WARNING: can't dereference registers at ADDR for ip retint_user

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 47cbf4cc Linux 4.14.211
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1483d00f500000
kernel config: https://syzkaller.appspot.com/x/.config?x=fdd708417c3f7d5b
dashboard link: https://syzkaller.appspot.com/bug?extid=c5c936d9bbe009e6d6aa
compiler: gcc (GCC) 10.1.0-syz 20200507

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c5c936...@syzkaller.appspotmail.com

WARNING: can't dereference registers at 0000000000000321 for ip retint_user+0x8/0x18
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready
batman_adv: batadv0: Interface activated: batadv_slave_0
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
batman_adv: batadv0: Interface activated: batadv_slave_1
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
(unnamed net_device) (uninitialized): option miimon: invalid value (18446744073709551615)
(unnamed net_device) (uninitialized): option miimon: allowed values 0 - 2147483647
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.