ghsa-gvgm-6pph-fj6g
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
usb: cdns3: fix random warning message when driver load
Warning log: [ 4.141392] Unexpected gfp: 0x4 (GFP_DMA32). Fixing up to gfp: 0xa20 (GFP_ATOMIC). Fix your code! [ 4.150340] CPU: 1 PID: 175 Comm: 1-0050 Not tainted 5.15.5-00039-g2fd9ae1b568c #20 [ 4.158010] Hardware name: Freescale i.MX8QXP MEK (DT) [ 4.163155] Call trace: [ 4.165600] dump_backtrace+0x0/0x1b0 [ 4.169286] show_stack+0x18/0x68 [ 4.172611] dump_stack_lvl+0x68/0x84 [ 4.176286] dump_stack+0x18/0x34 [ 4.179613] kmalloc_fix_flags+0x60/0x88 [ 4.183550] new_slab+0x334/0x370 [ 4.186878] slaballoc.part.108+0x4d4/0x748 [ 4.191419] slab_alloc.isra.109+0x30/0x78 [ 4.195702] kmem_cache_alloc+0x40c/0x420 [ 4.199725] dma_pool_alloc+0xac/0x1f8 [ 4.203486] cdns3_allocate_trb_pool+0xb4/0xd0
pool_alloc_page(struct dma_pool pool, gfp_t mem_flags) { ... page = kmalloc(sizeof(page), mem_flags); page->vaddr = dma_alloc_coherent(pool->dev, pool->allocation, &page->dma, mem_flags); ... }
kmalloc was called with mem_flags, which is passed down in cdns3_allocate_trb_pool() and have GFP_DMA32 flags. kmall_fix_flags() report warning.
GFP_DMA32 is not useful at all. dma_alloc_coherent() will handle DMA memory region correctly by pool->dev. GFP_DMA32 can be removed safely.
{
"affected": [],
"aliases": [
"CVE-2022-50151"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T11:15:45Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: fix random warning message when driver load\n\nWarning log:\n[ 4.141392] Unexpected gfp: 0x4 (GFP_DMA32). Fixing up to gfp: 0xa20 (GFP_ATOMIC). Fix your code!\n[ 4.150340] CPU: 1 PID: 175 Comm: 1-0050 Not tainted 5.15.5-00039-g2fd9ae1b568c #20\n[ 4.158010] Hardware name: Freescale i.MX8QXP MEK (DT)\n[ 4.163155] Call trace:\n[ 4.165600] dump_backtrace+0x0/0x1b0\n[ 4.169286] show_stack+0x18/0x68\n[ 4.172611] dump_stack_lvl+0x68/0x84\n[ 4.176286] dump_stack+0x18/0x34\n[ 4.179613] kmalloc_fix_flags+0x60/0x88\n[ 4.183550] new_slab+0x334/0x370\n[ 4.186878] ___slab_alloc.part.108+0x4d4/0x748\n[ 4.191419] __slab_alloc.isra.109+0x30/0x78\n[ 4.195702] kmem_cache_alloc+0x40c/0x420\n[ 4.199725] dma_pool_alloc+0xac/0x1f8\n[ 4.203486] cdns3_allocate_trb_pool+0xb4/0xd0\n\npool_alloc_page(struct dma_pool *pool, gfp_t mem_flags)\n{\n\t...\n\tpage = kmalloc(sizeof(*page), mem_flags);\n\tpage-\u003evaddr = dma_alloc_coherent(pool-\u003edev, pool-\u003eallocation,\n\t\t\t\t\t \u0026page-\u003edma, mem_flags);\n\t...\n}\n\nkmalloc was called with mem_flags, which is passed down in\ncdns3_allocate_trb_pool() and have GFP_DMA32 flags.\nkmall_fix_flags() report warning.\n\nGFP_DMA32 is not useful at all. dma_alloc_coherent() will handle\nDMA memory region correctly by pool-\u003edev. GFP_DMA32 can be removed\nsafely.",
"id": "GHSA-gvgm-6pph-fj6g",
"modified": "2025-06-18T12:30:50Z",
"published": "2025-06-18T12:30:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50151"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8659ab3d936fcf0084676f98b75b317017aa8f82"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8e142744f0e96abc69ccd99e6d6c7eb662267f21"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/960a8a35a6027a08c4b511435bf59609b5d5e5cd"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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