[kernel] r9546 - in dists/etch-security/linux-2.6/debian: . patches/bugfix patches/series
Dann Frazier
dannf at alioth.debian.org
Tue Sep 25 06:24:14 UTC 2007
Author: dannf
Date: Tue Sep 25 06:24:13 2007
New Revision: 9546
Log:
* bugfix/jffs2-ACL-vs-mode-handling.patch
[SECURITY] Write correct legacy modes to the medium on inode creation to
prevent incorrect permissions upon remount.
Added:
dists/etch-security/linux-2.6/debian/patches/bugfix/jffs2-ACL-vs-mode-handling.patch
Modified:
dists/etch-security/linux-2.6/debian/changelog
dists/etch-security/linux-2.6/debian/patches/series/13etch3
Modified: dists/etch-security/linux-2.6/debian/changelog
==============================================================================
--- dists/etch-security/linux-2.6/debian/changelog (original)
+++ dists/etch-security/linux-2.6/debian/changelog Tue Sep 25 06:24:13 2007
@@ -16,8 +16,11 @@
* bugfix/amd64-zero-extend-32bit-ptrace.patch
[SECURITY] Zero extend all registers after ptrace in 32-bit entry path.
See CVE-2007-4573
+ * bugfix/jffs2-ACL-vs-mode-handling.patch
+ [SECURITY] Write correct legacy modes to the medium on inode creation to
+ prevent incorrect permissions upon remount.
- -- dann frazier <dannf at debian.org> Tue, 25 Sep 2007 00:12:13 -0600
+ -- dann frazier <dannf at debian.org> Tue, 25 Sep 2007 00:19:49 -0600
linux-2.6 (2.6.18.dfsg.1-13etch2) stable-security; urgency=high
Added: dists/etch-security/linux-2.6/debian/patches/bugfix/jffs2-ACL-vs-mode-handling.patch
==============================================================================
--- (empty file)
+++ dists/etch-security/linux-2.6/debian/patches/bugfix/jffs2-ACL-vs-mode-handling.patch Tue Sep 25 06:24:13 2007
@@ -0,0 +1,355 @@
+From: David Woodhouse <dwmw2 at infradead.org>
+Date: Wed, 22 Aug 2007 11:39:19 +0000 (+0100)
+Subject: [JFFS2] Fix ACL vs. mode handling.
+X-Git-Url: http://git.infradead.org/?p=mtd-2.6.git;a=commitdiff_plain;h=9ed437c50d89eabae763dd422579f73fdebf288d
+
+[JFFS2] Fix ACL vs. mode handling.
+
+When POSIX ACL support was enabled, we weren't writing correct
+legacy modes to the medium on inode creation, or when the ACL was set.
+This meant that the permissions would be incorrect after the file system
+was remounted.
+
+Signed-off-by: David Woodhouse <dwmw2 at infradead.org>
+---
+
+diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
+index 65b3a1b..8ec9323 100644
+--- a/fs/jffs2/acl.c
++++ b/fs/jffs2/acl.c
+@@ -176,7 +176,7 @@ static void jffs2_iset_acl(struct inode *inode, struct posix_acl **i_acl, struct
+ spin_unlock(&inode->i_lock);
+ }
+
+-static struct posix_acl *jffs2_get_acl(struct inode *inode, int type)
++struct posix_acl *jffs2_get_acl(struct inode *inode, int type)
+ {
+ struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
+ struct posix_acl *acl;
+@@ -247,8 +247,13 @@ static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
+ if (rc < 0)
+ return rc;
+ if (inode->i_mode != mode) {
+- inode->i_mode = mode;
+- jffs2_dirty_inode(inode);
++ struct iattr attr;
++
++ attr.ia_valid = ATTR_MODE;
++ attr.ia_mode = mode;
++ rc = jffs2_do_setattr(inode, &attr);
++ if (rc < 0)
++ return rc;
+ }
+ if (rc == 0)
+ acl = NULL;
+@@ -307,22 +312,16 @@ int jffs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+ return generic_permission(inode, mask, jffs2_check_acl);
