{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: Fix possible access to freed memory in link clear\n\nAfter modifying the QP to the Error state, all RX WR would be completed\nwith WC in IB_WC_WR_FLUSH_ERR status. Current implementation does not\nwait for it is done, but destroy the QP and free the link group directly.\nSo there is a risk that accessing the freed memory in tasklet context.\n\nHere is a crash example:\n\n BUG: unable to handle page fault for address: ffffffff8f220860\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD f7300e067 P4D f7300e067 PUD f7300f063 PMD 8c4e45063 PTE 800ffff08c9df060\n Oops: 0002 [#1] SMP PTI\n CPU: 1 PID: 0 Comm: swapper/1 Kdump: loaded Tainted: G S         OE     5.10.0-0607+ #23\n Hardware name: Inspur NF5280M4/YZMB-00689-101, BIOS 4.1.20 07/09/2018\n RIP: 0010:native_queued_spin_lock_slowpath+0x176/0x1b0\n Code: f3 90 48 8b 32 48 85 f6 74 f6 eb d5 c1 ee 12 83 e0 03 83 ee 01 48 c1 e0 05 48 63 f6 48 05 00 c8 02 00 48 03 04 f5 00 09 98 8e <48> 89 10 8b 42 08 85 c0 75 09 f3 90 8b 42 08 85 c0 74 f7 48 8b 32\n RSP: 0018:ffffb3b6c001ebd8 EFLAGS: 00010086\n RAX: ffffffff8f220860 RBX: 0000000000000246 RCX: 0000000000080000\n RDX: ffff91db1f86c800 RSI: 000000000000173c RDI: ffff91db62bace00\n RBP: ffff91db62bacc00 R08: 0000000000000000 R09: c00000010000028b\n R10: 0000000000055198 R11: ffffb3b6c001ea58 R12: ffff91db80e05010\n R13: 000000000000000a R14: 0000000000000006 R15: 0000000000000040\n FS:  0000000000000000(0000) GS:ffff91db1f840000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: ffffffff8f220860 CR3: 00000001f9580004 CR4: 00000000003706e0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n  <IRQ>\n  _raw_spin_lock_irqsave+0x30/0x40\n  mlx5_ib_poll_cq+0x4c/0xc50 [mlx5_ib]\n  smc_wr_rx_tasklet_fn+0x56/0xa0 [smc]\n  tasklet_action_common.isra.21+0x66/0x100\n  __do_softirq+0xd5/0x29c\n  asm_call_irq_on_stack+0x12/0x20\n  </IRQ>\n  do_softirq_own_stack+0x37/0x40\n  irq_exit_rcu+0x9d/0xa0\n  sysvec_call_function_single+0x34/0x80\n  asm_sysvec_call_function_single+0x12/0x20"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/smc/smc_core.c",
                  "net/smc/smc_core.h",
                  "net/smc/smc_wr.c",
                  "net/smc/smc_wr.h"
               ],
               "versions": [
                  {
                     "version": "bd4ad57718cc",
                     "lessThan": "89fcb70f1acd",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "bd4ad57718cc",
                     "lessThan": "e9b1a4f867ae",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/smc/smc_core.c",
                  "net/smc/smc_core.h",
                  "net/smc/smc_wr.c",
                  "net/smc/smc_wr.h"
               ],
               "versions": [
                  {
                     "version": "4.11",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.11",
                     "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/89fcb70f1acd6b0bbf2f7bfbf45d7aa75a9bdcde"
            },
            {
               "url": "https://git.kernel.org/stable/c/e9b1a4f867ae9c1dbd1d71cd09cbdb3239fb4968"
            }
         ],
         "title": "net/smc: Fix possible access to freed memory in link clear",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2022-48673",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}