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-rw-r--r--fs/ext2/balloc.c21
-rw-r--r--fs/ext2/ext2.h3
-rw-r--r--fs/ext2/file.c4
-rw-r--r--fs/ext2/inode.c22
-rw-r--r--fs/ext2/super.c11
-rw-r--r--fs/ext2/xattr.c9
-rw-r--r--fs/ext2/xattr_security.c7
-rw-r--r--fs/ext2/xattr_trusted.c7
-rw-r--r--fs/ext2/xattr_user.c9
9 files changed, 66 insertions, 27 deletions
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 9f9992b37924..4c40c0786e16 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -1194,6 +1194,27 @@ static int ext2_has_free_blocks(struct ext2_sb_info *sbi)
}
/*
+ * Returns 1 if the passed-in block region is valid; 0 if some part overlaps
+ * with filesystem metadata blocksi.
+ */
+int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
+ unsigned int count)
+{
+ if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) ||
+ (start_blk + count < start_blk) ||
+ (start_blk > le32_to_cpu(sbi->s_es->s_blocks_count)))
+ return 0;
+
+ /* Ensure we do not step over superblock */
+ if ((start_blk <= sbi->s_sb_block) &&
+ (start_blk + count >= sbi->s_sb_block))
+ return 0;
+
+
+ return 1;
+}
+
+/*
* ext2_new_blocks() -- core block(s) allocation function
* @inode: file inode
* @goal: given target block(filesystem wide)
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 170939f379d7..3fb93681bf7f 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -367,6 +367,7 @@ struct ext2_inode {
*/
#define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
#define EXT2_ERROR_FS 0x0002 /* Errors detected */
+#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
/*
* Mount flags
@@ -739,6 +740,8 @@ extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group);
extern ext2_fsblk_t ext2_new_block(struct inode *, unsigned long, int *);
extern ext2_fsblk_t ext2_new_blocks(struct inode *, unsigned long,
unsigned long *, int *);
+extern int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
+ unsigned int count);
extern void ext2_free_blocks (struct inode *, unsigned long,
unsigned long);
extern unsigned long ext2_count_free_blocks (struct super_block *);
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index c1400b109805..5efeefe17abb 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -51,7 +51,7 @@ static int ext2_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
}
down_read(&ei->dax_sem);
- ret = __dax_fault(vma, vmf, ext2_get_block, NULL);
+ ret = dax_fault(vma, vmf, ext2_get_block);
up_read(&ei->dax_sem);
if (vmf->flags & FAULT_FLAG_WRITE)
@@ -72,7 +72,7 @@ static int ext2_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
}
down_read(&ei->dax_sem);
- ret = __dax_pmd_fault(vma, addr, pmd, flags, ext2_get_block, NULL);
+ ret = dax_pmd_fault(vma, addr, pmd, flags, ext2_get_block);
up_read(&ei->dax_sem);
if (flags & FAULT_FLAG_WRITE)
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index b675610391b8..d5c7d09919f3 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -26,6 +26,7 @@
#include <linux/highuid.h>
#include <linux/pagemap.h>
#include <linux/dax.h>
+#include <linux/blkdev.h>
#include <linux/quotaops.h>
#include <linux/writeback.h>
#include <linux/buffer_head.h>
@@ -737,19 +738,18 @@ static int ext2_get_blocks(struct inode *inode,
* so that it's not found by another thread before it's
* initialised
*/
- err = dax_clear_sectors(inode->i_sb->s_bdev,
- le32_to_cpu(chain[depth-1].key) <<
- (inode->i_blkbits - 9),
- 1 << inode->i_blkbits);
+ err = sb_issue_zeroout(inode->i_sb,
+ le32_to_cpu(chain[depth-1].key), count,
+ GFP_NOFS);
if (err) {
mutex_unlock(&ei->truncate_mutex);
goto cleanup;
}
- }
+ } else
+ set_buffer_new(bh_result);
ext2_splice_branch(inode, iblock, partial, indirect_blks, count);
mutex_unlock(&ei->truncate_mutex);
- set_buffer_new(bh_result);
got_it:
map_bh(bh_result, inode->i_sb, le32_to_cpu(chain[depth-1].key));
