提交 f5d9e08b 编写于 作者: J Joe Thornber 提交者: Zheng Zengkai

dm btree remove: fix use after free in rebalance_children()

stable inclusion
from stable-v5.10.88
commit 0e21e6cd5eebfc929ac5fa3b97ca2d4ace3cb6a3
bugzilla: 186058 https://gitee.com/openeuler/kernel/issues/I4QW6A

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0e21e6cd5eebfc929ac5fa3b97ca2d4ace3cb6a3

--------------------------------

commit 1b8d2789 upstream.

Move dm_tm_unlock() after dm_tm_dec().

Cc: stable@vger.kernel.org
Signed-off-by: NJoe Thornber <ejt@redhat.com>
Signed-off-by: NMike Snitzer <snitzer@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
上级 2c2ffb11
......@@ -423,9 +423,9 @@ static int rebalance_children(struct shadow_spine *s,
memcpy(n, dm_block_data(child),
dm_bm_block_size(dm_tm_get_bm(info->tm)));
dm_tm_unlock(info->tm, child);
dm_tm_dec(info->tm, dm_block_location(child));
dm_tm_unlock(info->tm, child);
return 0;
}
......
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