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| author | Li Zefan <lizf@cn.fujitsu.com> | 2012-03-12 09:39:48 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2012-04-18 19:22:18 +0200 |
| commit | cdc6a3952558f00b1bc3b6401e1cf98797632fe2 (patch) | |
| tree | b97cf714429b439c6887b2fe0acf9065e1d09f1f /fs/btrfs/backref.c | |
| parent | Btrfs: retrurn void from clear_state_bit (diff) | |
| download | linux-cdc6a3952558f00b1bc3b6401e1cf98797632fe2.tar.xz linux-cdc6a3952558f00b1bc3b6401e1cf98797632fe2.zip | |
Btrfs: avoid possible use-after-free in clear_extent_bit()
clear_extent_bit()
{
next_node = rb_next(&state->rb_node);
...
clear_state_bit(state); <-- this may free next_node
if (next_node) {
state = rb_entry(next_node);
...
}
}
clear_state_bit() calls merge_state() which may free the next node
of the passing extent_state, so clear_extent_bit() may end up
referencing freed memory.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions