diff options
| author | 王贇 <[email protected]> | 2021-08-26 11:42:42 +0800 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2021-08-26 12:20:47 +0100 |
| commit | 733c99ee8be9a1410287cdbb943887365e83b2d6 (patch) | |
| tree | d70788577b4e957040713a11dc5442d6e981ea58 /net/lapb/lapb_timer.c | |
| parent | 96a6b93b69880b2c978e1b2be9cae6970b605008 (diff) | |
net: fix NULL pointer reference in cipso_v4_doi_free
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 <[email protected]>
Signed-off-by: Michael Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions