diff options
| author | Matthew Wilcox <mawilcox@microsoft.com> | 2016-12-15 02:08:46 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-15 03:04:10 +0300 |
| commit | b35df27a39f40e39fabf1b1e9569c7b24e1add6a (patch) | |
| tree | 71087099c9e8ef10d8a1475815633ded88c2c03c | |
| parent | 218ed7503aee07c7758dcbdd782e8c1a25c9f1e9 (diff) | |
| download | linux-b35df27a39f40e39fabf1b1e9569c7b24e1add6a.tar.xz | |
btrfs: fix race in btrfs_free_dummy_fs_info()
We drop the lock which protects the radix tree, so we must call
radix_tree_iter_next() in order to avoid a modification to the tree
invalidating the iterator state.
Link: http://lkml.kernel.org/r/1480369871-5271-54-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/btrfs/tests/btrfs-tests.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c index bf62ad919a95..73076a0ea6a9 100644 --- a/fs/btrfs/tests/btrfs-tests.c +++ b/fs/btrfs/tests/btrfs-tests.c @@ -162,6 +162,7 @@ void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info) slot = radix_tree_iter_retry(&iter); continue; } + slot = radix_tree_iter_next(&iter); spin_unlock(&fs_info->buffer_lock); free_extent_buffer_stale(eb); spin_lock(&fs_info->buffer_lock); |