------------[ cut here ]------------ WARNING: CPU: 3 PID: 10594 at kernel/rcu/tree_stall.h:826 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:818 Modules linked in: CPU: 3 PID: 10594 Comm: syz-executor.2 Not tainted 5.13.0-rc6-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:826 Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 a0 e4 77 90 e8 8e 80 58 00 b8 01 00 00 00 87 05 13 ae 17 0f 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd c0 f7 f7 8b 48 c7 c3 4c 81 c9 8d 74 58 48 b8 00 00 RSP: 0018:ffffc900005c8e30 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000100004e11 RCX: ffffffff81603682 RDX: fffffbfff20efc94 RSI: 0000000000000004 RDI: ffffffff9077e4a0 RBP: ffffffff8bf7f7c0 R08: 0000000000000001 R09: 0000000000000003 R10: fffffbfff20efc94 R11: 1ffff110059a6cce R12: 1ffffffff1781e30 R13: 0000000000000246 R14: ffff88802cd36592 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802cd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000543978 CR3: 000000000bc8e000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_check_gp_start_stall kernel/rcu/tree_stall.h:789 [inline] rcu_core+0x4df/0x13b0 kernel/rcu/tree.c:2788 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:unwind_next_frame+0x34f/0x1ce0 arch/x86/kernel/unwind_orc.c:456 Code: e8 96 f5 ff ff 49 89 c0 4d 85 c0 0f 84 39 02 00 00 4d 8d 78 04 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 0f b6 04 02 <4c> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 1e 09 00 00 41 0f b6 40 RSP: 0018:ffffc900021ef078 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: 1ffff9200043de17 RCX: ffffffff81333be5 RDX: 1ffffffff1c8422c RSI: ffffffff8e421162 RDI: ffffffff8dd5a4d4 RBP: 0000000000000001 R08: ffffffff8e421162 R09: ffffffff8e421162 R10: fffff5200043de3f R11: 0000000000084087 R12: ffffc900021ef1e8 R13: ffffc900021ef1d5 R14: ffffc900021ef1a0 R15: ffffffff8e421166 __unwind_start+0x51b/0x800 arch/x86/kernel/unwind_orc.c:699 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5c/0xe0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 save_stack+0x151/0x1e0 mm/page_owner.c:119 __reset_page_owner+0x5d/0x170 mm/page_owner.c:140 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1298 [inline] free_pcp_prepare+0x223/0x300 mm/page_alloc.c:1342 free_unref_page_prepare mm/page_alloc.c:3250 [inline] free_unref_page_list+0x19b/0x7c0 mm/page_alloc.c:3318 release_pages+0x853/0x2120 mm/swap.c:972 __pagevec_lru_add+0xdaa/0x1bf0 mm/swap.c:1065 lru_add_drain_cpu+0x633/0x930 mm/swap.c:619 lru_add_drain+0x108/0x430 mm/swap.c:724 free_pages_and_swap_cache+0x18/0x90 mm/swap_state.c:322 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249 zap_pte_range mm/memory.c:1336 [inline] zap_pmd_range mm/memory.c:1385 [inline] zap_pud_range mm/memory.c:1414 [inline] zap_p4d_range mm/memory.c:1435 [inline] unmap_page_range+0x1b7e/0x2890 mm/memory.c:1456 unmap_single_vma+0x198/0x300 mm/memory.c:1501 unmap_vmas+0x16d/0x2f0 mm/memory.c:1533 exit_mmap+0x2a8/0x590 mm/mmap.c:3208 __mmput+0x122/0x470 kernel/fork.c:1096 mmput+0x58/0x60 kernel/fork.c:1117 exit_mm kernel/exit.c:502 [inline] do_exit+0xb0a/0x2a60 kernel/exit.c:813 do_group_exit+0x125/0x310 kernel/exit.c:923 get_signal+0x47f/0x2150 kernel/signal.c:2835 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x180/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: Unable to access opcode bytes at RIP 0x4665af. RSP: 002b:00007f450e44a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: 0000000000000000 RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffee713bd6f R14: 00007f450e44a300 R15: 0000000000022000