Hello, syzbot found the following issue on: HEAD commit: f4bc5bbb5fef Merge tag 'nfsd-5.17-2' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16c683d8700000 kernel config: https://syzkaller.appspot.com/x/.config?x=5707221760c00a20 dashboard link: https://syzkaller.appspot.com/bug?extid=644848628d5e12d5438c compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1691d2c2700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16cde752700000 Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=174c8174700000 final oops: https://syzkaller.appspot.com/x/report.txt?x=14cc8174700000 console output: https://syzkaller.appspot.com/x/log.txt?x=10cc8174700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+644848628d5e12d5438c@xxxxxxxxxxxxxxxxxxxxxxxxx do_one_initcall+0x103/0x650 init/main.c:1300 do_initcall_level init/main.c:1373 [inline] do_initcalls init/main.c:1389 [inline] do_basic_setup init/main.c:1408 [inline] kernel_init_freeable+0x6b1/0x73a init/main.c:1613 kernel_init+0x1a/0x1d0 init/main.c:1502 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ------------[ cut here ]------------ kernel BUG at include/linux/memcontrol.h:470! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3678 Comm: syz-executor106 Not tainted 5.17.0-rc3-syzkaller-00043-gf4bc5bbb5fef #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:folio_memcg_rcu include/linux/memcontrol.h:470 [inline] RIP: 0010:workingset_activation+0x4f2/0x5d0 mm/workingset.c:412 Code: 48 89 ef e8 50 01 00 00 c6 05 da cf d3 0b 01 0f 0b e9 0e fd ff ff e8 6d 90 cc ff 48 c7 c6 c0 0c b7 89 48 89 ef e8 2e 01 00 00 <0f> 0b e8 57 90 cc ff 0f 0b e9 e6 fb ff ff e8 4b 90 cc ff 48 c7 c6 RSP: 0018:ffffc90002ac7490 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff8880729940c0 RSI: ffffffff81ab1de2 RDI: 0000000000000003 RBP: ffffea0001aa0000 R08: 0000000000000018 R09: 00000000ffffffff R10: ffffffff8908d53c R11: 00000000ffffffff R12: 0000000000000000 R13: ffff8880b9c34da8 R14: dffffc0000000000 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa33152f1f0 CR3: 000000001b7f5000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> folio_mark_accessed+0x596/0xdd0 mm/swap.c:442 kvm_set_pfn_accessed arch/x86/kvm/../../../virt/kvm/kvm_main.c:2821 [inline] kvm_set_pfn_accessed+0x1d8/0x220 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2818 handle_changed_spte_acc_track arch/x86/kvm/mmu/tdp_mmu.c:233 [inline] handle_changed_spte_acc_track+0x1bc/0x290 arch/x86/kvm/mmu/tdp_mmu.c:225 handle_changed_spte arch/x86/kvm/mmu/tdp_mmu.c:485 [inline] handle_removed_tdp_mmu_page arch/x86/kvm/mmu/tdp_mmu.c:370 [inline] __handle_changed_spte+0xb93/0x13e0 arch/x86/kvm/mmu/tdp_mmu.c:475 handle_changed_spte arch/x86/kvm/mmu/tdp_mmu.c:483 [inline] handle_removed_tdp_mmu_page arch/x86/kvm/mmu/tdp_mmu.c:370 [inline] __handle_changed_spte+0xb84/0x13e0 arch/x86/kvm/mmu/tdp_mmu.c:475 handle_changed_spte arch/x86/kvm/mmu/tdp_mmu.c:483 [inline] handle_removed_tdp_mmu_page arch/x86/kvm/mmu/tdp_mmu.c:370 [inline] __handle_changed_spte+0xb84/0x13e0 arch/x86/kvm/mmu/tdp_mmu.c:475 __tdp_mmu_set_spte+0x227/0xa70 arch/x86/kvm/mmu/tdp_mmu.c:595 tdp_mmu_set_spte arch/x86/kvm/mmu/tdp_mmu.c:609 [inline] zap_gfn_range+0xd4c/0xe00 arch/x86/kvm/mmu/tdp_mmu.c:751 __kvm_tdp_mmu_zap_gfn_range+0xdc/0x110 arch/x86/kvm/mmu/tdp_mmu.c:779 kvm_tdp_mmu_zap_gfn_range arch/x86/kvm/mmu/tdp_mmu.h:27 [inline] kvm_tdp_mmu_zap_all+0x26/0x70 arch/x86/kvm/mmu/tdp_mmu.c:791 kvm_mmu_zap_all+0x27c/0x2c0 arch/x86/kvm/mmu/mmu.c:5983 kvm_mmu_notifier_release+0x5f/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:819 mn_hlist_release mm/mmu_notifier.c:319 [inline] __mmu_notifier_release+0x1a9/0x600 mm/mmu_notifier.c:357 mmu_notifier_release include/linux/mmu_notifier.h:415 [inline] exit_mmap+0x543/0x670 mm/mmap.c:3136 __mmput+0x122/0x4b0 kernel/fork.c:1114 mmput+0x56/0x60 kernel/fork.c:1135 exit_mm kernel/exit.c:507 [inline] do_exit+0xa3c/0x2a30 kernel/exit.c:793 do_group_exit+0xd2/0x2f0 kernel/exit.c:935 __do_sys_exit_group kernel/exit.c:946 [inline] __se_sys_exit_group kernel/exit.c:944 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:944 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fa3314b91f9 Code: Unable to access opcode bytes at RIP 0x7fa3314b91cf. RSP: 002b:00007fffac3303d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fa33152e350 RCX: 00007fa3314b91f9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 00007fa33152e350 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_memcg_rcu include/linux/memcontrol.h:470 [inline] RIP: 0010:workingset_activation+0x4f2/0x5d0 mm/workingset.c:412 Code: 48 89 ef e8 50 01 00 00 c6 05 da cf d3 0b 01 0f 0b e9 0e fd ff ff e8 6d 90 cc ff 48 c7 c6 c0 0c b7 89 48 89 ef e8 2e 01 00 00 <0f> 0b e8 57 90 cc ff 0f 0b e9 e6 fb ff ff e8 4b 90 cc ff 48 c7 c6 RSP: 0018:ffffc90002ac7490 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff8880729940c0 RSI: ffffffff81ab1de2 RDI: 0000000000000003 RBP: ffffea0001aa0000 R08: 0000000000000018 R09: 00000000ffffffff R10: ffffffff8908d53c R11: 00000000ffffffff R12: 0000000000000000 R13: ffff8880b9c34da8 R14: dffffc0000000000 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa33152f1f0 CR3: 000000001b7f5000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
