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authorMatthew Wilcox <mawilcox@microsoft.com>2016-12-15 02:08:46 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-15 03:04:10 +0300
commitb35df27a39f40e39fabf1b1e9569c7b24e1add6a (patch)
tree71087099c9e8ef10d8a1475815633ded88c2c03c /fs/btrfs
parent218ed7503aee07c7758dcbdd782e8c1a25c9f1e9 (diff)
downloadlinux-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>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/tests/btrfs-tests.c1
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);