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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2d5404caa8c7 Linux 6.12-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1393335f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=a0d77fb8077b4744 dashboard link: https://syzkaller.appspot.com/bug?extid=4727d10d6a805738b0f2 compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1793335f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144ff4e8580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-2d5404ca.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9fafeb95420d/vmlinux-2d5404ca.xz kernel image: https://storage.googleapis.com/syzbot-assets/498f7a357ea2/Image-2d5404ca.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4727d10d6a805738b0f2@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3270 at arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x1b4/0x1f4 arch/arm64/kvm/mmio.c:99 Modules linked in: CPU: 0 UID: 0 PID: 3270 Comm: syz-executor447 Not tainted 6.12.0-rc7-syzkaller #0 Hardware name: linux,dummy-virt (DT) pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : kvm_incr_pc arch/arm64/include/asm/kvm_emulate.h:536 [inline] pc : kvm_handle_mmio_return+0x1b4/0x1f4 arch/arm64/kvm/mmio.c:118 lr : kvm_arch_vcpu_ioctl_run+0x1ac/0x854 arch/arm64/kvm/arm.c:1135 sp : ffff800088e33ab0 x29: ffff800088e33ab0 x28: f6f0000005b35b40 x27: 0000000000000000 x26: 0000000000000000 x25: fbf00000073d8048 x24: fbf00000073d8000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: f3f000000664a000 x19: fbf00000073d8000 x18: ffffffffffffffff x17: 0000000000000000 x16: 0000000000000000 x15: ffff800088e33aa0 x14: ffff800088e33d88 x13: ffff800088e33d4a x12: 6d766b3a65646f6e x11: 0000000000000000 x10: 0000000000000078 x9 : 000000000000000c x8 : ffff800088e33d98 x7 : 0000000000000000 x6 : 0000000000005452 x5 : 0000000000000005 x4 : f0f00000060bd300 x3 : f6f0000005b35b40 x2 : 0000000000000000 x1 : 0000000093c18046 x0 : 0000000000000001 Call trace: kvm_handle_mmio_return+0x1b4/0x1f4 arch/arm64/kvm/mmio.c:99 kvm_arch_vcpu_ioctl_run+0x1ac/0x854 arch/arm64/kvm/arm.c:1135 kvm_vcpu_ioctl+0x294/0xa04 virt/kvm/kvm_main.c:4475 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0xac/0xf0 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151 el0_svc+0x30/0xdc arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 ---[ end trace 0000000000000000 ]--- --- 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@googlegroups.com. 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