netdevsim netdevsim1 netdevsim1: renamed from eth1
netdevsim netdevsim1 netdevsim2: renamed from eth2
netdevsim netdevsim1 netdevsim3: renamed from eth3
==================================================================
BUG: KCSAN: data-race in prandom_seed / prandom_u32

write to 0xffff888237c28860 of 8 bytes by task 1439 on cpu 0:
 siprand_u32 lib/random32.c:372 [inline]
 prandom_u32+0x13e/0x190 lib/random32.c:387
 shmem_get_inode+0x2d4/0x6e0 mm/shmem.c:2267
 shmem_mknod+0x3b/0x160 mm/shmem.c:2823
 shmem_create+0x2f/0x40 mm/shmem.c:2886
 lookup_open fs/namei.c:3330 [inline]
 open_last_lookups fs/namei.c:3400 [inline]
 path_openat+0xc50/0x1b30 fs/namei.c:3606
 do_filp_open+0x105/0x220 fs/namei.c:3636
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1213
 do_sys_open fs/open.c:1229 [inline]
 __do_sys_openat fs/open.c:1245 [inline]
 __se_sys_openat fs/open.c:1240 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1240
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888237c28860 of 8 bytes by task 1821 on cpu 1:
 prandom_seed+0x103/0x270 lib/random32.c:440
 __inet_insert_ifa+0x3a6/0x600 net/ipv4/devinet.c:540
 inet_insert_ifa net/ipv4/devinet.c:563 [inline]
 inetdev_event+0x8c0/0xa80 net/ipv4/devinet.c:1576
 notifier_call_chain kernel/notifier.c:84 [inline]
 raw_notifier_call_chain+0x53/0xb0 kernel/notifier.c:392
 __dev_notify_flags+0x1d6/0x3a0
 dev_change_flags+0xa2/0xc0 net/core/dev.c:8509
 do_setlink+0x7f9/0x2120 net/core/rtnetlink.c:2731
 __rtnl_newlink net/core/rtnetlink.c:3416 [inline]
 rtnl_newlink+0x1116/0x1580 net/core/rtnetlink.c:3531
 rtnetlink_rcv_msg+0x74f/0x7e0 net/core/rtnetlink.c:5993
 netlink_rcv_skb+0x13e/0x240 net/netlink/af_netlink.c:2502
 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:6011
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x58a/0x660 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x661/0x750 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 __sys_sendto+0x21e/0x2c0 net/socket.c:2072
 __do_sys_sendto net/socket.c:2084 [inline]
 __se_sys_sendto net/socket.c:2080 [inline]
 __x64_sys_sendto+0x74/0x90 net/socket.c:2080
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x63199ae5ef1d32ec -> 0xe3e5a68eb3e53eb8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1821 Comm: syz-executor.1 Not tainted 5.18.0-syzkaller-00511-g140e40e39a29-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
8021q: adding VLAN 0 to HW filter on device bond0
8021q: adding VLAN 0 to HW filter on device team0
hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
8021q: adding VLAN 0 to HW filter on device batadv0
device veth0_vlan entered promiscuous mode
device veth1_vlan entered promiscuous mode
device veth0_macvtap entered promiscuous mode
device veth1_macvtap entered promiscuous mode
batman_adv: batadv0: Interface activated: batadv_slave_0
batman_adv: batadv0: Interface activated: batadv_slave_1
netdevsim netdevsim1 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim1 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim1 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim1 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0