watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.6:4491] Modules linked in: irq event stamp: 5015511 hardirqs last enabled at (5015510): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5015511): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (5005848): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5005851): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4491 Comm: syz-executor.6 Not tainted 5.10.223 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:load_balance+0x1f83/0x29d0 kernel/sched/fair.c:9896 Code: f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c2 04 00 00 48 8b 44 24 68 83 84 98 80 00 00 00 01 e9 72 f6 ff ff 0f 1f 44 00 00 c0 f5 ff ff 48 8b 44 24 68 8b 5c 24 3c 48 8d bc 98 b0 00 00 00 RSP: 0018:ffff88806ce09cb8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffed1001103882 RCX: 0000000000017324 RDX: 1ffff1100d9c13bb RSI: 0000000000000005 RDI: ffff88806ce09dd8 RBP: ffff88806ce09e80 R08: 0000000000000000 R09: ffffffff8567580f R10: fffffbfff0aceb01 R11: 0000000000000001 R12: ffff88800881c400 R13: ffff88806ce09da8 R14: 0000000000000007 R15: 0000000000000040 FS: 00007f13b164c700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005622c1b45628 CR3: 000000004a1f2000 CR4: 0000000000350ef0 Call Trace: rebalance_domains+0x690/0xe40 kernel/sched/fair.c:10320 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:fib_table_lookup+0xbe9/0x2430 net/ipv4/fib_trie.c:1577 Code: 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e ea 17 00 00 48 8b 54 24 38 41 8b 1e 48 b8 00 00 00 00 00 fc ff df <48> c1 ea 03 0f cb 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 4a 16 00 00 RSP: 0018:ffff88804763f178 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 00000000ac141400 RCX: ffffc90001dfa000 RDX: ffff88804763f318 RSI: ffffffff8355d076 RDI: 0000000000000005 RBP: ffff88800daf3a80 R08: 0000000000000001 R09: ffffffff868686e7 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800daf3a00 R13: dffffc0000000000 R14: ffff88801e12e120 R15: 000000004763f501 fib_lookup.constprop.0+0x13f/0x4e0 include/net/ip_fib.h:380 ip_route_output_key_hash_rcu+0xdd4/0x2a90 net/ipv4/route.c:2674 ip_route_output_key_hash+0x18d/0x340 net/ipv4/route.c:2564 __ip_route_output_key include/net/route.h:126 [inline] ip_route_output_flow+0x23/0x150 net/ipv4/route.c:2796 udp_sendmsg+0x16f2/0x2160 net/ipv4/udp.c:1231 udpv6_sendmsg+0x1b30/0x2ad0 net/ipv6/udp.c:1369 inet6_sendmsg+0x105/0x140 net/ipv6/af_inet6.c:663 sock_sendmsg_nosec net/socket.c:651 [inline] __sock_sendmsg+0xf2/0x190 net/socket.c:663 ____sys_sendmsg+0x334/0x870 net/socket.c:2378 ___sys_sendmsg+0xf3/0x170 net/socket.c:2432 __sys_sendmmsg+0x195/0x470 net/socket.c:2518 __do_sys_sendmmsg net/socket.c:2547 [inline] __se_sys_sendmmsg net/socket.c:2544 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2544 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f13b40d6b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f13b164c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f13b41e9f60 RCX: 00007f13b40d6b19 RDX: 000000000000002f RSI: 0000000020004d00 RDI: 0000000000000003 RBP: 00007f13b4130f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc850d85af R14: 00007f13b164c300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 114 Comm: systemd-udevd Not tainted 5.10.223 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:arch_is_kernel_initmem_freed arch/x86/include/asm/sections.h:34 [inline] RIP: 0010:static_obj+0x50/0xc0 kernel/locking/lockdep.c:794 Code: 87 48 39 e8 0f 97 c3 48 83 3d 1b 34 c2 03 00 75 2a 48 c7 c0 c0 39 e8 84 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 <75> 5e 48 3b 2d b7 33 c2 03 72 06 31 c0 84 db 75 12 48 81 fd 00 00 RSP: 0018:ffff88800ce2f968 EFLAGS: 00000246 RAX: 1ffffffff09d0738 RBX: ffffffff86bf5901 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff844e48a0 RDI: ffffffff86c121e0 RBP: ffffffff86c121e0 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff86c121e0 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88800f62a280 FS: 00007f280ccc28c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe7c9444998 CR3: 0000000009116000 CR4: 0000000000350ee0 Call Trace: lockdep_init_map_type+0x2c7/0x780 kernel/locking/lockdep.c:4738 lockdep_init_map_waits include/linux/lockdep.h:195 [inline] lockdep_init_map_wait include/linux/lockdep.h:202 [inline] __raw_spin_lock_init+0x36/0x110 kernel/locking/spinlock_debug.c:24 create_object.isra.0+0x11a/0xa20 mm/kmemleak.c:588 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x159/0x310 mm/slub.c:2909 kmem_cache_zalloc include/linux/slab.h:654 [inline] __alloc_file+0x21/0x320 fs/file_table.c:101 alloc_empty_file+0x6d/0x170 fs/file_table.c:151 path_openat+0xe6/0x2770 fs/namei.c:3411 do_filp_open+0x190/0x3e0 fs/namei.c:3452 do_sys_openat2+0x171/0x4d0 fs/open.c:1227 do_sys_open fs/open.c:1243 [inline] __do_sys_openat fs/open.c:1259 [inline] __se_sys_openat fs/open.c:1254 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1254 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f280d171d62 Code: c0 f6 c2 40 75 52 89 d0 45 31 d2 25 00 00 41 00 3d 00 00 41 00 74 41 64 8b 04 25 18 00 00 00 85 c0 75 65 b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 a2 00 00 00 48 8b 4c 24 38 64 48 2b 0c 25 RSP: 002b:00007ffca07993f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f280d171d62 RDX: 00000000002a0000 RSI: 00005622c1b70fd1 RDI: 0000000000000011 RBP: 00005622c1b70fd0 R08: 00005622bf3928f0 R09: 00007f280d241be0 R10: 0000000000000000 R11: 0000000000000246 R12: 00005622c1b7435c R13: 0000000000000011 R14: 0000000000000008 R15: 00005622c1b70fd1 ---------------- Code disassembly (best guess): 0: f8 clc 1: 83 e0 07 and $0x7,%eax 4: 83 c0 03 add $0x3,%eax 7: 38 d0 cmp %dl,%al 9: 7c 08 jl 0x13 b: 84 d2 test %dl,%dl d: 0f 85 c2 04 00 00 jne 0x4d5 13: 48 8b 44 24 68 mov 0x68(%rsp),%rax 18: 83 84 98 80 00 00 00 addl $0x1,0x80(%rax,%rbx,4) 1f: 01 20: e9 72 f6 ff ff jmpq 0xfffff697 25: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) * 2a: e9 c0 f5 ff ff jmpq 0xfffff5ef <-- trapping instruction 2f: 48 8b 44 24 68 mov 0x68(%rsp),%rax 34: 8b 5c 24 3c mov 0x3c(%rsp),%ebx 38: 48 8d bc 98 b0 00 00 lea 0xb0(%rax,%rbx,4),%rdi 3f: 00