[kernel] r8376 - in
dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian:
. patches patches/series
Dann Frazier
dannf at alioth.debian.org
Tue Mar 20 08:04:29 UTC 2007
Author: dannf
Date: Tue Mar 20 07:04:27 2007
New Revision: 8376
Added:
dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/patches/listxattr-mem-corruption.dpatch
Modified:
dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/changelog
dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/patches/series/2.6.8-16sarge7
Log:
* listxattr-mem-corruption.dpatch
[SECURITY] Fix userspace corruption vulnerability caused by
incorrectly promoted return values in bad_inode_ops
See CVE-2006-5753
Modified: dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/changelog
==============================================================================
--- dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/changelog (original)
+++ dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/changelog Tue Mar 20 07:04:27 2007
@@ -24,8 +24,12 @@
[SECURITY] Add additional length checks to avoid potential remote
DoS attacks in the handling of CAPI messages in the bluetooth driver
See CVE-2006-6106
+ * listxattr-mem-corruption.dpatch
+ [SECURITY] Fix userspace corruption vulnerability caused by
+ incorrectly promoted return values in bad_inode_ops
+ See CVE-2006-5753
- -- dann frazier <dannf at debian.org> Tue, 27 Feb 2007 00:00:25 -0700
+ -- dann frazier <dannf at debian.org> Tue, 20 Mar 2007 00:47:10 -0600
kernel-source-2.6.8 (2.6.8-16sarge6) stable-security; urgency=high
Added: dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/patches/listxattr-mem-corruption.dpatch
==============================================================================
--- (empty file)
+++ dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/patches/listxattr-mem-corruption.dpatch Tue Mar 20 07:04:27 2007
@@ -0,0 +1,400 @@
+From: Eric Sandeen <sandeen at redhat.com>
+Date: Sat, 6 Jan 2007 00:36:36 +0000 (-0800)
+Subject: [PATCH] fix memory corruption from misinterpreted bad_inode_ops return values
+X-Git-Tag: v2.6.20-rc4~60
+X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=be6aab0e9fa6d3c6d75aa1e38ac972d8b4ee82b8;hp=2723f9603a8f8bb2cd8c7b581f7c94b8d75e3837
+
+[PATCH] fix memory corruption from misinterpreted bad_inode_ops return values
+
+CVE-2006-5753 is for a case where an inode can be marked bad, switching
+the ops to bad_inode_ops, which are all connected as:
+
+static int return_EIO(void)
+{
+ return -EIO;
+}
+
+#define EIO_ERROR ((void *) (return_EIO))
+
+static struct inode_operations bad_inode_ops =
+{
+ .create = bad_inode_create
+...etc...
+
+The problem here is that the void cast causes return types to not be
+promoted, and for ops such as listxattr which expect more than 32 bits of
+return value, the 32-bit -EIO is interpreted as a large positive 64-bit
+number, i.e. 0x00000000fffffffa instead of 0xfffffffa.
+
+This goes particularly badly when the return value is taken as a number of
+bytes to copy into, say, a user's buffer for example...
+
+I originally had coded up the fix by creating a return_EIO_<TYPE> macro
+for each return type, like this:
+
+static int return_EIO_int(void)
+{
+ return -EIO;
+}
+#define EIO_ERROR_INT ((void *) (return_EIO_int))
+
+static struct inode_operations bad_inode_ops =
+{
+ .create = EIO_ERROR_INT,
+...etc...
+
+but Al felt that it was probably better to create an EIO-returner for each
+actual op signature. Since so few ops share a signature, I just went ahead
+& created an EIO function for each individual file & inode op that returns
+a value.
