Description

In the Linux kernel, the following vulnerability has been resolved: drm/fbdev-dma: Only set smem_start is enable per module option Only export struct fb_info.fix.smem_start if that is required by the user and the memory does not come from vmalloc(). Setting struct fb_info.fix.smem_start breaks systems where DMA memory is backed by vmalloc address space. An example error is shown below. [ 3.536043] ------------[ cut here ]------------ [ 3.540716] virt_to_phys used for non-linear address: 000000007fc4f540 (0xffff800086001000) [ 3.552628] WARNING: CPU: 4 PID: 61 at arch/arm64/mm/physaddr.c:12 __virt_to_phys+0x68/0x98 [ 3.565455] Modules linked in: [ 3.568525] CPU: 4 PID: 61 Comm: kworker/u12:5 Not tainted 6.6.23-06226-g4986cc3e1b75-dirty #250 [ 3.577310] Hardware name: NXP i.MX95 19X19 board (DT) [ 3.582452] Workqueue: events_unbound deferred_probe_work_func [ 3.588291] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 3.595233] pc : __virt_to_phys+0x68/0x98 [ 3.599246] lr : __virt_to_phys+0x68/0x98 [ 3.603276] sp : ffff800083603990 [ 3.677939] Call trace: [ 3.680393] __virt_to_phys+0x68/0x98 [ 3.684067] drm_fbdev_dma_helper_fb_probe+0x138/0x238 [ 3.689214] __drm_fb_helper_initial_config_and_unlock+0x2b0/0x4c0 [ 3.695385] drm_fb_helper_initial_config+0x4c/0x68 [ 3.700264] drm_fbdev_dma_client_hotplug+0x8c/0xe0 [ 3.705161] drm_client_register+0x60/0xb0 [ 3.709269] drm_fbdev_dma_setup+0x94/0x148 Additionally, DMA memory is assumed to by contiguous in physical address space, which is not guaranteed by vmalloc(). Resolve this by checking the module flag drm_leak_fbdev_smem when DRM allocated the instance of struct fb_info. Fbdev-dma then only sets smem_start only if required (via FBINFO_HIDE_SMEM_START). Also guarantee that the framebuffer is not located in vmalloc address space.

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

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CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  5.5 MEDIUM

Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

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Hyperlink	Resource
https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebde	Patch
https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebde	Patch
https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01	Patch
https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01	Patch
https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5	Patch
https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

CVE Modified by CVE 11/21/2024 4:32:13 AM

Action	Type	Old Value	New Value
Added	Reference		https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebde
Added	Reference		https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01
Added	Reference		https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5

Initial Analysis by NIST 8/22/2024 9:15:40 AM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST NVD-CWE-noinfo
Added	CPE Configuration		OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.4 up to (excluding) 6.6.37 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.9.8
Changed	Reference Type	https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebde No Types Assigned	https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebde Patch
Changed	Reference Type	https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01 No Types Assigned	https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5 No Types Assigned	https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5 Patch

New CVE Received from kernel.org 7/29/2024 12:15:04 PM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 1889 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: drm/fbdev-dma: Only set smem_start is enable per module option Only export struct fb_info.fix.smem_start if that is required by the user and the memory does not come from vmalloc(). Setting struct fb_info.fix.smem_start breaks systems where DMA memory is backed by vmalloc address space. An example error is shown below. [ 3.536043] ------------[ cut here ]------------ [ 3.540716] virt_to_phys used for non-linear address
Added	Reference		kernel.org https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebde [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5 [No types assigned]