x_tables: duplicate underflow at hook 4 ================================================================== BUG: KMSAN: uninit-value in __hlist_del include/linux/list.h:703 [inline] BUG: KMSAN: uninit-value in detach_timer kernel/time/timer.c:816 [inline] BUG: KMSAN: uninit-value in expire_timers kernel/time/timer.c:1352 [inline] BUG: KMSAN: uninit-value in __run_timers+0xc85/0x11d0 kernel/time/timer.c:1681 CPU: 1 PID: 10661 Comm: udevd Not tainted 5.0.0-rc1+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x173/0x1d0 lib/dump_stack.c:113 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313 __hlist_del include/linux/list.h:703 [inline] detach_timer kernel/time/timer.c:816 [inline] expire_timers kernel/time/timer.c:1352 [inline] __run_timers+0xc85/0x11d0 kernel/time/timer.c:1681 run_timer_softirq+0x2e/0x50 kernel/time/timer.c:1694 __do_softirq+0x53f/0x93a kernel/softirq.c:293 invoke_softirq kernel/softirq.c:375 [inline] irq_exit+0x214/0x250 kernel/softirq.c:416 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1064 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:814 RIP: 0010:kmsan_get_metadata_or_null+0x1/0x320 mm/kmsan/kmsan.c:766 Code: 01 f8 e9 66 fc ff ff 49 81 ff ff ff ff 1f 0f 87 53 ff ff ff 48 8b 34 25 10 90 c3 8b 4c 01 fe e9 41 fe ff ff 0f 1f 44 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 41 89 d6 49 bd 00 00 00 00 80 RSP: 0018:ffff888178bff170 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000002 RBX: 0000000000000004 RCX: 0000000000000004 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888178bff25c RBP: ffff888178bff210 R08: 0000000000000002 R09: ffff888178bff1c8 R10: ffffffffffffffff R11: 0000000000000000 R12: ffff888178bff25c R13: 0000000000000005 R14: 0000000000000002 R15: 00000000894000ac page_remove_rmap+0x85/0xec0 mm/rmap.c:1301 zap_pte_range mm/memory.c:1091 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x1f37/0x3f20 mm/memory.c:1264 unmap_single_vma+0x43f/0x5e0 mm/memory.c:1309 unmap_vmas+0x321/0x440 mm/memory.c:1340 exit_mmap+0x50e/0xa00 mm/mmap.c:3140 __mmput+0x159/0x5f0 kernel/fork.c:1048 mmput+0xb9/0x110 kernel/fork.c:1069 exec_mmap fs/exec.c:1046 [inline] flush_old_exec+0xdea/0x21b0 fs/exec.c:1279 load_elf_binary+0x10a3/0x85b0 fs/binfmt_elf.c:869 search_binary_handler+0x2db/0xab0 fs/exec.c:1656 exec_binprm fs/exec.c:1698 [inline] __do_execve_file+0x2440/0x3010 fs/exec.c:1818 do_execveat_common fs/exec.c:1865 [inline] do_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1963 [inline] __se_sys_execve+0xec/0x110 fs/exec.c:1958 __x64_sys_execve+0x4a/0x70 fs/exec.c:1958 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x7fb9fef73207 Code: Bad RIP value. RSP: 002b:00007fffbafac708 EFLAGS: 00000202 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fb9fef73207 RDX: 00000000020cd850 RSI: 00007fffbafac800 RDI: 00007fffbafad810 RBP: 0000000000625500 R08: 00000000000025e9 R09: 00000000000025e9 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000020cd850 R13: 0000000000000007 R14: 00000000020bc250 R15: 0000000000000005 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:205 [inline] kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:159 kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:185 slab_post_alloc_hook mm/slab.h:446 [inline] slab_alloc_node mm/slub.c:2754 [inline] slab_alloc mm/slub.c:2762 [inline] __kmalloc_track_caller+0xaa8/0xc70 mm/slub.c:4347 kmemdup+0x7a/0xf0 mm/util.c:111 __devinet_sysctl_register+0xe4/0x780 net/ipv4/devinet.c:2472 devinet_sysctl_register+0x2ef/0x3a0 net/ipv4/devinet.c:2524 inetdev_init+0x54e/0xa00 net/ipv4/devinet.c:274 inetdev_event+0x417/0x1d80 net/ipv4/devinet.c:1480 notifier_call_chain kernel/notifier.c:93 [inline] __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x13d/0x240 kernel/notifier.c:401 call_netdevice_notifiers_info net/core/dev.c:1739 [inline] call_netdevice_notifiers_extack net/core/dev.c:1751 [inline] call_netdevice_notifiers net/core/dev.c:1765 [inline] register_netdevice+0x210d/0x2660 net/core/dev.c:8658 veth_newlink+0x10e4/0x13b0 drivers/net/veth.c:1298 __rtnl_newlink net/core/rtnetlink.c:3182 [inline] rtnl_newlink+0x2944/0x37a0 net/core/rtnetlink.c:3240 rtnetlink_rcv_msg+0x115b/0x1550 net/core/rtnetlink.c:5130 netlink_rcv_skb+0x431/0x620 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5148 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0xf3e/0x1020 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x127f/0x1300 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] __sys_sendto+0x8c4/0xac0 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:1796 __x64_sys_sendto+0x6e/0x90 net/socket.c:1796 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ==================================================================