watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.129:6238] Modules linked in: irq event stamp: 15611577 hardirqs last enabled at (15611576): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (15611577): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (15250708): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (15250708): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (15250708): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (15250711): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (15250711): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (15250711): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6238 Comm: syz.4.129 Not tainted 6.15.0-syzkaller-ga633dab4b4d2 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:find_match+0xb14/0xc90 net/ipv6/route.c:804 Code: 0f 85 ea 00 00 00 41 88 1f 43 0f b6 04 2e 84 c0 0f 85 f5 00 00 00 44 89 65 00 b0 01 eb 07 e8 83 7d a2 f7 31 c0 48 83 c4 48 5b <41> 5c 41 5d 41 5e 41 5f 5d e9 be f5 4a 01 cc e8 68 7d a2 f7 e9 20 RSP: 0018:ffffc90000007150 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88802da9bc00 RDX: 0000000000000100 RSI: 00000000fffffffd RDI: 00000000fffffffd RBP: 1ffff1100ad9bb19 R08: ffffc90000007400 R09: ffffc90000007410 R10: ffffc90000007260 R11: fffff52000000e4e R12: dffffc0000000000 R13: 0000000000000003 R14: 1ffff1100ad9bb1b R15: 00000000fffffffd FS: 00007f919a4b76c0(0000) GS:ffff888125c54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000274000 CR3: 0000000034612000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __find_rr_leaf+0x23a/0x6d0 net/ipv6/route.c:869 find_rr_leaf net/ipv6/route.c:890 [inline] rt6_select net/ipv6/route.c:934 [inline] fib6_table_lookup+0x39f/0xa80 net/ipv6/route.c:2232 ip6_pol_route+0x222/0x1180 net/ipv6/route.c:2268 pol_lookup_func include/net/ip6_fib.h:617 [inline] fib6_rule_lookup+0x52f/0x6f0 net/ipv6/fib6_rules.c:120 ip6_route_input_lookup net/ipv6/route.c:2337 [inline] ip6_route_input+0x6ce/0xa50 net/ipv6/route.c:2640 ip6_rcv_finish+0x141/0x2d0 net/ipv6/ip6_input.c:77 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:317 __netif_receive_skb_one_core net/core/dev.c:5977 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6090 process_backlog+0x60e/0x14f0 net/core/dev.c:6442 __napi_poll+0xc4/0x480 net/core/dev.c:7414 napi_poll net/core/dev.c:7478 [inline] net_rx_action+0x707/0xe30 net/core/dev.c:7605 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7108 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 4b ab 29 f6 e8 26 c3 60 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9001a7c7840 EFLAGS: 00000286 RAX: 27afa83fbb35cc00 RBX: 0000000000000000 RCX: 27afa83fbb35cc00 RDX: 0000000000000007 RSI: ffffffff8d97cf77 RDI: 0000000000000001 RBP: ffffc9001a7c78e0 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920034f8f08 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:sched_mm_cid_exit_signals+0x31f/0x4b0 kernel/sched/core.c:10685 Code: 43 35 00 48 c7 44 24 60 00 00 00 00 9c 8f 44 24 60 f6 44 24 61 02 75 57 f7 c3 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00 RSP: 0018:ffffc9001a7c79a0 EFLAGS: 00000206 RAX: 27afa83fbb35cc00 RBX: 0000000000000287 RCX: 27afa83fbb35cc00 RDX: 0000000000000007 RSI: ffffffff8d97cf77 RDI: ffffffff8be28800 RBP: ffffc9001a7c7a88 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: 1ffff920034f8f3c R13: dffffc0000000000 R14: ffff88802da9d18c R15: dffffc0000000000 exit_signals+0x31a/0x580 kernel/signal.c:3128 do_exit+0x352/0x22e0 kernel/exit.c:912 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f919958e929 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:00007f919a4b7038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000005 RBX: 00007f91997b5fa0 RCX: 00007f919958e929 RDX: affffff7ffffffff RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f9199610b39 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f91997b5fa0 R15: 00007ffcaacc3f08 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6224 Comm: syz.3.125 Not tainted 6.15.0-syzkaller-ga633dab4b4d2 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x9b/0x2c0 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb <41> 80 3b 00 0f 85 de 01 00 00 49 ff c3 48 ff c3 75 ee e9 21 01 00 RSP: 0018:ffffc90000a087b0 EFLAGS: 00000086 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff81c7ee28 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fa101f0 RBP: 0000000000000000 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203e R12: 0000000000000001 R13: 0000000000000000 R14: fffffbfff1f4203f R15: 1ffffffff1f4203e FS: 0000000000000000(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005609f85f7fb0 CR3: 0000000073570000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] cpumask_test_cpu include/linux/cpumask.h:638 [inline] cpu_online include/linux/cpumask.h:1197 [inline] trace_irq_disable+0x28/0x110 include/trace/events/preemptirq.h:36 irqentry_enter+0x3d/0x60 kernel/entry/common.c:250 sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__alloc_skb+0x5/0x2d0 net/core/skbuff.c:643 Code: 8c fe ff ff 49 ff cc e8 69 c4 7a f8 4d 89 e7 e9 7c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 10 89 cd 41 89 d6 41 89 f5 89 RSP: 0018:ffffc90000a088d8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88803310fad0 RCX: 00000000ffffffff RDX: 0000000000000000 RSI: 0000000000000820 RDI: 0000000000000180 RBP: ffff88803310fa80 R08: ffff888025758000 R09: 0000000000000002 R10: 0000000000000003 R11: 0000000000000100 R12: ffff888021a98b40 R13: dffffc0000000000 R14: 0000000000000180 R15: ffff888021a98bbe skb_copy+0x188/0x800 net/core/skbuff.c:2125 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0 drivers/net/wireless/virtual/mac80211_hwsim.c:1871 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2222 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323 __iterate_interfaces+0x2a8/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2353 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:folio_mark_accessed+0x3f3/0x8b0 mm/swap.c:482 Code: c1 74 62 e8 bf 8b c4 ff eb 8f e8 b8 8b c4 ff 49 bd 00 00 00 00 00 fc ff df 48 c7 44 24 20 0e 36 e0 45 4b c7 04 2f 00 00 00 00 <66> 43 c7 44 2f 09 00 00 43 c6 44 2f 0b 00 65 48 8b 05 57 ea a0 10 RSP: 0018:ffffc9000c6af2c0 EFLAGS: 00000293 RAX: ffffffff81fbd5ec RBX: ffffea0001d20e00 RCX: ffff888025758000 RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffffc9000c6af390 R08: ffffea0001d20e07 R09: 1ffffd40003a41c0 R10: dffffc0000000000 R11: fffff940003a41c1 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000200 R15: 1ffff920018d5e5c zap_present_folio_ptes mm/memory.c:1514 [inline] zap_present_ptes mm/memory.c:1590 [inline] do_zap_pte_range mm/memory.c:1691 [inline] zap_pte_range mm/memory.c:1735 [inline] zap_pmd_range mm/memory.c:1827 [inline] zap_pud_range mm/memory.c:1856 [inline] zap_p4d_range mm/memory.c:1877 [inline] unmap_page_range+0x1c69/0x41c0 mm/memory.c:1898 unmap_single_vma mm/memory.c:1941 [inline] unmap_vmas+0x399/0x580 mm/memory.c:1985 exit_mmap+0x248/0xb50 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1121 exit_mm+0x1da/0x2c0 kernel/exit.c:581 do_exit+0x640/0x22e0 kernel/exit.c:943 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc53ab8d290 Code: Unable to access opcode bytes at 0x7fc53ab8d266. RSP: 002b:00007fc53b9caf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: 0000000000000005 RBX: 0000000000000002 RCX: 00007fc53ab8d290 RDX: 0000000000000002 RSI: 00007fc53b9cafa0 RDI: 00000000ffffff9c RBP: 00007fc53b9cafa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc53adb5fa0 R15: 00007fff7db0d828