================================================================== BUG: KCSAN: data-race in prandom_seed / prandom_u32 write to 0xffff888237d28858 of 8 bytes by interrupt on cpu 1: siprand_u32 lib/random32.c:372 [inline] prandom_u32+0x12f/0x190 lib/random32.c:387 garp_join_timer_arm net/802/garp.c:410 [inline] garp_join_timer+0xea/0x120 net/802/garp.c:424 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1421 expire_timers+0x116/0x240 kernel/time/timer.c:1466 __run_timers+0x350/0x400 kernel/time/timer.c:1737 run_timer_softirq+0x2e/0x60 kernel/time/timer.c:1750 __do_softirq+0x158/0x2e3 kernel/softirq.c:558 __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0x41/0x70 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 kcsan_setup_watchpoint+0x3e9/0x3f0 kernel/kcsan/core.c:694 vma_pages include/linux/mm.h:2822 [inline] vma_last_pgoff mm/interval_tree.c:20 [inline] vma_interval_tree_insert+0x35/0x1e0 mm/interval_tree.c:23 __vma_adjust+0x5dc/0x2000 mm/mmap.c:896 __split_vma+0x240/0x320 __do_munmap+0x297/0x11b0 mm/mmap.c:2823 __vm_munmap mm/mmap.c:2883 [inline] vm_munmap+0x92/0x150 mm/mmap.c:2901 elf_map+0x19f/0x240 fs/binfmt_elf.c:392 load_elf_binary+0xbaa/0x1970 fs/binfmt_elf.c:1166 search_binary_handler fs/exec.c:1726 [inline] exec_binprm+0x1d9/0x800 fs/exec.c:1767 bprm_execve+0x379/0x4e0 fs/exec.c:1836 kernel_execve+0x62b/0x660 fs/exec.c:1997 call_usermodehelper_exec_async+0x1a6/0x250 kernel/umh.c:112 ret_from_fork+0x1f/0x30 read to 0xffff888237d28858 of 8 bytes by task 8041 on cpu 0: prandom_seed+0xeb/0x270 lib/random32.c:440 __inet_insert_ifa+0x3a6/0x600 net/ipv4/devinet.c:540 inet_rtm_newaddr+0x854/0xb40 net/ipv4/devinet.c:962 rtnetlink_rcv_msg+0x74f/0x7e0 net/core/rtnetlink.c:5993 netlink_rcv_skb+0x13e/0x240 net/netlink/af_netlink.c:2503 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:2040 __do_sys_sendto net/socket.c:2052 [inline] __se_sys_sendto net/socket.c:2048 [inline] __x64_sys_sendto+0x74/0x90 net/socket.c:2048 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: 0x9890e89bdf3fef87 -> 0x70e76d0f9a5a11af Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8041 Comm: syz-executor.1 Not tainted 5.18.0-rc6-syzkaller-00007-g9be9ed2612b5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network 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: 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! 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! batman_adv: batadv0: Interface activated: batadv_slave_0 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! 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: batadv0: Interface activated: batadv_slave_1