+
+Signed-off-by: Eric Sandeen <sandeen at redhat.com>
+Cc: Al Viro <viro at zeniv.linux.org.uk>
+Signed-off-by: Andrew Morton <akpm at osdl.org>
+Signed-off-by: Linus Torvalds <torvalds at osdl.org>
+---
+
+Backported to Debian's 2.6.8 by dann frazier <dannf at debian.org>
+
+--- kernel-source-2.6.8.orig/fs/bad_inode.c 2004-08-13 23:36:32.000000000 -0600
++++ kernel-source-2.6.8/fs/bad_inode.c 2007-03-20 01:02:40.000000000 -0600
+@@ -14,6 +14,125 @@
+ #include <linux/time.h>
+ #include <linux/smp_lock.h>
+ #include <linux/namei.h>
++#include <linux/poll.h>
++
++
++static loff_t bad_file_llseek(struct file *file, loff_t offset, int origin)
++{
++ return -EIO;
++}
++
++static ssize_t bad_file_read(struct file *filp, char __user *buf,
++ size_t size, loff_t *ppos)
++{
++ return -EIO;
++}
++
++static ssize_t bad_file_write(struct file *filp, const char __user *buf,
++ size_t siz, loff_t *ppos)
++{
++ return -EIO;
++}
++
++static ssize_t bad_file_aio_read(struct kiocb *iocb, char __user *buf,
++ size_t siz, loff_t pos)
++{
++ return -EIO;
++}
++
++static ssize_t bad_file_aio_write(struct kiocb *iocb, const char __user *buf,
++ size_t siz, loff_t pos)
++{
++ return -EIO;
++}
++
++static int bad_file_readdir(struct file *filp, void *dirent, filldir_t filldir)
++{
++ return -EIO;
++}
++
++static unsigned int bad_file_poll(struct file *filp, poll_table *wait)
++{
++ return POLLERR;
++}
++
++static int bad_file_ioctl (struct inode *inode, struct file *filp,
++ unsigned int cmd, unsigned long arg)
++{
++ return -EIO;
++}
++
++static int bad_file_mmap(struct file *file, struct vm_area_struct *vma)
++{
++ return -EIO;
++}
++
++static int bad_file_open(struct inode *inode, struct file *filp)
++{
++ return -EIO;
++}
++
++static int bad_file_flush(struct file *file)
++{
++ return -EIO;
++}
++
++static int bad_file_release(struct inode *inode, struct file *filp)
++{
++ return -EIO;
++}
++
++static int bad_file_fsync(struct file *file, struct dentry *dentry,
++ int datasync)
++{
++ return -EIO;
++}
++
++static int bad_file_aio_fsync(struct kiocb *iocb, int datasync)
++{
++ return -EIO;
++}
++
++static int bad_file_fasync(int fd, struct file *filp, int on)
++{
++ return -EIO;
++}
++
++static int bad_file_lock(struct file *file, int cmd, struct file_lock *fl)
++{
++ return -EIO;
++}
++
++static ssize_t bad_file_readv(struct file *filp, const struct iovec *iov,
++ unsigned long nr_segs, loff_t *ppos)
++{
++ return -EIO;
++}
++
++static ssize_t bad_file_writev(struct file *filp, const struct iovec *iov,
++ unsigned long nr_segs, loff_t *ppos)
++{
++ return -EIO;
++}
++
++static ssize_t bad_file_sendfile(struct file *in_file, loff_t *ppos,
++ size_t count, read_actor_t actor, void *target)
++{
++ return -EIO;
++}
++
++static ssize_t bad_file_sendpage(struct file *file, struct page *page,
++ int off, size_t len, loff_t *pos, int more)
++{
++ return -EIO;
++}
++
++static unsigned long bad_file_get_unmapped_area(struct file *file,
++ unsigned long addr, unsigned long len,
++ unsigned long pgoff, unsigned long flags)
++{
++ return -EIO;
++}
+
+ /*
+ * The follow_link operation is special: it must behave as a no-op
+@@ -26,59 +145,152 @@ static int bad_follow_link(struct dentry
+ return 0;
+ }
+
+-static int return_EIO(void)
++static struct file_operations bad_file_ops =
++{
++ .llseek = bad_file_llseek,
++ .read = bad_file_read,
++ .write = bad_file_write,
++ .aio_read = bad_file_aio_read,
++ .aio_write = bad_file_aio_write,
++ .readdir = bad_file_readdir,
++ .poll = bad_file_poll,
++ .ioctl = bad_file_ioctl,
++ .mmap = bad_file_mmap,
++ .open = bad_file_open,
++ .flush = bad_file_flush,
++ .release = bad_file_release,
++ .fsync = bad_file_fsync,
++ .aio_fsync = bad_file_aio_fsync,
++ .fasync = bad_file_fasync,
++ .lock = bad_file_lock,
++ .readv = bad_file_readv,
++ .writev = bad_file_writev,
++ .sendfile = bad_file_sendfile,
++ .sendpage = bad_file_sendpage,
++ .get_unmapped_area = bad_file_get_unmapped_area,
++};
++
++static int bad_inode_create (struct inode *dir, struct dentry *dentry,
++ int mode, struct nameidata *nd)
+ {
+ return -EIO;
+ }
+
+-#define EIO_ERROR ((void *) (return_EIO))
++static struct dentry *bad_inode_lookup(struct inode *dir,
++ struct dentry *dentry, struct nameidata *nd)
++{
++ return ERR_PTR(-EIO);
++}
+
+-static struct file_operations bad_file_ops =
++static int bad_inode_link (struct dentry *old_dentry, struct inode *dir,
++ struct dentry *dentry)
+ {
+- .llseek = EIO_ERROR,
