{"id":"DEBIAN-CVE-2024-41094","details":"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.","modified":"2026-10-01T09:03:30.201700134Z","published":"2024-07-29T16:15:04.543Z","upstream":["CVE-2024-41094"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-41094"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-41094.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-41094.json"}}],"schema_version":"1.9.0"}