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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

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Ted writes:
	Various ext4 bug fixes; primarily making ext4 more robust against
	maliciously crafted file systems, and some DAX fixes.

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4, dax: set ext4_dax_aops for dax files
  ext4, dax: add ext4_bmap to ext4_dax_aops
  ext4: don't mark mmp buffer head dirty
  ext4: show test_dummy_encryption mount option in /proc/mounts
  ext4: close race between direct IO and ext4_break_layouts()
  ext4: fix online resizing for bigalloc file systems with a 1k block size
  ext4: fix online resize's handling of a too-small final block group
  ext4: recalucate superblock checksum after updating free blocks/inodes
  ext4: avoid arithemetic overflow that can trigger a BUG
  ext4: avoid divide by zero fault when deleting corrupted inline directories
  ext4: check to make sure the rename(2)'s destination is not freed
  ext4: add nonstring annotations to ext4.h
This commit is contained in:
Greg Kroah-Hartman
2018-09-17 09:13:47 +02:00
parent c0747ad363 cce6c9f7e6
commit ad3273d5f1
8 changed files with 72 additions and 26 deletions
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20
fs/ext4/inode.c
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@@ -3413,12 +3413,16 @@ static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
{
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
unsigned int blkbits = inode->i_blkbits;
unsigned long first_block = offset >> blkbits;
unsigned long last_block = (offset + length - 1) >> blkbits;
unsigned long first_block, last_block;
struct ext4_map_blocks map;
bool delalloc = false;
int ret;
if ((offset >> blkbits) > EXT4_MAX_LOGICAL_BLOCK)
return -EINVAL;
first_block = offset >> blkbits;
last_block = min_t(loff_t, (offset + length - 1) >> blkbits,
EXT4_MAX_LOGICAL_BLOCK);
if (flags & IOMAP_REPORT) {
if (ext4_has_inline_data(inode)) {
@@ -3948,6 +3952,7 @@ static const struct address_space_operations ext4_dax_aops = {
.writepages = ext4_dax_writepages,
.direct_IO = noop_direct_IO,
.set_page_dirty = noop_set_page_dirty,
.bmap = ext4_bmap,
.invalidatepage = noop_invalidatepage,
};
@@ -4192,9 +4197,8 @@ int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset,
return 0;
}
static void ext4_wait_dax_page(struct ext4_inode_info *ei, bool *did_unlock)
static void ext4_wait_dax_page(struct ext4_inode_info *ei)
{
*did_unlock = true;
up_write(&ei->i_mmap_sem);
schedule();
down_write(&ei->i_mmap_sem);
@@ -4204,14 +4208,12 @@ int ext4_break_layouts(struct inode *inode)
{
struct ext4_inode_info *ei = EXT4_I(inode);
struct page *page;
bool retry;
int error;
if (WARN_ON_ONCE(!rwsem_is_locked(&ei->i_mmap_sem)))
return -EINVAL;
do {
retry = false;
page = dax_layout_busy_page(inode->i_mapping);
if (!page)
return 0;
@@ -4219,8 +4221,8 @@ int ext4_break_layouts(struct inode *inode)
error = ___wait_var_event(&page->_refcount,
atomic_read(&page->_refcount) == 1,
TASK_INTERRUPTIBLE, 0, 0,
ext4_wait_dax_page(ei, &retry));
} while (error == 0 && retry);
ext4_wait_dax_page(ei));
} while (error == 0);
return error;
}
@@ -4895,6 +4897,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
* not initialized on a new filesystem. */
}
ei->i_flags = le32_to_cpu(raw_inode->i_flags);
ext4_set_inode_flags(inode);
inode->i_blocks = ext4_inode_blocks(raw_inode, ei);
ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl_lo);
if (ext4_has_feature_64bit(sb))
@@ -5041,7 +5044,6 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
goto bad_inode;
}
brelse(iloc.bh);
ext4_set_inode_flags(inode);
unlock_new_inode(inode);
return inode;