Hello, syzbot found the following issue on: HEAD commit: e058a84b Merge tag 'drm-next-2021-07-01' of git://anongit... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=171fbbdc300000 kernel config: https://syzkaller.appspot.com/x/.config?x=8c46abb9076f44dc dashboard link: https://syzkaller.appspot.com/bug?extid=c87d2efb740931ec76c7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119d1efc300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c58c28300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c87d2efb740931ec76c7@xxxxxxxxxxxxxxxxxxxxxxxxx executing program BUG: memory leak unreferenced object 0xffff888101be6180 (size 32): comm "syz-executor591", pid 8432, jiffies 4294944117 (age 12.420s) hex dump (first 32 bytes): 00 10 dc 00 00 c9 ff ff 20 ee 80 84 ff ff ff ff ........ ....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81043830>] kmalloc include/linux/slab.h:591 [inline] [<ffffffff81043830>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff81043830>] kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:916 [inline] [<ffffffff81043830>] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4471 [inline] [<ffffffff81043830>] kvm_dev_ioctl+0x710/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4498 [<ffffffff81588bec>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81588bec>] __do_sys_ioctl fs/ioctl.c:1069 [inline] [<ffffffff81588bec>] __se_sys_ioctl fs/ioctl.c:1055 [inline] [<ffffffff81588bec>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:1055 [<ffffffff84396e45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84396e45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888101c620a0 (size 32): comm "syz-executor591", pid 8432, jiffies 4294944117 (age 12.420s) hex dump (first 32 bytes): 00 10 dc 00 00 c9 ff ff e0 ee 80 84 ff ff ff ff ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81043830>] kmalloc include/linux/slab.h:591 [inline] [<ffffffff81043830>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff81043830>] kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:916 [inline] [<ffffffff81043830>] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4471 [inline] [<ffffffff81043830>] kvm_dev_ioctl+0x710/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4498 [<ffffffff81588bec>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81588bec>] __do_sys_ioctl fs/ioctl.c:1069 [inline] [<ffffffff81588bec>] __se_sys_ioctl fs/ioctl.c:1055 [inline] [<ffffffff81588bec>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:1055 [<ffffffff84396e45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84396e45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888101c62360 (size 32): comm "syz-executor591", pid 8432, jiffies 4294944118 (age 12.410s) hex dump (first 32 bytes): 00 10 dc 00 00 c9 ff ff 20 ef 80 84 ff ff ff ff ........ ....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81043830>] kmalloc include/linux/slab.h:591 [inline] [<ffffffff81043830>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff81043830>] kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:916 [inline] [<ffffffff81043830>] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4471 [inline] [<ffffffff81043830>] kvm_dev_ioctl+0x710/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4498 [<ffffffff81588bec>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81588bec>] __do_sys_ioctl fs/ioctl.c:1069 [inline] [<ffffffff81588bec>] __se_sys_ioctl fs/ioctl.c:1055 [inline] [<ffffffff81588bec>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:1055 [<ffffffff84396e45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84396e45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888101c62ba0 (size 32): comm "syz-executor591", pid 8432, jiffies 4294944118 (age 12.410s) hex dump (first 32 bytes): 00 10 dc 00 00 c9 ff ff 60 ef 80 84 ff ff ff ff ........`....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81043830>] kmalloc include/linux/slab.h:591 [inline] [<ffffffff81043830>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff81043830>] kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:916 [inline] [<ffffffff81043830>] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4471 [inline] [<ffffffff81043830>] kvm_dev_ioctl+0x710/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4498 [<ffffffff81588bec>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81588bec>] __do_sys_ioctl fs/ioctl.c:1069 [inline] [<ffffffff81588bec>] __se_sys_ioctl fs/ioctl.c:1055 [inline] [<ffffffff81588bec>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:1055 [<ffffffff84396e45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84396e45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888101c62b20 (size 32): comm "syz-executor591", pid 8432, jiffies 4294944118 (age 12.410s) hex dump (first 32 bytes): 00 10 dc 00 00 c9 ff ff a0 ef 80 84 ff ff ff ff ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81043830>] kmalloc include/linux/slab.h:591 [inline] [<ffffffff81043830>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff81043830>] kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:916 [inline] [<ffffffff81043830>] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4471 [inline] [<ffffffff81043830>] kvm_dev_ioctl+0x710/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4498 [<ffffffff81588bec>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81588bec>] __do_sys_ioctl fs/ioctl.c:1069 [inline] [<ffffffff81588bec>] __se_sys_ioctl fs/ioctl.c:1055 [inline] [<ffffffff81588bec>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:1055 [<ffffffff84396e45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84396e45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888101c62660 (size 32): comm "syz-executor591", pid 8432, jiffies 4294944118 (age 12.410s) hex dump (first 32 bytes): 00 10 dc 00 00 c9 ff ff e0 ef 80 84 ff ff ff ff ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81043830>] kmalloc include/linux/slab.h:591 [inline] [<ffffffff81043830>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff81043830>] kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:916 [inline] [<ffffffff81043830>] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4471 [inline] [<ffffffff81043830>] kvm_dev_ioctl+0x710/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4498 [<ffffffff81588bec>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81588bec>] __do_sys_ioctl fs/ioctl.c:1069 [inline] [<ffffffff81588bec>] __se_sys_ioctl fs/ioctl.c:1055 [inline] [<ffffffff81588bec>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:1055 [<ffffffff84396e45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84396e45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888101c62460 (size 32): comm "syz-executor591", pid 8432, jiffies 4294944118 (age 12.410s) hex dump (first 32 bytes): 00 10 dc 00 00 c9 ff ff 20 f0 80 84 ff ff ff ff ........ ....... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81043830>] kmalloc include/linux/slab.h:591 [inline] [<ffffffff81043830>] kzalloc include/linux/slab.h:721 [inline] [<ffffffff81043830>] kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:916 [inline] [<ffffffff81043830>] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4471 [inline] [<ffffffff81043830>] kvm_dev_ioctl+0x710/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4498 [<ffffffff81588bec>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff81588bec>] __do_sys_ioctl fs/ioctl.c:1069 [inline] [<ffffffff81588bec>] __se_sys_ioctl fs/ioctl.c:1055 [inline] [<ffffffff81588bec>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:1055 [<ffffffff84396e45>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84396e45>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
