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| Started by | Matthew Wilcox <mawilcox@linuxonhyperv.com> |
|---|---|
| First post | 2016-11-28 21:10 +0100 |
| Last post | 2016-11-28 21:10 +0100 |
| Articles | 1 — 1 participant |
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[PATCH v3 19/33] btrfs: Fix race in btrfs_free_dummy_fs_info() Matthew Wilcox <mawilcox@linuxonhyperv.com> - 2016-11-28 21:10 +0100
| From | Matthew Wilcox <mawilcox@linuxonhyperv.com> |
|---|---|
| Date | 2016-11-28 21:10 +0100 |
| Subject | [PATCH v3 19/33] btrfs: Fix race in btrfs_free_dummy_fs_info() |
| Message-ID | <sIAps-6LC-11@gated-at.bofh.it> |
From: Matthew Wilcox <mawilcox@microsoft.com> 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. Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> --- fs/btrfs/tests/btrfs-tests.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c index bf62ad9..73076a0 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); -- 2.10.2
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