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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2018-12-29 13:56:36 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-12-30 14:07:54 -0800 |
| commit | c433570458e49bccea5c551df628d058b3526289 (patch) | |
| tree | 05427f71af7a74fb15b0eb08f138cc6004a225c1 /kernel | |
| parent | 7f334a7e1ae113212e39aafba51352ea9ab8c9f9 (diff) | |
| download | linux-c433570458e49bccea5c551df628d058b3526289.tar.bz2 | |
ax25: fix a use-after-free in ax25_fillin_cb()
There are multiple issues here:
1. After freeing dev->ax25_ptr, we need to set it to NULL otherwise
we may use a dangling pointer.
2. There is a race between ax25_setsockopt() and device notifier as
reported by syzbot. Close it by holding RTNL lock.
3. We need to test if dev->ax25_ptr is NULL before using it.
Reported-and-tested-by: syzbot+ae6bb869cbed29b29040@syzkaller.appspotmail.com
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions