222 lines
12 KiB
JSON
222 lines
12 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-2022-49826",
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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": "2025-05-01T14:05:17.228Z",
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"datePublished": "2025-05-01T14:09:46.145Z",
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"dateUpdated": "2026-08-05T08:56:24.252Z"
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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": "2026-08-05T08:56:24.252Z"
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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\nata: libata-transport: fix double ata_host_put() in ata_tport_add()\n\nIn the error path in ata_tport_add(), when calling put_device(),\nata_tport_release() is called, it will put the refcount of 'ap->host'.\n\nAnd then ata_host_put() is called again, the refcount is decreased\nto 0, ata_host_release() is called, all ports are freed and set to\nnull.\n\nWhen unbinding the device after failure, ata_host_stop() is called\nto release the resources, it leads a null-ptr-deref(), because all\nthe ports all freed and null.\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000008\nCPU: 7 PID: 18671 Comm: modprobe Kdump: loaded Tainted: G E 6.1.0-rc3+ #8\npstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : ata_host_stop+0x3c/0x84 [libata]\nlr : release_nodes+0x64/0xd0\nCall trace:\n ata_host_stop+0x3c/0x84 [libata]\n release_nodes+0x64/0xd0\n devres_release_all+0xbc/0x1b0\n device_unbind_cleanup+0x20/0x70\n really_probe+0x158/0x320\n __driver_probe_device+0x84/0x120\n driver_probe_device+0x44/0x120\n __driver_attach+0xb4/0x220\n bus_for_each_dev+0x78/0xdc\n driver_attach+0x2c/0x40\n bus_add_driver+0x184/0x240\n driver_register+0x80/0x13c\n __pci_register_driver+0x4c/0x60\n ahci_pci_driver_init+0x30/0x1000 [ahci]\n\nFix this by removing redundant ata_host_put() in the error path."
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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 vulnerable path runs during ATA/AHCI/SAS host registration in driver probe (modprobe, sysfs bind, or local hotplug handling), reachable only with local system access rather than network packet processing.\nAC:L - A local attacker can force the ata_tport_add() error path via resource exhaustion (device_add/ata_tlink_add failures) and the subsequent double-put/UAF follows deterministically on that path.\nPR:L - Triggering ATA transport registration is aligned with other scored libata probe/double-free issues as a local low-privilege scenario; when uncertain versus requiring real root, the higher-severity PR:L choice applies.\nUI:N - Exploitation does not require any victim action such as mounting a filesystem or opening a malicious file; the attacker triggers probe/error handling themselves.\nS:U - Impact is confined to the host kernel's memory management and control flow; this is standard kernel memory corruption without crossing a VM, IOMMU, or other security authority boundary.\nC:H - The double ata_host_put() frees the ata_host and its ports, then ata_host_stop() uses the freed object—a use-after-free that can be leveraged for arbitrary kernel read via heap reuse.\nI:H - Use-after-free of ata_host before ata_host_stop() invokes ap->ops callbacks enables heap spraying and control-flow hijacking, so integrity impact is high per UAF guidance.\nA:H - The bug causes a kernel NULL pointer dereference/oops in ata_host_stop() during probe cleanup, which is a full availability impact."
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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/ata/libata-transport.c"
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],
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"versions": [
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{
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"version": "2623c7a5f2799569d8bb05eb211da524a8144cb3",
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"lessThan": "30e12e2be27ac6c4be2af4163c70db381364706f",
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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": "2623c7a5f2799569d8bb05eb211da524a8144cb3",
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"lessThan": "bec9ded5404cb14e5f5470103d0973a2ff83d6a5",
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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": "2623c7a5f2799569d8bb05eb211da524a8144cb3",
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"lessThan": "ac471468f7c16cda2525909946ca13ddbcd14000",
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"status": "affected",
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"versionType": "git"
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{
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"version": "2623c7a5f2799569d8bb05eb211da524a8144cb3",
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"lessThan": "377ff82c33c0cb74562a353361b64b33c09562cf",
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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": "2623c7a5f2799569d8bb05eb211da524a8144cb3",
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"lessThan": "865a6da40ba092c18292ae5f6194756131293745",
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"status": "affected",
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"versionType": "git"
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{
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"version": "2623c7a5f2799569d8bb05eb211da524a8144cb3",
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"lessThan": "8c76310740807ade5ecdab5888f70ecb6d35732e",
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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/ata/libata-transport.c"
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],
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"versions": [
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{
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"version": "4.17",
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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": "4.17",
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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": "4.19.267",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.225",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.156",
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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": "5.15.80",
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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": "6.0.10",
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"lessThanOrEqual": "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",
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.17",
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"versionEndExcluding": "4.19.267"
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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": "4.17",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/30e12e2be27ac6c4be2af4163c70db381364706f"
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},
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{
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"url": "https://git.kernel.org/stable/c/bec9ded5404cb14e5f5470103d0973a2ff83d6a5"
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},
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{
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"url": "https://git.kernel.org/stable/c/ac471468f7c16cda2525909946ca13ddbcd14000"
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},
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{
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"url": "https://git.kernel.org/stable/c/377ff82c33c0cb74562a353361b64b33c09562cf"
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},
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{
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"url": "https://git.kernel.org/stable/c/865a6da40ba092c18292ae5f6194756131293745"
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},
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{
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"url": "https://git.kernel.org/stable/c/8c76310740807ade5ecdab5888f70ecb6d35732e"
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}
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],
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"title": "ata: libata-transport: fix double ata_host_put() in ata_tport_add()",
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