watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.4.9:5946] Modules linked in: irq event stamp: 13660157 hardirqs last enabled at (13660156): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (13660157): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (11000396): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11000396): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11000396): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11000399): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11000399): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11000399): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 5946 Comm: syz.4.9 Not tainted 6.15.0-syzkaller-g64a064ce33b1 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:kasan_byte_accessible+0x16/0x30 mm/kasan/generic.c:201 Code: 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df 0f b6 04 07 <3c> 08 0f 92 c0 e9 00 c1 44 09 cc 66 66 66 66 66 66 2e 0f 1f 84 00 RSP: 0000:ffffc90000a089f0 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffffff8b6833ee RCX: cbed88bd4ea5c000 RDX: 0000000000000000 RSI: ffffffff8b6833ee RDI: 1ffff1100b0356b0 RBP: ffffffff8a1a80e2 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100effd7e4 R12: 0000000000000000 R13: ffff8880581ab580 R14: ffff8880581ab580 R15: 0000000000000001 FS: 00007ffbcf82c6c0(0000) GS:ffff888125d55000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3080bff8 CR3: 0000000075f82000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __kasan_check_byte+0x12/0x40 mm/kasan/common.c:556 kasan_check_byte include/linux/kasan.h:399 [inline] lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5845 __raw_write_lock include/linux/rwlock_api_smp.h:209 [inline] _raw_write_lock+0x2e/0x40 kernel/locking/spinlock.c:300 addrconf_rs_timer+0x372/0x670 net/ipv6/addrconf.c:4046 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 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 0b 2a f6 e8 a6 1d 61 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: 0000:ffffc90004c57dc0 EFLAGS: 00000282 RAX: cbed88bd4ea5c000 RBX: 0000000000000000 RCX: cbed88bd4ea5c000 RDX: 0000000000000000 RSI: ffffffff8d97cb93 RDI: 0000000000000001 RBP: ffffc90004c57e70 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200098afb8 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:exit_to_user_mode_loop kernel/entry/common.c:124 [inline] RIP: 0010:exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] RIP: 0010:irqentry_exit_to_user_mode+0x90/0x120 kernel/entry/common.c:184 Code: 0b 48 89 df e8 11 a3 8f f6 4c 89 f8 a9 04 00 02 00 74 0b 48 89 df e8 cf f8 fe f5 4c 89 f8 a8 02 74 08 48 89 df e8 30 58 45 f6 bb 58 45 f6 e8 f6 58 45 f6 eb a2 e8 3f 5c 45 f6 e8 9a 5c 45 f6 RSP: 0000:ffffc90004c57f38 EFLAGS: 00000246 RAX: cbed88bd4ea5c000 RBX: ffffc90004c57f58 RCX: 1ffff9200098afcc RDX: ffffc9000dfb2000 RSI: 00000000000073a2 RDI: 00000000000073a3 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8192a2ff R10: dffffc0000000000 R11: fffff5200098afbd R12: 0000000000000000 R13: 0000000000000000 R14: ffff888031d79e00 R15: 000000000000000a asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7ffbce98e929 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:00007ffbcf82c038 EFLAGS: 00000246 RAX: 000000000000000b RBX: 00007ffbcebb6080 RCX: 00007ffbce98e929 RDX: affffff7ffffffff RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007ffbcea10b39 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffbcebb6080 R15: 00007ffd4329df18 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5921 Comm: syz.3.4 Not tainted 6.15.0-syzkaller-g64a064ce33b1 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:-1 [inline] RIP: 0010:validate_chain+0x8a/0x2140 kernel/locking/lockdep.c:3879 Code: 59 1f 03 85 c0 74 22 83 3d 86 b7 02 0e 00 75 19 90 48 c7 c7 93 84 b6 8d 48 c7 c6 6c 02 a6 8d e8 3c 8e e5 ff 90 0f 0b 90 90 90 <48> bb eb 83 