rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 6126 jiffies s: 8101 root: 0x2/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5922 Comm: syz.3.872 Not tainted 6.1.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:match_held_lock+0x2/0xb0 kernel/locking/lockdep.c:5107 Code: f3 03 00 75 cf 48 c7 c7 e0 01 0c 8b 48 c7 c6 20 02 0c 8b e8 a0 c1 ab f6 0f 0b eb b6 e8 e7 fa ff ff 0f 1f 80 00 00 00 00 55 53 01 00 00 00 48 39 77 10 74 67 48 89 fb 81 7f 20 00 00 10 00 72 RSP: 0018:ffffc900001e0380 EFLAGS: 00000097 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff88802ca60000 RDX: ffff88802ca60000 RSI: ffff8880b8f2a4d8 RDI: ffff88802ca60ae0 RBP: ffff88802ca60ae0 R08: ffffffff8179dcc1 R09: fffffbfff1d33cae R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000046 R13: ffff88802ca60000 R14: 00000000ffffffff R15: ffff8880b8f2a4d8 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055cecd0f6a10 CR3: 000000002419a000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_is_held kernel/locking/lockdep.c:5403 [inline] lock_is_held_type+0xa4/0x180 kernel/locking/lockdep.c:5705 lock_is_held include/linux/lockdep.h:283 [inline] __run_hrtimer kernel/time/hrtimer.c:1655 [inline] __hrtimer_run_queues+0x307/0xe50 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:__stack_depot_save+0x15c/0x470 lib/stackdepot.c:452 Code: 0e 29 c5 41 31 ed c1 c5 18 41 29 ed eb 03 44 89 e7 48 8b 05 ce 7f 05 13 8b 1d c4 7f 05 13 44 21 eb 48 89 44 24 10 4c 8b 34 d8 <4c> 89 c5 41 89 ec eb 03 4d 8b 36 4d 85 f6 74 2a 45 39 6e 08 75 f2 RSP: 0018:ffffc900001e0738 EFLAGS: 00000202 RAX: ffff88823b400000 RBX: 00000000000b7a2c RCX: 00000000aeacbcca RDX: ffffc900001e0818 RSI: 0000000000000002 RDI: 0000000000000800 RBP: 0000000098486928 R08: 0000000000000010 R09: 0000000000000001 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000800 R13: 000000004a3b7a2c R14: ffff888035bc2500 R15: ffffc900001e07a0 kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x60/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x292/0x510 mm/slub.c:3683 tcp_write_queue_purge+0x132/0x2f0 net/ipv4/tcp.c:3099 tcp_done_with_error+0x3d/0xc0 net/ipv4/tcp_input.c:4366 tcp_write_err net/ipv4/tcp_timer.c:70 [inline] tcp_probe_timer net/ipv4/tcp_timer.c:396 [inline] tcp_write_timer_handler+0x640/0x8e0 net/ipv4/tcp_timer.c:663 tcp_write_timer+0x12e/0x280 net/ipv4/tcp_timer.c:676 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1549 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1820 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571 __do_softirq kernel/softirq.c:605 [inline] invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:preempt_schedule_irq+0xf2/0x1c0 kernel/sched/core.c:6870 Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 97 00 00 00 bf 01 00 00 00 e8 e9 f2 ae f6 e8 14 ef e1 f6 fb bf 01 00 00 00 79 b4 ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 d9 ae 32 f7 48 RSP: 0018:ffffc90016717160 EFLAGS: 00000286 RAX: b09af7e662615400 RBX: 1ffff92002ce2e34 RCX: ffffffff816af0fa RDX: dffffc0000000000 RSI: ffffffff8b0c0340 RDI: 0000000000000001 RBP: ffffc90016717210 R08: dffffc0000000000 R09: fffffbfff223b84b R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92002ce2e2c R13: 1ffff92002ce2e30 R14: ffffc90016717180 R15: dffffc0000000000 irqentry_exit+0x53/0x80 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x7b/0x290 mm/kasan/generic.c:189 Code: 00 00 00 00 fc ff df 4f 8d 34 1a 4c 89 f5 4c 29 cd 48 83 fd 10 7f 26 48 85 ed 0f 84 3a 01 00 00 49 f7 d2 49 01 da 41 80 39 00 <0f> 85 c4 01 00 00 49 ff c1 49 ff c2 75 ee e9 1d 01 00 00 45 89 cf RSP: 0018:ffffc900167172d8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff92002ce2e94 RCX: ffffffff81cc59e7 RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900167174a0 RBP: 0000000000000002 R08: dffffc0000000000 R09: fffff52002ce2e94 R10: fffffffffffffffe R11: dffffc0000000001 R12: ffff888027a8dff0 R13: 00007f3c501fe000 R14: fffff52002ce2e96 R15: dffffc0000000000 memset+0x1f/0x40 mm/kasan/shadow.c:44 init_rss_vec mm/memory.c:498 [inline] zap_pte_range mm/memory.c:1416 [inline] zap_pmd_range mm/memory.c:1574 [inline] zap_pud_range mm/memory.c:1603 [inline] zap_p4d_range mm/memory.c:1624 [inline] unmap_page_range+0x9f7/0x2740 mm/memory.c:1645 unmap_vmas+0x48b/0x640 mm/memory.c:1730 exit_mmap+0x252/0x9f0 mm/mmap.c:3227 __mmput+0x115/0x3c0 kernel/fork.c:1199 exit_mm+0x226/0x300 kernel/exit.c:565 do_exit+0x9f6/0x26a0 kernel/exit.c:858 do_group_exit+0x202/0x2b0 kernel/exit.c:1021 get_signal+0x16f7/0x17d0 kernel/signal.c:2870 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f3c5117df39 Code: Unable to access opcode bytes at 0x7f3c5117df0f. RSP: 002b:00007f3c51f41038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 000000000000000a RBX: 00007f3c51336058 RCX: 00007f3c5117df39 RDX: 0000000000000010 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007f3c511f0216 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3c51336058 R15: 00007fffb8322468