watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.1.94:5570] Modules linked in: irq event stamp: 12044473 hardirqs last enabled at (12044472): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (12044473): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1037 softirqs last enabled at (10905660): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (10905660): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (10905660): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (10905663): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (10905663): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (10905663): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 0 UID: 0 PID: 5570 Comm: syz.1.94 Not tainted 6.11.0-syzkaller-10557-gb24d7f0da6ef #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:lock_is_held_type+0x13b/0x190 Code: 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 42 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90000006f08 EFLAGS: 00000206 RAX: a3bfe8d631aba100 RBX: 0000000000000000 RCX: ffff88802a1c0000 RDX: 0000000000000100 RSI: ffffffff8c0adbc0 RDI: ffffffff8c6100a0 RBP: 0000000000000006 R08: ffffffff8a6a1e3f R09: ffffc90000007290 R10: ffffc90000007280 R11: fffff52000000e1e R12: 0000000000000246 R13: ffff88802a1c0000 R14: 00000000ffffffff R15: ffffffff8fcd18c8 FS: 00007fc706ce96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c31f97c CR3: 0000000020ba6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:249 [inline] lockdep_rtnl_is_held+0x1b/0x40 net/core/rtnetlink.c:177 __in6_dev_get include/net/addrconf.h:330 [inline] ip6_ignore_linkdown include/net/addrconf.h:421 [inline] find_match+0xd8/0xc10 net/ipv6/route.c:744 __find_rr_leaf+0x275/0x8e0 net/ipv6/route.c:832 find_rr_leaf net/ipv6/route.c:853 [inline] rt6_select net/ipv6/route.c:897 [inline] fib6_table_lookup+0x413/0xbb0 net/ipv6/route.c:2195 ip6_pol_route+0x273/0x15d0 net/ipv6/route.c:2231 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x58c/0x790 net/ipv6/fib6_rules.c:117 ip6_route_input_lookup net/ipv6/route.c:2300 [inline] ip6_route_input+0x859/0xd90 net/ipv6/route.c:2596 ip6_rcv_finish+0x144/0x180 net/ipv6/ip6_input.c:77 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5662 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5775 process_backlog+0x662/0x15b0 net/core/dev.c:6107 __napi_poll+0xcb/0x490 net/core/dev.c:6771 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6962 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x468/0x550 Code: fd ff ff 48 89 df e8 e7 4a 8e 00 e9 fe fc ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 33 ff ff ff e8 bd 4b 8e 00 e9 29 ff ff ff 0f 1e fa 45 89 f7 65 8b 05 16 be 93 7e 83 f8 08 0f 83 bf 00 00 RSP: 0018:ffffc9000999ec00 EFLAGS: 00000a06 RAX: f2f2f200f1f1f1f1 RBX: ffffffff8e318a50 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b8637eb8 RBP: ffffc9000999ed48 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff940002aaed7 R12: 1ffff92001333d88 R13: dffffc0000000000 R14: 0000000000000000 R15: 00000000555da867 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] __folio_batch_add_and_move+0x279/0xf00 mm/swap.c:237 wp_page_copy mm/memory.c:3421 [inline] do_wp_page+0x1c37/0x52d0 mm/memory.c:3745 handle_pte_fault+0x10e3/0x6800 mm/memory.c:5767 __handle_mm_fault mm/memory.c:5894 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6062 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71 Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1 RSP: 0018:ffffc9000999f738 EFLAGS: 00050206 RAX: ffffffff84b91401 RBX: 0000000020132670 RCX: 000000000000a840 RDX: 0000000000000000 RSI: ffff8880551c5a78 RDI: 0000000020138000 RBP: ffffc9000999f8b8 R08: ffff8880551d02b7 R09: 1ffff1100aa3a056 R10: dffffc0000000000 R11: ffffed100aa3a057 R12: 00000000000101d0 R13: ffff8880551c00e8 R14: ffffc9000999fe18 R15: 1ffff92001333fc3 copy_user_generic arch/x86/include/asm/uaccess_64.h:121 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:142 [inline] copy_to_user_iter lib/iov_iter.c:25 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x257/0x1d60 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:211 [inline] simple_copy_to_iter net/core/datagram.c:524 [inline] __skb_datagram_iter+0x107/0x900 net/core/datagram.c:401 skb_copy_datagram_iter+0xd1/0x250 net/core/datagram.c:538 skb_copy_datagram_msg include/linux/skbuff.h:4076 [inline] tipc_recvstream+0x7a8/0xf80 net/tipc/socket.c:2067 sock_recvmsg_nosec net/socket.c:1052 [inline] sock_recvmsg+0x22f/0x280 net/socket.c:1074 ____sys_recvmsg+0x1c6/0x480 net/socket.c:2822 ___sys_recvmsg net/socket.c:2864 [inline] __sys_recvmsg+0x2e6/0x3d0 net/socket.c:2894 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc705f7dff9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc706ce9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fc706136058 RCX: 00007fc705f7dff9 RDX: 0000000000001f00 RSI: 0000000020000500 RDI: 000000000000000e RBP: 00007fc705ff0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc706136058 R15: 00007ffd93dfd3b8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5587 Comm: syz.0.101 Not tainted 6.11.0-syzkaller-10557-gb24d7f0da6ef #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217 Code: c0 d7 03 00 65 8b 15 70 22 6f 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc RSP: 0018:ffffc90009a6f578 EFLAGS: 00000246 RAX: ffffffff8188c01b RBX: 1ffff110170c8ca1 RCX: ffff888075348000 RDX: 0000000000000002 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90009a6f780 R08: ffffffff8188bfea R09: 1ffffffff284d0f8 R10: dffffc0000000000 R11: fffffbfff284d0f9 R12: dffffc0000000000 R13: ffff8880b8646508 R14: ffff8880b873fc80 R15: 0000000000000000 FS: 00007f26cd98d6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcaeddfd6f4 CR3: 0000000024804000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: csd_lock_wait kernel/smp.c:340 [inline] smp_call_function_many_cond+0x1a0b/0x2ca0 kernel/smp.c:884 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2085 [inline] text_poke_bp_batch+0x726/0xb30 arch/x86/kernel/alternative.c:2357 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 tracepoint_add_func+0x953/0x9e0 kernel/tracepoint.c:361 tracepoint_probe_register_prio kernel/tracepoint.c:511 [inline] tracepoint_probe_register+0x105/0x160 kernel/tracepoint.c:531 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x478/0x930 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x243/0x2e0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x110 kernel/events/core.c:10358 perf_try_init_event+0x146/0x810 kernel/events/core.c:11892 perf_init_event kernel/events/core.c:11978 [inline] perf_event_alloc+0x135f/0x2310 kernel/events/core.c:12260 __do_sys_perf_event_open kernel/events/core.c:12767 [inline] __se_sys_perf_event_open+0xb1f/0x3870 kernel/events/core.c:12658 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f26ccb7dff9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f26cd98d038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f26ccd35f80 RCX: 00007f26ccb7dff9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f26ccbf0296 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f26ccd35f80 R15: 00007ffe58d8cb58