GHSA-2RMF-84JJ-472Q
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32In the Linux kernel, the following vulnerability has been resolved:
scsi: ufs: core: Avoid possible memory reclaim deadlock in TX EQTR context
TX EQTR may run while devfreq gear scaling has quiesced the UFS tagset. In that context, functions ufshcd_tx_eqtr(), __ufshcd_tx_eqtr() and ufs_qcom_get_rx_fom() allocate memory with GFP_KERNEL. If direct reclaim is triggered, reclaim/writeback can depend on I/O to UFS device. Because the queue is quiesced, this can cause deadlock.
Use memalloc_noio_save/restore() in ufshcd_tx_eqtr() to cover all allocations in the TX EQTR call tree, including:
-
params->eqtr_record in ufshcd_tx_eqtr()
-
eqtr_data in __ufshcd_tx_eqtr()
-
params in ufs_qcom_get_rx_fom()
This is preferred over tagging individual call sites with GFP_NOIO, as it automatically covers any future allocations added anywhere in the call tree without requiring each caller to be aware of this constraint.
[mkp: fix label as suggested by Bart]
{
"affected": [],
"aliases": [
"CVE-2026-93057"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:59Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ufs: core: Avoid possible memory reclaim deadlock in TX EQTR context\n\nTX EQTR may run while devfreq gear scaling has quiesced the UFS\ntagset. In that context, functions ufshcd_tx_eqtr(), __ufshcd_tx_eqtr()\nand ufs_qcom_get_rx_fom() allocate memory with GFP_KERNEL. If direct\nreclaim is triggered, reclaim/writeback can depend on I/O to UFS\ndevice. Because the queue is quiesced, this can cause deadlock.\n\nUse memalloc_noio_save/restore() in ufshcd_tx_eqtr() to cover all\nallocations in the TX EQTR call tree, including:\n\n - params-\u003eeqtr_record in ufshcd_tx_eqtr()\n\n - eqtr_data in __ufshcd_tx_eqtr()\n\n - params in ufs_qcom_get_rx_fom()\n\nThis is preferred over tagging individual call sites with GFP_NOIO, as it\nautomatically covers any future allocations added anywhere in the call tree\nwithout requiring each caller to be aware of this constraint.\n\n[mkp: fix label as suggested by Bart]",
"id": "GHSA-2rmf-84jj-472q",
"modified": "2026-09-17T18:32:08Z",
"published": "2026-09-17T18:32:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93057"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/760fc6f0e25a72832c2fcf37ecf5f1b770ec8374"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a28a7d9b3bb116da788ae492c90465ec1a7fa6e8"
}
],
"schema_version": "1.4.0",
"severity": []
}
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