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Commit f1e3c289 authored Jun 11, 2014 by Sasha Levin Committed by Chris Mason Jun 13, 2014

btrfs: prevent RCU warning when dereferencing radix tree slot



Mark the dereference as protected by lock. Not doing so triggers
an RCU warning since the radix tree assumed that RCU is in use.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>

parent 5fbc7c59

fs/btrfs/tests/btrfs-tests.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -135,7 +135,7 @@ static void btrfs_free_dummy_fs_info(struct btrfs_fs_info *fs_info)
		radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
		struct extent_buffer *eb;

		eb = radix_tree_deref_slot(slot);
		eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
		if (!eb)
		continue;
		/* Shouldn't happen but that kind of thinking creates CVE's */