+ }
+
+-int jffs2_init_acl(struct inode *inode, struct inode *dir)
++int jffs2_init_acl(struct inode *inode, struct posix_acl *acl)
+ {
+ struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
+- struct posix_acl *acl = NULL, *clone;
++ struct posix_acl *clone;
+ mode_t mode;
+ int rc = 0;
+
+ f->i_acl_access = JFFS2_ACL_NOT_CACHED;
+ f->i_acl_default = JFFS2_ACL_NOT_CACHED;
+- if (!S_ISLNK(inode->i_mode)) {
+- acl = jffs2_get_acl(dir, ACL_TYPE_DEFAULT);
+- if (IS_ERR(acl))
+- return PTR_ERR(acl);
+- if (!acl)
+- inode->i_mode &= ~current->fs->umask;
+- }
++
+ if (acl) {
+ if (S_ISDIR(inode->i_mode)) {
+ rc = jffs2_set_acl(inode, ACL_TYPE_DEFAULT, acl);
+diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h
+index c84378c..90a2dbf 100644
+--- a/fs/jffs2/acl.h
++++ b/fs/jffs2/acl.h
+@@ -28,9 +28,10 @@ struct jffs2_acl_header {
+
+ #define JFFS2_ACL_NOT_CACHED ((void *)-1)
+
++extern struct posix_acl *jffs2_get_acl(struct inode *inode, int type);
+ extern int jffs2_permission(struct inode *, int, struct nameidata *);
+ extern int jffs2_acl_chmod(struct inode *);
+-extern int jffs2_init_acl(struct inode *, struct inode *);
++extern int jffs2_init_acl(struct inode *, struct posix_acl *);
+ extern void jffs2_clear_acl(struct jffs2_inode_info *);
+
+ extern struct xattr_handler jffs2_acl_access_xattr_handler;
+@@ -38,6 +39,7 @@ extern struct xattr_handler jffs2_acl_default_xattr_handler;
+
+ #else
+
++#define jffs2_get_acl(inode, type) (NULL)
+ #define jffs2_permission NULL
+ #define jffs2_acl_chmod(inode) (0)
+ #define jffs2_init_acl(inode,dir) (0)
+diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
+index d293a1f..8353eb9 100644
+--- a/fs/jffs2/dir.c
++++ b/fs/jffs2/dir.c
+@@ -182,6 +182,7 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
+ struct jffs2_inode_info *f, *dir_f;
+ struct jffs2_sb_info *c;
+ struct inode *inode;
++ struct posix_acl *acl;
+ int ret;
+
+ ri = jffs2_alloc_raw_inode();
+@@ -192,7 +193,7 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
+
+ D1(printk(KERN_DEBUG "jffs2_create()\n"));
+
+- inode = jffs2_new_inode(dir_i, mode, ri);
++ inode = jffs2_new_inode(dir_i, mode, ri, &acl);
+
+ if (IS_ERR(inode)) {
+ D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
+@@ -212,12 +213,12 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
+ dentry->d_name.name, dentry->d_name.len);
+
+ if (ret)
+- goto fail;
++ goto fail_acl;
+
+ ret = jffs2_init_security(inode, dir_i);
+ if (ret)
+- goto fail;
+- ret = jffs2_init_acl(inode, dir_i);
++ goto fail_acl;
++ ret = jffs2_init_acl(inode, acl);
+ if (ret)
+ goto fail;
+
+@@ -230,6 +231,8 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
+ inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
+ return 0;
+
++ fail_acl:
++ posix_acl_release(acl);
+ fail:
+ make_bad_inode(inode);
+ iput(inode);
+@@ -306,6 +309,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
+ struct jffs2_full_dirent *fd;
+ int namelen;
+ uint32_t alloclen;
++ struct posix_acl *acl;
+ int ret, targetlen = strlen(target);
+
+ /* FIXME: If you care. We'd need to use frags for the target
+@@ -332,7 +336,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
+ return ret;
+ }
+
+- inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
++ inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri, &acl);