if (count > blocks_to_boundary)
@@ -1389,6 +1389,16 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
ei->i_frag_size = raw_inode->i_fsize;
ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl);
ei->i_dir_acl = 0;
+
+ if (ei->i_file_acl &&
+ !ext2_data_block_valid(EXT2_SB(sb), ei->i_file_acl, 1)) {
+ ext2_error(sb, "ext2_iget", "bad extended attribute block %u",
+ ei->i_file_acl);
+ brelse(bh);
+ ret = -EFSCORRUPTED;
+ goto bad_inode;
+ }
+
if (S_ISREG(inode->i_mode))
inode->i_size |= ((__u64)le32_to_cpu(raw_inode->i_size_high)) << 32;
else
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index b78caf25f746..1d9379568aa8 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -922,16 +922,9 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
- if (blocksize != PAGE_SIZE) {
- ext2_msg(sb, KERN_ERR,
- "error: unsupported blocksize for dax");
+ err = bdev_dax_supported(sb, blocksize);
+ if (err)
goto failed_mount;
- }
- if (!sb->s_bdev->bd_disk->fops->direct_access) {
- ext2_msg(sb, KERN_ERR,
- "error: device does not support dax");
- goto failed_mount;
- }
}
/* If the blocksize doesn't match, re-read the thing.. */
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 1a5e3bff0b63..b7f896f3f7a7 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -759,10 +759,19 @@ void
ext2_xattr_delete_inode(struct inode *inode)
{
struct buffer_head *bh = NULL;
+ struct ext2_sb_info *sbi = EXT2_SB(inode->i_sb);
down_write(&EXT2_I(inode)->xattr_sem);
if (!EXT2_I(inode)->i_file_acl)
goto cleanup;
+
+ if (!ext2_data_block_valid(sbi, EXT2_I(inode)->i_file_acl, 0)) {
+ ext2_error(inode->i_sb, "ext2_xattr_delete_inode",
+ "inode %ld: xattr block %d is out of data blocks range",
+ inode->i_ino, EXT2_I(inode)->i_file_acl);
+ goto cleanup;
+ }
+
bh = sb_bread(inode->i_sb, EXT2_I(inode)->i_file_acl);
if (!bh) {
ext2_error(inode->i_sb, "ext2_xattr_delete_inode",
diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c
index 7fd3b867ce65..7b9e9c1842d5 100644
--- a/fs/ext2/xattr_security.c
+++ b/fs/ext2/xattr_security.c
@@ -18,10 +18,11 @@ ext2_xattr_security_get(const struct xattr_handler *handler,
static int
ext2_xattr_security_set(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+ struct dentry *unused, struct inode *inode,
+ const char *name, const void *value,
+ size_t size, int flags)
{
- return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_SECURITY, name,
+ return ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, name,
value, size, flags);
}
diff --git a/fs/ext2/xattr_trusted.c b/fs/ext2/xattr_trusted.c
index 0f85705ff519..65049b71af13 100644
--- a/fs/ext2/xattr_trusted.c
+++ b/fs/ext2/xattr_trusted.c
@@ -25,10 +25,11 @@ ext2_xattr_trusted_get(const struct xattr_handler *handler,
static int
ext2_xattr_trusted_set(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+ struct dentry *unused, struct inode *inode,
+ const char *name, const void *value,
+ size_t size, int flags)
{
- return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_TRUSTED, name,
+ return ext2_xattr_set(inode, EXT2_XATTR_INDEX_TRUSTED, name,
value, size, flags);
}
diff --git a/fs/ext2/xattr_user.c b/fs/ext2/xattr_user.c
index 1fafd27037cc..fb2f992ae763 100644
--- a/fs/ext2/xattr_user.c
+++ b/fs/ext2/xattr_user.c
@@ -29,13 +29,14 @@ ext2_xattr_user_get(const struct xattr_handler *handler,
static int
ext2_xattr_user_set(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+ struct dentry *unused, struct inode *inode,
+ const char *name, const void *value,
+ size_t size, int flags)
{
- if (!test_opt(dentry->d_sb, XATTR_USER))
+ if (!test_opt(inode->i_sb, XATTR_USER))
return -EOPNOTSUPP;
- return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_USER,
+ return ext2_xattr_set(inode, EXT2_XATTR_INDEX_USER,
name, value, size, flags);
}
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