{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio\n\nBUG: KASAN: use-after-free in kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:183\nRead of size 8 at addr ffff0000c03a2500 by task syz-executor083/4269\n\nCPU: 5 PID: 4269 Comm: syz-executor083 Not tainted 5.10.0 #7\nHardware name: linux,dummy-virt (DT)\nCall trace:\n dump_backtrace+0x0/0x2d0 arch/arm64/kernel/stacktrace.c:132\n show_stack+0x28/0x34 arch/arm64/kernel/stacktrace.c:196\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0x110/0x164 lib/dump_stack.c:118\n print_address_description+0x78/0x5c8 mm/kasan/report.c:385\n __kasan_report mm/kasan/report.c:545 [inline]\n kasan_report+0x148/0x1e4 mm/kasan/report.c:562\n check_memory_region_inline mm/kasan/generic.c:183 [inline]\n __asan_load8+0xb4/0xbc mm/kasan/generic.c:252\n kvm_vm_ioctl_unregister_coalesced_mmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:183\n kvm_vm_ioctl+0xe30/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3755\n vfs_ioctl fs/ioctl.c:48 [inline]\n __do_sys_ioctl fs/ioctl.c:753 [inline]\n __se_sys_ioctl fs/ioctl.c:739 [inline]\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\n invoke_syscall arch/arm64/kernel/syscall.c:48 [inline]\n el0_svc_common arch/arm64/kernel/syscall.c:158 [inline]\n do_el0_svc+0x120/0x290 arch/arm64/kernel/syscall.c:220\n el0_svc+0x1c/0x28 arch/arm64/kernel/entry-common.c:367\n el0_sync_handler+0x98/0x170 arch/arm64/kernel/entry-common.c:383\n el0_sync+0x140/0x180 arch/arm64/kernel/entry.S:670\n\nAllocated by task 4269:\n stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121\n kasan_save_stack mm/kasan/common.c:48 [inline]\n kasan_set_track mm/kasan/common.c:56 [inline]\n __kasan_kmalloc+0xdc/0x120 mm/kasan/common.c:461\n kasan_kmalloc+0xc/0x14 mm/kasan/common.c:475\n kmem_cache_alloc_trace include/linux/slab.h:450 [inline]\n kmalloc include/linux/slab.h:552 [inline]\n kzalloc include/linux/slab.h:664 [inline]\n kvm_vm_ioctl_register_coalesced_mmio+0x78/0x1cc arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:146\n kvm_vm_ioctl+0x7e8/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3746\n vfs_ioctl fs/ioctl.c:48 [inline]\n __do_sys_ioctl fs/ioctl.c:753 [inline]\n __se_sys_ioctl fs/ioctl.c:739 [inline]\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\n invoke_syscall arch/arm64/kernel/syscall.c:48 [inline]\n el0_svc_common arch/arm64/kernel/syscall.c:158 [inline]\n do_el0_svc+0x120/0x290 arch/arm64/kernel/syscall.c:220\n el0_svc+0x1c/0x28 arch/arm64/kernel/entry-common.c:367\n el0_sync_handler+0x98/0x170 arch/arm64/kernel/entry-common.c:383\n el0_sync+0x140/0x180 arch/arm64/kernel/entry.S:670\n\nFreed by task 4269:\n stack_trace_save+0x80/0xb8 kernel/stacktrace.c:121\n kasan_save_stack mm/kasan/common.c:48 [inline]\n kasan_set_track+0x38/0x6c mm/kasan/common.c:56\n kasan_set_free_info+0x20/0x40 mm/kasan/generic.c:355\n __kasan_slab_free+0x124/0x150 mm/kasan/common.c:422\n kasan_slab_free+0x10/0x1c mm/kasan/common.c:431\n slab_free_hook mm/slub.c:1544 [inline]\n slab_free_freelist_hook mm/slub.c:1577 [inline]\n slab_free mm/slub.c:3142 [inline]\n kfree+0x104/0x38c mm/slub.c:4124\n coalesced_mmio_destructor+0x94/0xa4 arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:102\n kvm_iodevice_destructor include/kvm/iodev.h:61 [inline]\n kvm_io_bus_unregister_dev+0x248/0x280 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:4374\n kvm_vm_ioctl_unregister_coalesced_mmio+0x158/0x1ec arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.c:186\n kvm_vm_ioctl+0xe30/0x14c4 arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3755\n vfs_ioctl fs/ioctl.c:48 [inline]\n __do_sys_ioctl fs/ioctl.c:753 [inline]\n __se_sys_ioctl fs/ioctl.c:739 [inline]\n __arm64_sys_ioctl+0xf88/0x131c fs/ioctl.c:739\n __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]\n invoke_syscall arch/arm64/kernel/sys\n---truncated---"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "virt/kvm/coalesced_mmio.c"
               ],
               "versions": [
                  {
                     "version": "7d1bc32d6477",
                     "lessThan": "f2ff9d03432f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2a20592baff5",
                     "lessThan": "679837dc0aba",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "50cbad42bfea",
                     "lessThan": "8d7c539316d6",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "5d3c4c79384a",
                     "lessThan": "069d44a24c0f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "5d3c4c79384a",
                     "lessThan": "23fa2e46a555",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "virt/kvm/coalesced_mmio.c"
               ],
               "versions": [
                  {
                     "version": "5.13",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.13",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.134",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.52",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.19",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.13.4",
                     "lessThanOrEqual": "5.13.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.14",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/f2ff9d03432fcb160e9f7d4be26174d89de2779a"
            },
            {
               "url": "https://git.kernel.org/stable/c/679837dc0abaa2c6e2a7bcd86483e05eee1d5066"
            },
            {
               "url": "https://git.kernel.org/stable/c/8d7c539316d652d217e5e82b89ee204c812a7061"
            },
            {
               "url": "https://git.kernel.org/stable/c/069d44a24c0ff8f85adf49233aae7a8ca16f5c7e"
            },
            {
               "url": "https://git.kernel.org/stable/c/23fa2e46a5556f787ce2ea1a315d3ab93cced204"
            }
         ],
         "title": "KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47341",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}