+
+ if (IS_ERR(inode)) {
+ jffs2_free_raw_inode(ri);
+@@ -362,6 +366,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
+ up(&f->sem);
+ jffs2_complete_reservation(c);
+ jffs2_clear_inode(inode);
++ posix_acl_release(acl);
+ return PTR_ERR(fn);
+ }
+
+@@ -372,6 +377,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
+ up(&f->sem);
+ jffs2_complete_reservation(c);
+ jffs2_clear_inode(inode);
++ posix_acl_release(acl);
+ return -ENOMEM;
+ }
+
+@@ -389,9 +395,10 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
+ ret = jffs2_init_security(inode, dir_i);
+ if (ret) {
+ jffs2_clear_inode(inode);
++ posix_acl_release(acl);
+ return ret;
+ }
+- ret = jffs2_init_acl(inode, dir_i);
++ ret = jffs2_init_acl(inode, acl);
+ if (ret) {
+ jffs2_clear_inode(inode);
+ return ret;
+@@ -469,6 +476,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
+ struct jffs2_full_dirent *fd;
+ int namelen;
+ uint32_t alloclen;
++ struct posix_acl *acl;
+ int ret;
+
+ mode |= S_IFDIR;
+@@ -491,7 +499,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
+ return ret;
+ }
+
+- inode = jffs2_new_inode(dir_i, mode, ri);
++ inode = jffs2_new_inode(dir_i, mode, ri, &acl);
+
+ if (IS_ERR(inode)) {
+ jffs2_free_raw_inode(ri);
+@@ -518,6 +526,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
+ up(&f->sem);
+ jffs2_complete_reservation(c);
+ jffs2_clear_inode(inode);
++ posix_acl_release(acl);
+ return PTR_ERR(fn);
+ }
+ /* No data here. Only a metadata node, which will be
+@@ -531,9 +540,10 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
+ ret = jffs2_init_security(inode, dir_i);
+ if (ret) {
+ jffs2_clear_inode(inode);
++ posix_acl_release(acl);
+ return ret;
+ }
+- ret = jffs2_init_acl(inode, dir_i);
++ ret = jffs2_init_acl(inode, acl);
+ if (ret) {
+ jffs2_clear_inode(inode);
+ return ret;
+@@ -629,6 +639,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
+ union jffs2_device_node dev;
+ int devlen = 0;
+ uint32_t alloclen;
++ struct posix_acl *acl;
+ int ret;
+
+ if (!new_valid_dev(rdev))
+@@ -655,7 +666,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
+ return ret;
+ }
+
+- inode = jffs2_new_inode(dir_i, mode, ri);
++ inode = jffs2_new_inode(dir_i, mode, ri, &acl);
+
+ if (IS_ERR(inode)) {
+ jffs2_free_raw_inode(ri);
+@@ -684,6 +695,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
+ up(&f->sem);
+ jffs2_complete_reservation(c);
+ jffs2_clear_inode(inode);
++ posix_acl_release(acl);
+ return PTR_ERR(fn);
+ }
+ /* No data here. Only a metadata node, which will be
+@@ -697,9 +709,10 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
+ ret = jffs2_init_security(inode, dir_i);
+ if (ret) {
+ jffs2_clear_inode(inode);
++ posix_acl_release(acl);
+ return ret;
+ }
+- ret = jffs2_init_acl(inode, dir_i);
++ ret = jffs2_init_acl(inode, acl);
+ if (ret) {
+ jffs2_clear_inode(inode);
+ return ret;
+diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
+index 1d3b7a9..dd64ddc 100644
+--- a/fs/jffs2/fs.c
++++ b/fs/jffs2/fs.c
+@@ -24,7 +24,7 @@
+
+ static int jffs2_flash_setup(struct jffs2_sb_info *c);
+
+-static int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
++int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
+ {
+ struct jffs2_full_dnode *old_metadata, *new_metadata;
+ struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
