CVE-2022-49337 (GCVE-0-2022-49337)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2025-12-23 13:23
VLAI?
Title
ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock When user_dlm_destroy_lock failed, it didn't clean up the flags it set before exit. For USER_LOCK_IN_TEARDOWN, if this function fails because of lock is still in used, next time when unlink invokes this function, it will return succeed, and then unlink will remove inode and dentry if lock is not in used(file closed), but the dlm lock is still linked in dlm lock resource, then when bast come in, it will trigger a panic due to user-after-free. See the following panic call trace. To fix this, USER_LOCK_IN_TEARDOWN should be reverted if fail. And also error should be returned if USER_LOCK_IN_TEARDOWN is set to let user know that unlink fail. For the case of ocfs2_dlm_unlock failure, besides USER_LOCK_IN_TEARDOWN, USER_LOCK_BUSY is also required to be cleared. Even though spin lock is released in between, but USER_LOCK_IN_TEARDOWN is still set, for USER_LOCK_BUSY, if before every place that waits on this flag, USER_LOCK_IN_TEARDOWN is checked to bail out, that will make sure no flow waits on the busy flag set by user_dlm_destroy_lock(), then we can simplely revert USER_LOCK_BUSY when ocfs2_dlm_unlock fails. Fix user_dlm_cluster_lock() which is the only function not following this. [ 941.336392] (python,26174,16):dlmfs_unlink:562 ERROR: unlink 004fb0000060000b5a90b8c847b72e1, error -16 from destroy [ 989.757536] ------------[ cut here ]------------ [ 989.757709] kernel BUG at fs/ocfs2/dlmfs/userdlm.c:173! [ 989.757876] invalid opcode: 0000 [#1] SMP [ 989.758027] Modules linked in: ksplice_2zhuk2jr_ib_ipoib_new(O) ksplice_2zhuk2jr(O) mptctl mptbase xen_netback xen_blkback xen_gntalloc xen_gntdev xen_evtchn cdc_ether usbnet mii ocfs2 jbd2 rpcsec_gss_krb5 auth_rpcgss nfsv4 nfsv3 nfs_acl nfs fscache lockd grace ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue configfs bnx2fc fcoe libfcoe libfc scsi_transport_fc sunrpc ipmi_devintf bridge stp llc rds_rdma rds bonding ib_sdp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm falcon_lsm_serviceable(PE) falcon_nf_netcontain(PE) mlx4_vnic falcon_kal(E) falcon_lsm_pinned_13402(E) mlx4_ib ib_sa ib_mad ib_core ib_addr xenfs xen_privcmd dm_multipath iTCO_wdt iTCO_vendor_support pcspkr sb_edac edac_core i2c_i801 lpc_ich mfd_core ipmi_ssif i2c_core ipmi_si ipmi_msghandler [ 989.760686] ioatdma sg ext3 jbd mbcache sd_mod ahci libahci ixgbe dca ptp pps_core vxlan udp_tunnel ip6_udp_tunnel megaraid_sas mlx4_core crc32c_intel be2iscsi bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi ipv6 cxgb3 mdio libiscsi_tcp qla4xxx iscsi_boot_sysfs libiscsi scsi_transport_iscsi wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: ksplice_2zhuk2jr_ib_ipoib_old] [ 989.761987] CPU: 10 PID: 19102 Comm: dlm_thread Tainted: P OE 4.1.12-124.57.1.el6uek.x86_64 #2 [ 989.762290] Hardware name: Oracle Corporation ORACLE SERVER X5-2/ASM,MOTHERBOARD,1U, BIOS 30350100 06/17/2021 [ 989.762599] task: ffff880178af6200 ti: ffff88017f7c8000 task.ti: ffff88017f7c8000 [ 989.762848] RIP: e030:[<ffffffffc07d4316>] [<ffffffffc07d4316>] __user_dlm_queue_lockres.part.4+0x76/0x80 [ocfs2_dlmfs] [ 989.763185] RSP: e02b:ffff88017f7cbcb8 EFLAGS: 00010246 [ 989.763353] RAX: 0000000000000000 RBX: ffff880174d48008 RCX: 0000000000000003 [ 989.763565] RDX: 0000000000120012 RSI: 0000000000000003 RDI: ffff880174d48170 [ 989.763778] RBP: ffff88017f7cbcc8 R08: ffff88021f4293b0 R09: 0000000000000000 [ 989.763991] R10: ffff880179c8c000 R11: 0000000000000003 R12: ffff880174d48008 [ 989.764204] R13: 0000000000000003 R14: ffff880179c8c000 R15: ffff88021db7a000 [ 989.764422] FS: 0000000000000000(0000) GS:ffff880247480000(0000) knlGS:ffff880247480000 [ 989.764685] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 989.764865] CR2: ffff8000007f6800 CR3: 0000000001ae0000 CR4: 0000000000042660 [ 989.765081] Stack: [ 989.765167] 00000000000 ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < 1434cd71ad9f3a6beda3036972983b6c4869207c (git)
Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < 02480e2e82ae0e5588374bbbcf4fa6e4959fa174 (git)
Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < 733a35c00ef363a1c774d7ea486e0735b7c13a15 (git)
Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < 82bf8e7271fade40184177cb406203addc34c4a0 (git)
Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < 337e36550788dbe03254f0593a231c1c4873b20d (git)
Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < 9c96238fac045b289993d7bc5aae7b2d72b25c76 (git)
Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < efb54ec548829e1d3605f0434526f86e345b1b28 (git)
Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < 2c5e26a626fe46675bceba853e12aaf13c712e10 (git)
Affected: 2cd9888590c52ac7592e3607d0a3174ccd57ef86 , < 863e0d81b6683c4cbc588ad831f560c90e494bef (git)
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    Linux Linux Affected: 2.6.17
Unaffected: 0 , < 2.6.17 (semver)
Unaffected: 4.9.318 , ≤ 4.9.* (semver)
Unaffected: 4.14.283 , ≤ 4.14.* (semver)
Unaffected: 4.19.247 , ≤ 4.19.* (semver)
Unaffected: 5.4.198 , ≤ 5.4.* (semver)
Unaffected: 5.10.121 , ≤ 5.10.* (semver)
Unaffected: 5.15.46 , ≤ 5.15.* (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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{
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              "status": "unaffected",
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              "status": "unaffected",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: dlmfs: fix error handling of user_dlm_destroy_lock\n\nWhen user_dlm_destroy_lock failed, it didn\u0027t clean up the flags it set\nbefore exit.  For USER_LOCK_IN_TEARDOWN, if this function fails because of\nlock is still in used, next time when unlink invokes this function, it\nwill return succeed, and then unlink will remove inode and dentry if lock\nis not in used(file closed), but the dlm lock is still linked in dlm lock\nresource, then when bast come in, it will trigger a panic due to\nuser-after-free.  See the following panic call trace.  To fix this,\nUSER_LOCK_IN_TEARDOWN should be reverted if fail.  And also error should\nbe returned if USER_LOCK_IN_TEARDOWN is set to let user know that unlink\nfail.\n\nFor the case of ocfs2_dlm_unlock failure, besides USER_LOCK_IN_TEARDOWN,\nUSER_LOCK_BUSY is also required to be cleared.  Even though spin lock is\nreleased in between, but USER_LOCK_IN_TEARDOWN is still set, for\nUSER_LOCK_BUSY, if before every place that waits on this flag,\nUSER_LOCK_IN_TEARDOWN is checked to bail out, that will make sure no flow\nwaits on the busy flag set by user_dlm_destroy_lock(), then we can\nsimplely revert USER_LOCK_BUSY when ocfs2_dlm_unlock fails.  Fix\nuser_dlm_cluster_lock() which is the only function not following this.\n\n[  941.336392] (python,26174,16):dlmfs_unlink:562 ERROR: unlink\n004fb0000060000b5a90b8c847b72e1, error -16 from destroy\n[  989.757536] ------------[ cut here ]------------\n[  989.757709] kernel BUG at fs/ocfs2/dlmfs/userdlm.c:173!