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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-07-22 01:42:03 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-07-22 01:42:03 +0200 |
| commit | 55b636b419a269e167f7d6a9265e5e316a89cd5f (patch) | |
| tree | 3cd695a0d880bcb0dd8212dadb181c8f8426fc7a | |
| parent | mm: make vm_area_alloc() initialize core fields (diff) | |
| parent | Btrfs: fix file data corruption after cloning a range and fsync (diff) | |
| download | linux-55b636b419a269e167f7d6a9265e5e316a89cd5f.tar.xz linux-55b636b419a269e167f7d6a9265e5e316a89cd5f.zip | |
Merge tag 'for-4.18-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fix from David Sterba:
"A fix of a corruption regarding fsync and clone, under some very
specific conditions explained in the patch.
The fix is marked for stable 3.16+ so I'd like to get it merged now
given the impact"
* tag 'for-4.18-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix file data corruption after cloning a range and fsync
| -rw-r--r-- | fs/btrfs/extent_io.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index e55843f536bc..b3e45714d28f 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -4238,8 +4238,9 @@ int try_release_extent_mapping(struct page *page, gfp_t mask) struct extent_map *em; u64 start = page_offset(page); u64 end = start + PAGE_SIZE - 1; - struct extent_io_tree *tree = &BTRFS_I(page->mapping->host)->io_tree; - struct extent_map_tree *map = &BTRFS_I(page->mapping->host)->extent_tree; + struct btrfs_inode *btrfs_inode = BTRFS_I(page->mapping->host); + struct extent_io_tree *tree = &btrfs_inode->io_tree; + struct extent_map_tree *map = &btrfs_inode->extent_tree; if (gfpflags_allow_blocking(mask) && page->mapping->host->i_size > SZ_16M) { @@ -4262,6 +4263,8 @@ int try_release_extent_mapping(struct page *page, gfp_t mask) extent_map_end(em) - 1, EXTENT_LOCKED | EXTENT_WRITEBACK, 0, NULL)) { + set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &btrfs_inode->runtime_flags); remove_extent_mapping(map, em); /* once for the rb tree */ free_extent_map(em); |