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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2018-08-07 12:41:38 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-22 07:48:35 +0200 |
| commit | 813fb06fe60d0a56a5481fb81793142fc00bf4bd (patch) | |
| tree | 7f36db7fda6670d11e46c4f0d940b287370831fe /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 4aef9b0fffd2295b1c523ebf43ca6b46e9cc8ffa (diff) | |
llc: use refcount_inc_not_zero() for llc_sap_find()
[ Upstream commit 0dcb82254d65f72333aa50ad626d1e9665ad093b ]
llc_sap_put() decreases the refcnt before deleting sap
from the global list. Therefore, there is a chance
llc_sap_find() could find a sap with zero refcnt
in this global list.
Close this race condition by checking if refcnt is zero
or not in llc_sap_find(), if it is zero then it is being
removed so we can just treat it as gone.
Reported-by: <syzbot+278893f3f7803871f7ce@syzkaller.appspotmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions