228 lines
13 KiB
JSON
228 lines
13 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-2026-90308",
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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": "2026-09-11T19:38:34.800Z",
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"datePublished": "2026-09-17T16:08:29.704Z",
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"dateUpdated": "2026-10-30T12:35:06.808Z"
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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": "2026-10-30T12:35:06.808Z"
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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\nRDMA/erdma: Hold QP references for AE and CM processing\n\nAE QP fatal events and iWARP CM paths load QPs from dev->qp_xa\nand then use or reference them outside the xarray lock.\nerdma_destroy_qp() can drop the destroy-path reference and free QP\nresources while such a lookup is in flight.\n\nAdd erdma_qp_get_by_qpn() to acquire a kref under the xarray\nlock with kref_get_unless_zero(). Remove the QP from the xarray\nbefore dropping the destroy-path reference so no new lookup can acquire\nit while destruction waits for existing users."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The UAF is a race between local ib_uverbs_destroy_qp()->erdma_destroy_qp() dropping the QP kref and either ucma_connect()/ucma_accept() (RDMA_USER_CM_CONNECT/ACCEPT -> iw_cm_connect()/iw_cm_accept() -> erdma_connect()/erdma_accept() xa_load of userspace params->qpn) or erdma_comm_irq_handler()->erdma_aeq_event_handler(). The CM QPN is rdma_ucm_conn_param.qp_num, not a remote iWARP/RoCE field.\nAC:L - The attacker who created the QP drives both sides: one thread issues ucma_connect()/ucma_accept() or QP ops that produce an AEQE, while another calls ib_uverbs_destroy_qp(), racing find_qp_by_qpn()/xa_load against the destroy-path erdma_qp_put(). The window (bare xa_load, then kref_get or no get at all) can be retried across many QPs.\nPR:L - ib_uverbs_open() and ucma_open() perform no capability check; uverbs_devnode() and ucma_misc.mode publish /dev/infiniband/uverbs* and /dev/infiniband/rdma_cm as 0666, so an unprivileged user on an ERDMA host can create_qp, RDMA_USER_CM_CONNECT/ACCEPT, and destroy_qp.\nUI:N - The attacker creates the QP via uverbs, issues ucma_connect()/ucma_accept() (or generates an AEQE) and ib_uverbs_destroy_qp() from their own processes; no other user must mount, open, or otherwise act.\nS:U - The use-after-free is of the host kernel's struct erdma_qp (kref, ibqp.event_handler, queue buffers) under the same kernel authority and does not cross a VM, IOMMU, or guest-host boundary.\nC:H - After erdma_destroy_qp() drops the last kref and the RDMA core frees the QP, erdma_aeq_event_handler() still reads qp->ibqp.event_handler and qp_context from the freed object, and erdma_connect() may kref_get a freed QP; a sprayed replacement yields a kernel-memory read primitive.\nI:H - erdma_aeq_event_handler() invokes qp->ibqp.event_handler on the freed erdma_qp, and erdma_connect()/erdma_accept() write qp->cep and take qp->state_lock after a lockless xa_load; reclaiming that object gives a function-pointer call and kernel writes.\nA:H - Using the QP after erdma_qp_put()/wait_for_completion() has released its queues and the ib_qp object causes a kernel oops or panic in erdma_aeq_event_handler() or in erdma_connect()/erdma_accept()."
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}
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]
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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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"drivers/infiniband/hw/erdma/erdma_cm.c",
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"drivers/infiniband/hw/erdma/erdma_eq.c",
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"drivers/infiniband/hw/erdma/erdma_verbs.c",
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"drivers/infiniband/hw/erdma/erdma_verbs.h"
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],
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"versions": [
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{
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"version": "155055771704f8cbb5c176a4309b7dc30a50450c",
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"lessThan": "92101d7bd67cf313d65baede27118614a283f6bf",
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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": "155055771704f8cbb5c176a4309b7dc30a50450c",
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"lessThan": "233f1b7fe2980e4e238fe03dd3ceddfd082cb4c8",
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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": "155055771704f8cbb5c176a4309b7dc30a50450c",
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"lessThan": "6e32f84b63c054e09392153125d7202abab2d14b",
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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": "155055771704f8cbb5c176a4309b7dc30a50450c",
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"lessThan": "ec987c0654651036dad6a42f7fa2a6d7c16a3687",
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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": "155055771704f8cbb5c176a4309b7dc30a50450c",
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"lessThan": "c92686867638cda954fdb2bdbac8a75e3aa6eaae",
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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": "155055771704f8cbb5c176a4309b7dc30a50450c",
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"lessThan": "a52eeff32024f190b3bdc99088c7becccd4fa60b",
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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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"drivers/infiniband/hw/erdma/erdma_cm.c",
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"drivers/infiniband/hw/erdma/erdma_eq.c",
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"drivers/infiniband/hw/erdma/erdma_verbs.c",
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"drivers/infiniband/hw/erdma/erdma_verbs.h"
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],
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"versions": [
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{
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"version": "6.0",
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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": "6.0",
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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": "6.1.191",
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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": "6.6.160",
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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": "6.12.110",
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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": "6.18.52",
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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": "7.2.6",
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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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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.1.191"
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},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/92101d7bd67cf313d65baede27118614a283f6bf"
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},
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{
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"url": "https://git.kernel.org/stable/c/233f1b7fe2980e4e238fe03dd3ceddfd082cb4c8"
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{
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"url": "https://git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b"
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},
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{
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"url": "https://git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687"
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},
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{
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"url": "https://git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae"
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},
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{
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"url": "https://git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b"
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}
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],
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"title": "RDMA/erdma: Hold QP references for AE and CM processing",
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"x_generator": {
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} |