+@@ -36,10 +36,8 @@ static int jffs2_do_setattr (struct inode *inode, struct iattr *iattr)
+ unsigned int ivalid;
+ uint32_t alloclen;
+ int ret;
++
+ D1(printk(KERN_DEBUG "jffs2_setattr(): ino #%lu\n", inode->i_ino));
+- ret = inode_change_ok(inode, iattr);
+- if (ret)
+- return ret;
+
+ /* Special cases - we don't want more than one data node
+ for these types on the medium at any time. So setattr
+@@ -183,9 +181,14 @@ int jffs2_setattr(struct dentry *dentry, struct iattr *iattr)
+ {
+ int rc;
+
++ rc = inode_change_ok(dentry->d_inode, iattr);
++ if (rc)
++ return rc;
++
+ rc = jffs2_do_setattr(dentry->d_inode, iattr);
+ if (!rc && (iattr->ia_valid & ATTR_MODE))
+ rc = jffs2_acl_chmod(dentry->d_inode);
++
+ return rc;
+ }
+
+@@ -399,7 +402,8 @@ void jffs2_write_super (struct super_block *sb)
+
+ /* jffs2_new_inode: allocate a new inode and inocache, add it to the hash,
+ fill in the raw_inode while you're at it. */
+-struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_inode *ri)
++struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_inode *ri,
++ struct posix_acl **acl)
+ {
+ struct inode *inode;
+ struct super_block *sb = dir_i->i_sb;
+@@ -431,7 +435,23 @@ struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_i
+ } else {
+ ri->gid = cpu_to_je16(current->fsgid);
+ }
+- ri->mode = cpu_to_jemode(mode);
++
++ /* POSIX ACLs have to be processed now, at least partly.
++ The umask is only applied if there's no default ACL */
++ if (!S_ISLNK(mode)) {
++ *acl = jffs2_get_acl(dir_i, ACL_TYPE_DEFAULT);
++ if (IS_ERR(*acl)) {
++ make_bad_inode(inode);
++ iput(inode);
++ inode = (void *)*acl;
++ *acl = NULL;
++ return inode;
++ }
++ if (!(*acl))
++ mode &= ~current->fs->umask;
++ } else {
++ *acl = NULL;
++ }
+ ret = jffs2_do_new_inode (c, f, mode, ri);
+ if (ret) {
+ make_bad_inode(inode);
+diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
+index 80daea9..f6743a9 100644
+--- a/fs/jffs2/os-linux.h
++++ b/fs/jffs2/os-linux.h
+@@ -173,12 +173,15 @@ int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
+ extern const struct inode_operations jffs2_symlink_inode_operations;
+
+ /* fs.c */
++struct posix_acl;
++
+ int jffs2_setattr (struct dentry *, struct iattr *);
++int jffs2_do_setattr (struct inode *, struct iattr *);
+ void jffs2_read_inode (struct inode *);
+ void jffs2_clear_inode (struct inode *);
+ void jffs2_dirty_inode(struct inode *inode);
+ struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
+- struct jffs2_raw_inode *ri);
++ struct jffs2_raw_inode *ri, struct posix_acl **acl);
+ int jffs2_statfs (struct dentry *, struct kstatfs *);
+ void jffs2_write_super (struct super_block *);
+ int jffs2_remount_fs (struct super_block *, int *, char *);
Modified: dists/etch-security/linux-2.6/debian/patches/series/13etch3
==============================================================================
--- dists/etch-security/linux-2.6/debian/patches/series/13etch3 (original)
+++ dists/etch-security/linux-2.6/debian/patches/series/13etch3 Tue Sep 25 06:24:13 2007
@@ -3,3 +3,4 @@
+ bugfix/prevent-stack-growth-into-hugetlb-region.patch
+ bugfix/cifs-honor-umask.patch
+ bugfix/amd64-zero-extend-32bit-ptrace.patch
++ bugfix/jffs2-ACL-vs-mode-handling.patch
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