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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-28 02:45:45 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-28 02:45:45 +0300
commit80e0c505b22e64ab1787285b182a1e8395e53991 (patch)
treeea854bf26485574860ff0cc18245e4645ccc5d0d /fs/btrfs/file.c
parent7e4b9359f483fe270c176cc37aaad54d5d1b6a1c (diff)
parentdba72cb30b6a4811038128c8a98b268d18ca60fe (diff)
downloadlinux-80e0c505b22e64ab1787285b182a1e8395e53991.tar.xz
Merge branch 'for-linus-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason: "This has Mark Fasheh's patches to fix quota accounting during subvol deletion, which we've been working on for a while now. The patch is pretty small but it's a key fix. Otherwise it's a random assortment" * 'for-linus-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: btrfs: fix balance range usage filters in 4.4-rc btrfs: qgroup: account shared subtree during snapshot delete Btrfs: use btrfs_get_fs_root in resolve_indirect_ref btrfs: qgroup: fix quota disable during rescan Btrfs: fix race between cleaner kthread and space cache writeout Btrfs: fix scrub preventing unused block groups from being deleted Btrfs: fix race between scrub and block group deletion btrfs: fix rcu warning during device replace btrfs: Continue replace when set_block_ro failed btrfs: fix clashing number of the enhanced balance usage filter Btrfs: fix the number of transaction units needed to remove a block group Btrfs: use global reserve when deleting unused block group after ENOSPC Btrfs: tests: checking for NULL instead of IS_ERR() btrfs: fix signed overflows in btrfs_sync_file
Diffstat (limited to 'fs/btrfs/file.c')
-rw-r--r--fs/btrfs/file.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 977e715f0bf2..72e73461c064 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1882,8 +1882,13 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
struct btrfs_log_ctx ctx;
int ret = 0;
bool full_sync = 0;
- const u64 len = end - start + 1;
+ u64 len;
+ /*
+ * The range length can be represented by u64, we have to do the typecasts
+ * to avoid signed overflow if it's [0, LLONG_MAX] eg. from fsync()
+ */
+ len = (u64)end - (u64)start + 1;
trace_btrfs_sync_file(file, datasync);
/*
@@ -2071,8 +2076,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
}
}
if (!full_sync) {
- ret = btrfs_wait_ordered_range(inode, start,
- end - start + 1);
+ ret = btrfs_wait_ordered_range(inode, start, len);
if (ret) {
btrfs_end_transaction(trans, root);
goto out;