CVE-2022-50151

published 2025-06-18

CVE-2022-50151: In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: fix random warning message when driver load Warning log: [ 4.141392] Unexpected…

Priority P3 37 high 7.8 CVSS 3.1

AV L AC L PR L UI N S U C H I H A H

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] ___slab_alloc.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

10 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.19.6-1 (bookworm)	linux 5.19.6-1 (bookworm)
linux	linux	—	—
linux	linux	>= 8bc1901ca7b07d864fca11461b3875b31f949765 < 8e142744f0e96abc69ccd99e6d6c7eb662267f21	8e142744f0e96abc69ccd99e6d6c7eb662267f21
linux	linux	>= 8bc1901ca7b07d864fca11461b3875b31f949765 < 960a8a35a6027a08c4b511435bf59609b5d5e5cd	960a8a35a6027a08c4b511435bf59609b5d5e5cd
linux	linux	>= 8bc1901ca7b07d864fca11461b3875b31f949765 < 8659ab3d936fcf0084676f98b75b317017aa8f82	8659ab3d936fcf0084676f98b75b317017aa8f82
linux	linux_kernel	>= 0 < 5.19.6-1	5.19.6-1
linux	linux_kernel	>= 0 < 5.19.6-1	5.19.6-1
linux	linux_kernel	>= 0 < 5.19.6-1	5.19.6-1
linux	linux_kernel	>= 5.16 < 5.19.2	5.19.2
linux	linux_kernel	>= 5.3 < 5.15.63	5.15.63

CVSS provenance

nvd v3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

osv 7.8 HIGH

vendor_debian 7.8 HIGH

vendor_redhat 7.8 HIGH

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