+- .aio_read = EIO_ERROR,
+- .read = EIO_ERROR,
+- .write = EIO_ERROR,
+- .aio_write = EIO_ERROR,
+- .readdir = EIO_ERROR,
+- .poll = EIO_ERROR,
+- .ioctl = EIO_ERROR,
+- .mmap = EIO_ERROR,
+- .open = EIO_ERROR,
+- .flush = EIO_ERROR,
+- .release = EIO_ERROR,
+- .fsync = EIO_ERROR,
+- .aio_fsync = EIO_ERROR,
+- .fasync = EIO_ERROR,
+- .lock = EIO_ERROR,
+- .readv = EIO_ERROR,
+- .writev = EIO_ERROR,
+- .sendfile = EIO_ERROR,
+- .sendpage = EIO_ERROR,
+- .get_unmapped_area = EIO_ERROR,
+-};
++ return -EIO;
++}
++
++static int bad_inode_unlink(struct inode *dir, struct dentry *dentry)
++{
++ return -EIO;
++}
++
++static int bad_inode_symlink (struct inode *dir, struct dentry *dentry,
++ const char *symname)
++{
++ return -EIO;
++}
++
++static int bad_inode_mkdir(struct inode *dir, struct dentry *dentry,
++ int mode)
++{
++ return -EIO;
++}
++
++static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry)
++{
++ return -EIO;
++}
++
++static int bad_inode_mknod (struct inode *dir, struct dentry *dentry,
++ int mode, dev_t rdev)
++{
++ return -EIO;
++}
++
++static int bad_inode_rename (struct inode *old_dir, struct dentry *old_dentry,
++ struct inode *new_dir, struct dentry *new_dentry)
++{
++ return -EIO;
++}
++
++static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
++ int buflen)
++{
++ return -EIO;
++}
++
++static int bad_inode_permission(struct inode *inode, int mask,
++ struct nameidata *nd)
++{
++ return -EIO;
++}
++
++static int bad_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
++ struct kstat *stat)
++{
++ return -EIO;
++}
++
++static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs)
++{
++ return -EIO;
++}
++
++static int bad_inode_setxattr(struct dentry *dentry, const char *name,
++ const void *value, size_t size, int flags)
++{
++ return -EIO;
++}
++
++static ssize_t bad_inode_getxattr(struct dentry *dentry, const char *name,
++ void *buffer, size_t size)
++{
++ return -EIO;
++}
++
++static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer,
++ size_t buffer_size)
++{
++ return -EIO;
++}
++
++static int bad_inode_removexattr(struct dentry *dentry, const char *name)
++{
++ return -EIO;
++}
+
+ struct inode_operations bad_inode_ops =
+ {
+- .create = EIO_ERROR,
+- .lookup = EIO_ERROR,
+- .link = EIO_ERROR,
+- .unlink = EIO_ERROR,
+- .symlink = EIO_ERROR,
+- .mkdir = EIO_ERROR,
+- .rmdir = EIO_ERROR,
+- .mknod = EIO_ERROR,
+- .rename = EIO_ERROR,
+- .readlink = EIO_ERROR,
++ .create = bad_inode_create,
++ .lookup = bad_inode_lookup,
++ .link = bad_inode_link,
++ .unlink = bad_inode_unlink,
++ .symlink = bad_inode_symlink,
++ .mkdir = bad_inode_mkdir,
++ .rmdir = bad_inode_rmdir,
++ .mknod = bad_inode_mknod,
++ .rename = bad_inode_rename,
++ .readlink = bad_inode_readlink,
+ .follow_link = bad_follow_link,
+- .truncate = EIO_ERROR,
+- .permission = EIO_ERROR,
+- .getattr = EIO_ERROR,
+- .setattr = EIO_ERROR,
+- .setxattr = EIO_ERROR,
+- .getxattr = EIO_ERROR,
+- .listxattr = EIO_ERROR,
+- .removexattr = EIO_ERROR,
++ /* put_link returns void */
++ /* truncate returns void */
++ .permission = bad_inode_permission,
++ .getattr = bad_inode_getattr,
++ .setattr = bad_inode_setattr,
++ .setxattr = bad_inode_setxattr,
++ .getxattr = bad_inode_getxattr,
++ .listxattr = bad_inode_listxattr,
++ .removexattr = bad_inode_removexattr,
++ /* truncate_range returns void */
+ };
+
+
+@@ -100,7 +312,7 @@ struct inode_operations bad_inode_ops =
+ * on it to fail from this point on.
+ */
+
+-void make_bad_inode(struct inode * inode)
++void make_bad_inode(struct inode *inode)
+ {
+ remove_inode_hash(inode);
+
+@@ -124,7 +336,7 @@ EXPORT_SYMBOL(make_bad_inode);
+ * Returns true if the inode in question has been marked as bad.
+ */
+
+-int is_bad_inode(struct inode * inode)
++int is_bad_inode(struct inode *inode)
+ {
+ return (inode->i_op == &bad_inode_ops);
+ }
Modified: dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/patches/series/2.6.8-16sarge7
==============================================================================
--- dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/patches/series/2.6.8-16sarge7 (original)
+++ dists/sarge-security/kernel/source/kernel-source-2.6.8-2.6.8/debian/patches/series/2.6.8-16sarge7 Tue Mar 20 07:04:27 2007
@@ -4,3 +4,4 @@
+ dvb-core-handle-0-length-ule-sndu.dpatch
+ smbfs-honor-mount-opts-2.dpatch
+ bluetooth-capi-size-checks.dpatch
++ listxattr-mem-corruption.dpatch
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