\n[  989.757876] invalid opcode: 0000 [#1] SMP\n[  989.758027] Modules linked in: ksplice_2zhuk2jr_ib_ipoib_new(O)\nksplice_2zhuk2jr(O) mptctl mptbase xen_netback xen_blkback xen_gntalloc\nxen_gntdev xen_evtchn cdc_ether usbnet mii ocfs2 jbd2 rpcsec_gss_krb5\nauth_rpcgss nfsv4 nfsv3 nfs_acl nfs fscache lockd grace ocfs2_dlmfs\nocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue configfs bnx2fc\nfcoe libfcoe libfc scsi_transport_fc sunrpc ipmi_devintf bridge stp llc\nrds_rdma rds bonding ib_sdp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad\nrdma_cm ib_cm iw_cm falcon_lsm_serviceable(PE) falcon_nf_netcontain(PE)\nmlx4_vnic falcon_kal(E) falcon_lsm_pinned_13402(E) mlx4_ib ib_sa ib_mad\nib_core ib_addr xenfs xen_privcmd dm_multipath iTCO_wdt iTCO_vendor_support\npcspkr sb_edac edac_core i2c_i801 lpc_ich mfd_core ipmi_ssif i2c_core ipmi_si\nipmi_msghandler\n[  989.760686]  ioatdma sg ext3 jbd mbcache sd_mod ahci libahci ixgbe dca ptp\npps_core vxlan udp_tunnel ip6_udp_tunnel megaraid_sas mlx4_core crc32c_intel\nbe2iscsi bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi ipv6 cxgb3 mdio\nlibiscsi_tcp qla4xxx iscsi_boot_sysfs libiscsi scsi_transport_iscsi wmi\ndm_mirror dm_region_hash dm_log dm_mod [last unloaded:\nksplice_2zhuk2jr_ib_ipoib_old]\n[  989.761987] CPU: 10 PID: 19102 Comm: dlm_thread Tainted: P           OE\n4.1.12-124.57.1.el6uek.x86_64 #2\n[  989.762290] Hardware name: Oracle Corporation ORACLE SERVER\nX5-2/ASM,MOTHERBOARD,1U, BIOS 30350100 06/17/2021\n[  989.762599] task: ffff880178af6200 ti: ffff88017f7c8000 task.ti:\nffff88017f7c8000\n[  989.762848] RIP: e030:[\u003cffffffffc07d4316\u003e]  [\u003cffffffffc07d4316\u003e]\n__user_dlm_queue_lockres.part.4+0x76/0x80 [ocfs2_dlmfs]\n[  989.763185] RSP: e02b:ffff88017f7cbcb8  EFLAGS: 00010246\n[  989.763353] RAX: 0000000000000000 RBX: ffff880174d48008 RCX:\n0000000000000003\n[  989.763565] RDX: 0000000000120012 RSI: 0000000000000003 RDI:\nffff880174d48170\n[  989.763778] RBP: ffff88017f7cbcc8 R08: ffff88021f4293b0 R09:\n0000000000000000\n[  989.763991] R10: ffff880179c8c000 R11: 0000000000000003 R12:\nffff880174d48008\n[  989.764204] R13: 0000000000000003 R14: ffff880179c8c000 R15:\nffff88021db7a000\n[  989.764422] FS:  0000000000000000(0000) GS:ffff880247480000(0000)\nknlGS:ffff880247480000\n[  989.764685] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  989.764865] CR2: ffff8000007f6800 CR3: 0000000001ae0000 CR4:\n0000000000042660\n[  989.765081] Stack:\n[  989.765167]  00000000000\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-23T13:23:42.277Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1434cd71ad9f3a6beda3036972983b6c4869207c"
        },
        {
          "url": "https://git.kernel.org/stable/c/02480e2e82ae0e5588374bbbcf4fa6e4959fa174"
        },
        {
          "url": "https://git.kernel.org/stable/c/733a35c00ef363a1c774d7ea486e0735b7c13a15"
        },
        {
          "url": "https://git.kernel.org/stable/c/82bf8e7271fade40184177cb406203addc34c4a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/337e36550788dbe03254f0593a231c1c4873b20d"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c96238fac045b289993d7bc5aae7b2d72b25c76"
        },
        {
          "url": "https://git.kernel.org/stable/c/efb54ec548829e1d3605f0434526f86e345b1b28"
        },
        {
          "url": "https://git.kernel.org/stable/c/2c5e26a626fe46675bceba853e12aaf13c712e10"
        },
        {
          "url": "https://git.kernel.org/stable/c/863e0d81b6683c4cbc588ad831f560c90e494bef"
        }
      ],
      "title": "ocfs2: dlmfs: fix error handling of user_dlm_destroy_lock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49337",
    "datePublished": "2025-02-26T02:10:55.696Z",
    "dateReserved": "2025-02-26T02:08:31.539Z",
    "dateUpdated": "2025-12-23T13:23:42.277Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.