248 lines
14 KiB
JSON
248 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-89491",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-11T19:38:34.713Z",
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"datePublished": "2026-09-11T19:43:43.466Z",
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"dateUpdated": "2026-10-19T08:47:43.000Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T08:47:43.000Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin()\n\nPatch series \"ocfs2: cluster: o2hb_region_pin() fixes\", v2.\n\nThis series fixes three related issues in o2hb_region_pin(), all are from\nthe original implementation in commit: 58a3158a5d17 (\"ocfs2/cluster:\nPin/unpin o2hb regions\"):\n\n1) It is called with o2hb_live_lock (a spinlock) held, but the\n underlying configfs_depend_item() sleeps (takes inode rwsem and\n pins the filesystem). This triggers BUG under\n CONFIG_DEBUG_ATOMIC_SLEEP.\n\n2) When called from the configfs drop_item callback, it creates a\n lock order inversion: parent inode_lock -> configfs root\n inode_lock, which can deadlock against subsystem unregistration\n paths taking root -> parent.\n\n3) If pinning fails partway through o2hb_region_inc_user(), the\n o2hb_dependent_users counter is leaked and partially-pinned\n regions are never released, leaving heartbeat regions\n unprotected on subsequent mounts.\n\nPatch 1 reworks o2hb_region_pin() to drop o2hb_live_lock across each\nsleeping configfs_depend_item() call, using a config_item reference to\nkeep the region alive while unlocked.\n\nPatch 2 adds a from_callback parameter to select\nconfigfs_depend_item_unlocked() when called from configfs context,\navoiding the inode_lock nesting.\n\nPatch 3 fixes the error path in o2hb_region_inc_user() to unpin and\ndecrement the counter on failure.\n\n\nThis patch (of 3):\n\no2hb_region_pin() is always called with the o2hb_live_lock spinlock held\n(from o2hb_region_inc_user() and o2hb_heartbeat_group_drop_item()), but it\ncalls o2nm_depend_item() -> configfs_depend_item(), which sleeps: it pins\nthe configfs filesystem and takes the configfs root inode rwsem. Under\nCONFIG_DEBUG_ATOMIC_SLEEP this triggers:\n\n BUG: sleeping function called from invalid context at kernel/locking/rwsem.c\n in_atomic(): 1, ... name: mount.ocfs2\n down_write\n configfs_depend_item\n o2hb_region_pin\n o2hb_region_inc_user\n o2hb_register_callback\n dlm_register_domain_handlers\n ...\n ocfs2_dlm_init\n ocfs2_mount_volume\n ocfs2_fill_super\n\nRework o2hb_region_pin() to pin one region at a time with the lock dropped\nacross the sleeping call: under o2hb_live_lock find the next eligible\nregion and take a config_item reference to keep it alive, drop the lock,\ncall o2nm_depend_item(), then retake the lock and record the pin. The\nconfig_item_put() is done with the lock released as well, since\no2hb_region_release() also acquires o2hb_live_lock and can sleep. The\nregion list may change while unlocked, so the scan restarts from the top\nafter each pin. Local heartbeat still pins only the matching region;\nglobal heartbeat pins all eligible regions.\n\nThe unpin path is unaffected: configfs_undepend_item() only takes a\nspinlock and does not sleep."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/ocfs2/cluster/heartbeat.c"
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],
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"versions": [
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{
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"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
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"lessThan": "4d64f8da82fb9e8dbd5aa9b64c9bb6ac0decea03",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
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"lessThan": "3b790774280a610f8bdbd5d4260a07345bcf8e04",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
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"lessThan": "0cbc2f20a6ea7b4a59efa9171b7c694cdd196507",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
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"lessThan": "c9be4de77f97f383b750698e1517fd296041f4bb",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
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"lessThan": "49002acc520c61002ad195894ac391c94317d3ba",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
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"lessThan": "ce035f208d68b812d83e5482980f2b1c88a9cd94",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
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"lessThan": "470212a5eefabcc16b8e2f7fe2844b8737fe571c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
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"lessThan": "af09df89db9a68a1d76df0f75667998135bc8d65",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/ocfs2/cluster/heartbeat.c"
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],
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"versions": [
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{
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"version": "2.6.38",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "2.6.38",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.109",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.50",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.4",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.38",
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"versionEndExcluding": "5.10.270"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.38",
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"versionEndExcluding": "5.15.221"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.38",
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"versionEndExcluding": "6.1.188"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "6.6.157"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.38",
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"versionEndExcluding": "6.12.109"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.38",
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"versionEndExcluding": "7.2.4"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.38",
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/4d64f8da82fb9e8dbd5aa9b64c9bb6ac0decea03"
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},
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{
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"url": "https://git.kernel.org/stable/c/3b790774280a610f8bdbd5d4260a07345bcf8e04"
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},
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{
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"url": "https://git.kernel.org/stable/c/0cbc2f20a6ea7b4a59efa9171b7c694cdd196507"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9be4de77f97f383b750698e1517fd296041f4bb"
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},
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{
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"url": "https://git.kernel.org/stable/c/49002acc520c61002ad195894ac391c94317d3ba"
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},
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{
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"url": "https://git.kernel.org/stable/c/ce035f208d68b812d83e5482980f2b1c88a9cd94"
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},
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{
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"url": "https://git.kernel.org/stable/c/470212a5eefabcc16b8e2f7fe2844b8737fe571c"
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},
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{
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"url": "https://git.kernel.org/stable/c/af09df89db9a68a1d76df0f75667998135bc8d65"
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}
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],
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"title": "ocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |