;
}
- output = um_kmalloc(UM_KERN_PAGE_SIZE);
+ output = kmalloc(UM_KERN_PAGE_SIZE, UM_GFP_KERNEL);
if(output == NULL)
printk("etap_change : Failed to allocate output buffer\n");
read_output(fd, output, UM_KERN_PAGE_SIZE);
@@ -166,7 +166,7 @@ static int etap_open(void *data)
err = etap_tramp(pri->dev_name, pri->gate_addr, control_fds[0],
control_fds[1], data_fds[0], data_fds[1]);
output_len = UM_KERN_PAGE_SIZE;
- output = um_kmalloc(output_len);
+ output = kmalloc(output_len, UM_GFP_KERNEL);
read_output(control_fds[0], output, output_len);
if(output == NULL)
Index: linux-2.6.21-mm/arch/um/os-Linux/helper.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/helper.c 2007-06-14 16:07:30.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/helper.c 2007-06-14 16:08:07.000000000 -0400
@@ -72,8 +72,8 @@ int run_helper(void (*pre_exec)(void *),
data.pre_data = pre_data;
data.argv = argv;
data.fd = fds[1];
- data.buf = __cant_sleep() ? um_kmalloc_atomic(PATH_MAX) :
- um_kmalloc(PATH_MAX);
+ data.buf = __cant_sleep() ? kmalloc(PATH_MAX, UM_GFP_ATOMIC) :
+ kmalloc(PATH_MAX, UM_GFP_KERNEL);
pid = clone(helper_child, (void *) sp, CLONE_VM | SIGCHLD, &data);
if (pid < 0) {
ret = -errno;
Index: linux-2.6.21-mm/arch/um/os-Linux/main.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/main.c 2007-06-14 16:00:19.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/main.c 2007-06-14 16:08:07.000000000 -0400
@@ -235,8 +235,8 @@ void *__wrap_malloc(int size)
return __real_malloc(size);
else if(size <= UM_KERN_PAGE_SIZE)
/* finding contiguous pages can be hard*/
- ret = um_kmalloc(size);
- else ret = um_vmalloc(size);
+ ret = kmalloc(size, UM_GFP_KERNEL);
+ else ret = vmalloc(size);
/* glibc people insist that if malloc fails, errno should be
* set by malloc as well. So we do.
Index: linux-2.6.21-mm/arch/um/os-Linux/sigio.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/os-Linux/sigio.c 2007-06-14 16:07:30.000000000 -0400
+++ linux-2.6.21-mm/arch/um/os-Linux/sigio.c 2007-06-14 16:08:07.000000000 -0400
@@ -105,7 +105,7 @@ static int need_poll(struct pollfds *pol
if(n <= polls->size)
return 0;
- new = um_kmalloc_atomic(n * sizeof(struct pollfd));
+ new = kmalloc(n * sizeof(struct pollfd), UM_GFP_ATOMIC);
if(new == NULL){
printk("need_poll : failed to allocate new pollfds\n");
return -ENOMEM;
@@ -233,7 +233,7 @@ static struct pollfd *setup_initial_poll
{
struct pollfd *p;
- p = um_kmalloc(sizeof(struct pollfd));
+ p = kmalloc(sizeof(struct pollfd), UM_GFP_KERNEL);
if (p == NULL) {
printk("setup_initial_poll : failed to allocate poll\n");
return NULL;
Index: linux-2.6.21-mm/arch/um/drivers/port_user.c
===================================================================
--- linux-2.6.21-mm.orig/arch/um/drivers/port_user.c 2007-06-14 16:07:30.000000000 -0400
+++ linux-2.6.21-mm/arch/um/drivers/port_user.c 2007-06-14 16:08:07.000000000 -0400
@@ -50,7 +50,7 @@ static void *port_init(char *str, int de
if(kern_data == NULL)
return NULL;
- data = um_kmalloc(sizeof(*data));
+ data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
if(data == NULL)
goto err;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists