{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix pcluster use-after-free on UP platforms\n\nDuring stress testing with CONFIG_SMP disabled, KASAN reports as below:\n\n==================================================================\nBUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30\nRead of size 8 at addr ffff8881094223f8 by task stress/7789\n\nCPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3\nHardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\nCall Trace:\n <TASK>\n..\n __mutex_lock+0xe5/0xc30\n..\n z_erofs_do_read_page+0x8ce/0x1560\n..\n z_erofs_readahead+0x31c/0x580\n..\nFreed by task 7787\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x20/0x30\n kasan_set_free_info+0x20/0x40\n __kasan_slab_free+0x10c/0x190\n kmem_cache_free+0xed/0x380\n rcu_core+0x3d5/0xc90\n __do_softirq+0x12d/0x389\n\nLast potentially related work creation:\n kasan_save_stack+0x1e/0x40\n __kasan_record_aux_stack+0x97/0xb0\n call_rcu+0x3d/0x3f0\n erofs_shrink_workstation+0x11f/0x210\n erofs_shrink_scan+0xdc/0x170\n shrink_slab.constprop.0+0x296/0x530\n drop_slab+0x1c/0x70\n drop_caches_sysctl_handler+0x70/0x80\n proc_sys_call_handler+0x20a/0x2f0\n vfs_write+0x555/0x6c0\n ksys_write+0xbe/0x160\n do_syscall_64+0x3b/0x90\n\nThe root cause is that erofs_workgroup_unfreeze() doesn't reset to\norig_val thus it causes a race that the pcluster reuses unexpectedly\nbefore freeing.\n\nSince UP platforms are quite rare now, such path becomes unnecessary.\nLet's drop such specific-designed path directly instead."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/erofs/internal.h"
               ],
               "versions": [
                  {
                     "version": "73f5c66df3e2",
                     "lessThan": "8ddd001cef5e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "73f5c66df3e2",
                     "lessThan": "94c34faaafe7",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "73f5c66df3e2",
                     "lessThan": "2f44013e3998",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/erofs/internal.h"
               ],
               "versions": [
                  {
                     "version": "5.0",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.0",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.68",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.19.9",
                     "lessThanOrEqual": "5.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.0",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/8ddd001cef5e82d19192e6861068463ecca5f556"
            },
            {
               "url": "https://git.kernel.org/stable/c/94c34faaafe7b55adc2d8d881db195b646959b9e"
            },
            {
               "url": "https://git.kernel.org/stable/c/2f44013e39984c127c6efedf70e6b5f4e9dcf315"
            }
         ],
         "title": "erofs: fix pcluster use-after-free on UP platforms",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2022-48674",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}