b5 80 46 86 c8 61 49 0f af df 48 c1 eb 2d 48 8b 04 dd RSP: 0018:ffffc90000006a98 EFLAGS: 00000003 RAX: 0000000000000054 RBX: 0000000000000006 RCX: 0000000000040000 RDX: 0000000000000001 RSI: ffff8880248fc7e0 RDI: ffff8880248fbc00 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff81aec01e R10: 0000000000000003 R11: 0000000000010100 R12: 0000000000000001 R13: ffff8880248fc6f0 R14: ffff8880248fc7e0 R15: 18ff7db76fd66277 FS: 0000000000000000(0000) GS:ffff888125c55000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd4ea32f040 CR3: 0000000075bba000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 seqcount_lockdep_reader_access+0xc9/0x1c0 include/linux/seqlock.h:72 ktime_get+0x3e/0x1f0 kernel/time/timekeeping.c:776 clockevents_program_event+0xea/0x360 kernel/time/clockevents.c:326 hrtimer_interrupt+0x620/0xaa0 kernel/time/hrtimer.c:1900 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:memcmp+0x173/0x230 lib/string.c:693 Code: 33 ff ff ff 48 89 34 24 be 08 00 00 00 48 89 fd 48 89 c7 49 89 d5 e8 fc 2c c2 f6 48 89 ef 48 8b 34 24 4c 89 ea e9 0d ff ff ff <48> 85 d2 0f 84 95 00 00 00 31 db 48 8d 04 1f 48 89 c1 48 c1 e9 03 RSP: 0018:ffffc90000007020 EFLAGS: 00000293 RAX: ffffffff8aba961a RBX: 0000000000000002 RCX: ffff8880248fbc00 RDX: 0000000000000006 RSI: ffff8880328b38bc RDI: ffffc9000000733c RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000000e30 R12: ffffc9000000733c R13: dffffc0000000000 R14: ffff8880776bbf00 R15: dffffc0000000000 _Z6memcmpPKvU25pass_dynamic_object_size0S0_U25pass_dynamic_object_size0m include/linux/fortify-string.h:727 [inline] cmp_bss+0x4f8/0xe80 net/wireless/scan.c:1488 rb_find_bss net/wireless/scan.c:1682 [inline] __cfg80211_bss_update+0xdb/0x2120 net/wireless/scan.c:1969 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2363 cfg80211_inform_bss_data+0x1fb/0x3b20 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x362/0x700 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x527/0x9b0 net/mac80211/scan.c:356 __ieee80211_rx_handle_packet net/mac80211/rx.c:5179 [inline] ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5416 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5439 ieee80211_rx include/net/mac80211.h:5185 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441 tasklet_action_common+0x36c/0x580 kernel/softirq.c:829 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:__mod_node_page_state+0x3d/0x170 mm/vmstat.c:379 Code: f7 49 89 fc 48 bd 00 00 00 00 00 fc ff df 4c 8d b7 40 5a 00 00 4c 89 f0 48 c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 33 ad 20 00 <4d> 8b 2e 45 89 fe 41 83 ff 33 0f 83 de 00 00 00 41 8d 47 fb 83 f8 RSP: 0018:ffffc90004abf208 EFLAGS: 00000246 RAX: 1ffff110280001c8 RBX: ffffffffffffffff RCX: 0000000000000000 RDX: ffffffffffffffff RSI: 0000000000000012 RDI: ffff88813fffb400 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff822b49f9 R10: dffffc0000000000 R11: fffff9400034b067 R12: ffff88813fffb400 R13: 1ffff110038531dc R14: ffff888140000e40 R15: 0000000000000012 __mod_lruvec_state mm/memcontrol.c:776 [inline] __lruvec_stat_mod_folio+0x191/0x2f0 mm/memcontrol.c:800 __folio_mod_stat mm/rmap.c:1412 [inline] __folio_remove_rmap mm/rmap.c:1777 [inline] folio_remove_rmap_ptes+0x14b/0xaf0 mm/rmap.c:1804 tlb_flush_rmap_batch+0x133/0x2d0 mm/mmu_gather.c:66 tlb_flush_rmaps+0x69/0xf0 mm/mmu_gather.c:87 zap_pte_range mm/memory.c:1763 [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+0x3832/0x41c0 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: 0033:0x7f8faa78e929 Code: Unable to access opcode bytes at 0x7f8faa78e8ff. RSP: 002b:00007f8fab69a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 000000000000000b RBX: 00007f8faa9b5fa0 RCX: 00007f8faa78e929 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 000000000000002c RBP: 00007f8faa810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8faa9b5fa0 R15: 00007ffe41a775b8