On Tue, 15 Nov 2022 08:23:44 -0800 syzbot <syzbot+644848628d5e12d5438c@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzbot found the following issue on: Thanks. > 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! That's VM_BUG_ON_FOLIO(folio_test_slab(folio), folio); in folio_memcg_rcu(). I'll cc the KVM list. > 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
