On Mon, Aug 25, 2025 at 02:08:41PM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 7b8346bd9fce KVM: arm64: Don't attempt vLPI mappings when .. > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next > console output: https://syzkaller.appspot.com/x/log.txt?x=17b4e862580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=7c53d3478750eda0 > dashboard link: https://syzkaller.appspot.com/bug?extid=cef594105ac7e60c6d93 > compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 > userspace arch: arm64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15860634580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1074e862580000 > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/fa3fbcfdac58/non_bootable_disk-7b8346bd.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/74f545807499/vmlinux-7b8346bd.xz > kernel image: https://storage.googleapis.com/syzbot-assets/d83062566dc7/Image-7b8346bd.gz.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+cef594105ac7e60c6d93@xxxxxxxxxxxxxxxxxxxxxxxxx > > ============================= > [ BUG: Invalid wait context ] > 6.16.0-rc3-syzkaller-g7b8346bd9fce #0 Not tainted > ----------------------------- > syz.0.29/3743 is trying to lock: > a3ff80008e2e9e18 (&xa->xa_lock#20){....}-{3:3}, at: vgic_put_irq+0xb4/0x190 arch/arm64/kvm/vgic/vgic.c:137 > other info that might help us debug this: > context-{5:5} > 3 locks held by syz.0.29/3743: > #0: a3ff80008e2e90a8 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vgic_destroy+0x50/0x624 arch/arm64/kvm/vgic/vgic-init.c:499 > #1: a3ff80008e2e9fa0 (&kvm->arch.config_lock){+.+.}-{4:4}, at: kvm_vgic_destroy+0x5c/0x624 arch/arm64/kvm/vgic/vgic-init.c:500 > #2: 58f0000021be1428 (&vgic_cpu->ap_list_lock){....}-{2:2}, at: vgic_flush_pending_lpis+0x3c/0x31c arch/arm64/kvm/vgic/vgic.c:150 > stack backtrace: > CPU: 0 UID: 0 PID: 3743 Comm: syz.0.29 Not tainted 6.16.0-rc3-syzkaller-g7b8346bd9fce #0 PREEMPT > Hardware name: linux,dummy-virt (DT) > Call trace: > show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) > __dump_stack+0x30/0x40 lib/dump_stack.c:94 > dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 > dump_stack+0x1c/0x28 lib/dump_stack.c:129 > print_lock_invalid_wait_context kernel/locking/lockdep.c:4833 [inline] > check_wait_context kernel/locking/lockdep.c:4905 [inline] > __lock_acquire+0x978/0x299c kernel/locking/lockdep.c:5190 > lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 > vgic_put_irq+0xb4/0x190 arch/arm64/kvm/vgic/vgic.c:137 > vgic_flush_pending_lpis+0x24c/0x31c arch/arm64/kvm/vgic/vgic.c:158 > __kvm_vgic_vcpu_destroy+0x44/0x500 arch/arm64/kvm/vgic/vgic-init.c:455 > kvm_vgic_destroy+0x100/0x624 arch/arm64/kvm/vgic/vgic-init.c:505 > kvm_arch_destroy_vm+0x80/0x138 arch/arm64/kvm/arm.c:244 > kvm_destroy_vm virt/kvm/kvm_main.c:1308 [inline] > kvm_put_kvm+0x800/0xff8 virt/kvm/kvm_main.c:1344 > kvm_vm_release+0x58/0x78 virt/kvm/kvm_main.c:1367 > __fput+0x4ac/0x980 fs/file_table.c:465 > ____fput+0x20/0x58 fs/file_table.c:493 > task_work_run+0x1bc/0x254 kernel/task_work.c:227 > resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] > do_notify_resume+0x1b4/0x270 arch/arm64/kernel/entry-common.c:151 > exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] > exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] > el0_svc+0xb4/0x160 arch/arm64/kernel/entry-common.c:768 > el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 > el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 > > > --- > 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. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup #syz test git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git fixes
