{"id":"CVE-2022-50151","summary":"usb: cdns3: fix random warning message when driver load","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 &page-\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.","modified":"2026-04-03T13:14:49.727110Z","published":"2025-06-18T11:03:10.569Z","related":["SUSE-SU-2025:02264-1","SUSE-SU-2025:02321-1","SUSE-SU-2025:02322-1","SUSE-SU-2025:02537-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50151.json"},"references":[{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50151.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50151"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8bc1901ca7b07d864fca11461b3875b31f949765"},{"fixed":"8e142744f0e96abc69ccd99e6d6c7eb662267f21"},{"fixed":"960a8a35a6027a08c4b511435bf59609b5d5e5cd"},{"fixed":"8659ab3d936fcf0084676f98b75b317017aa8f82"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50151.json"}}],"schema_version":"1.7.5"}