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| author | 王贇 <yun.wang@linux.alibaba.com> | 2021-08-30 18:28:01 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-22 11:41:26 +0200 |
| commit | 0587d1e6f8d03cb479336a166b988c464420fede (patch) | |
| tree | d9e8346ddc5c807843173ee8cf17a345fb3ae902 /net/unix/af_unix.c | |
| parent | f41f0adde4178b1b68ff004cba7e2038debb7b13 (diff) | |
net: fix NULL pointer reference in cipso_v4_doi_free
[ Upstream commit 733c99ee8be9a1410287cdbb943887365e83b2d6 ]
In netlbl_cipsov4_add_std() when 'doi_def->map.std' alloc
failed, we sometime observe panic:
BUG: kernel NULL pointer dereference, address:
...
RIP: 0010:cipso_v4_doi_free+0x3a/0x80
...
Call Trace:
netlbl_cipsov4_add_std+0xf4/0x8c0
netlbl_cipsov4_add+0x13f/0x1b0
genl_family_rcv_msg_doit.isra.15+0x132/0x170
genl_rcv_msg+0x125/0x240
This is because in cipso_v4_doi_free() there is no check
on 'doi_def->map.std' when 'doi_def->type' equal 1, which
is possibe, since netlbl_cipsov4_add_std() haven't initialize
it before alloc 'doi_def->map.std'.
This patch just add the check to prevent panic happen for similar
cases.
Reported-by: Abaci <abaci@linux.alibaba.com>
Signed-off-by: Michael Wang <yun.wang@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions