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| author | Taras Chornyi <taras.chornyi@plvision.eu> | 2020-04-09 20:25:24 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-04-09 10:27:23 -0700 |
| commit | 690cc86321eb9bcee371710252742fb16fe96824 (patch) | |
| tree | ddd23ff4c47164043fe9052222492700ba6602d2 /net/core | |
| parent | 2fabef4f65b46b261434a27ecdce291b63de8522 (diff) | |
| download | linux-690cc86321eb9bcee371710252742fb16fe96824.tar.bz2 | |
net: ipv4: devinet: Fix crash when add/del multicast IP with autojoin
When CONFIG_IP_MULTICAST is not set and multicast ip is added to the device
with autojoin flag or when multicast ip is deleted kernel will crash.
steps to reproduce:
ip addr add 224.0.0.0/32 dev eth0
ip addr del 224.0.0.0/32 dev eth0
or
ip addr add 224.0.0.0/32 dev eth0 autojoin
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088
pc : _raw_write_lock_irqsave+0x1e0/0x2ac
lr : lock_sock_nested+0x1c/0x60
Call trace:
_raw_write_lock_irqsave+0x1e0/0x2ac
lock_sock_nested+0x1c/0x60
ip_mc_config.isra.28+0x50/0xe0
inet_rtm_deladdr+0x1a8/0x1f0
rtnetlink_rcv_msg+0x120/0x350
netlink_rcv_skb+0x58/0x120
rtnetlink_rcv+0x14/0x20
netlink_unicast+0x1b8/0x270
netlink_sendmsg+0x1a0/0x3b0
____sys_sendmsg+0x248/0x290
___sys_sendmsg+0x80/0xc0
__sys_sendmsg+0x68/0xc0
__arm64_sys_sendmsg+0x20/0x30
el0_svc_common.constprop.2+0x88/0x150
do_el0_svc+0x20/0x80
el0_sync_handler+0x118/0x190
el0_sync+0x140/0x180
Fixes: 93a714d6b53d ("multicast: Extend ip address command to enable multicast group join/leave on")
Signed-off-by: Taras Chornyi <taras.chornyi@plvision.eu>
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
0 files changed, 0 insertions, 0 deletions