CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-26607 – drm/bridge: sii902x: Fix probing race issue
https://notcve.org/view.php?id=CVE-2024-26607
In the Linux kernel, the following vulnerability has been resolved: drm/bridge: sii902x: Fix probing race issue A null pointer dereference crash has been observed rarely on TI platforms using sii9022 bridge: [ 53.271356] sii902x_get_edid+0x34/0x70 [sii902x] [ 53.276066] sii902x_bridge_get_edid+0x14/0x20 [sii902x] [ 53.281381] drm_bridge_get_edid+0x20/0x34 [drm] [ 53.286305] drm_bridge_connector_get_modes+0x8c/0xcc [drm_kms_helper] [ 53.292955] drm_helper_probe_single_connector_modes+0x190/0x538 [drm_kms_helper] [ 53.300510] drm_client_modeset_probe+0x1f0/0xbd4 [drm] [ 53.305958] __drm_fb_helper_initial_config_and_unlock+0x50/0x510 [drm_kms_helper] [ 53.313611] drm_fb_helper_initial_config+0x48/0x58 [drm_kms_helper] [ 53.320039] drm_fbdev_dma_client_hotplug+0x84/0xd4 [drm_dma_helper] [ 53.326401] drm_client_register+0x5c/0xa0 [drm] [ 53.331216] drm_fbdev_dma_setup+0xc8/0x13c [drm_dma_helper] [ 53.336881] tidss_probe+0x128/0x264 [tidss] [ 53.341174] platform_probe+0x68/0xc4 [ 53.344841] really_probe+0x188/0x3c4 [ 53.348501] __driver_probe_device+0x7c/0x16c [ 53.352854] driver_probe_device+0x3c/0x10c [ 53.357033] __device_attach_driver+0xbc/0x158 [ 53.361472] bus_for_each_drv+0x88/0xe8 [ 53.365303] __device_attach+0xa0/0x1b4 [ 53.369135] device_initial_probe+0x14/0x20 [ 53.373314] bus_probe_device+0xb0/0xb4 [ 53.377145] deferred_probe_work_func+0xcc/0x124 [ 53.381757] process_one_work+0x1f0/0x518 [ 53.385770] worker_thread+0x1e8/0x3dc [ 53.389519] kthread+0x11c/0x120 [ 53.392750] ret_from_fork+0x10/0x20 The issue here is as follows: - tidss probes, but is deferred as sii902x is still missing. - sii902x starts probing and enters sii902x_init(). - sii902x calls drm_bridge_add(). Now the sii902x bridge is ready from DRM's perspective. - sii902x calls sii902x_audio_codec_init() and platform_device_register_data() - The registration of the audio platform device causes probing of the deferred devices. - tidss probes, which eventually causes sii902x_bridge_get_edid() to be called. - sii902x_bridge_get_edid() tries to use the i2c to read the edid. However, the sii902x driver has not set up the i2c part yet, leading to the crash. Fix this by moving the drm_bridge_add() to the end of the sii902x_init(), which is also at the very end of sii902x_probe(). En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/bridge: sii902x: soluciona el problema de carrera de sondeo. Rara vez se ha observado un fallo de desreferencia de puntero nulo en plataformas TI que utilizan el puente sii9022: [ 53.271356] sii902x_get_edid+0x34/0x70 [sii902x] [ 53.276066] sii902x_bridge_get_edid+0x14/0x20 [sii902x] [ 53.281381] drm_bridge_get_edid+0x20/0x34 [drm] [ 53.286305] drm_bridge_connector_get_modes+0x8c/0xcc [drm_kms_helper] [ 53 .292955] drm_helper_probe_single_connector_modes+0x190/0x538 [drm_kms_helper] [ 53.300510] drm_client_modeset_probe+0x1f0/ 0xbd4 [drm] [ 53.305958] __drm_fb_helper_initial_config_and_unlock+0x50/0x510 [drm_kms_helper] [ 53.313611] drm_fb_helper_initial_config+0x48/0x58 [drm_kms_helper] [ 53.320039] drm_f bdev_dma_client_hotplug+0x84/0xd4 [drm_dma_helper] [ 53.326401] drm_client_register+0x5c/0xa0 [drm] [ 53.331216 ] drm_fbdev_dma_setup+0xc8/0x13c [drm_dma_helper] [ 53.336881] tidss_probe+0x128/0x264 [tidss] [ 53.341174] platform_probe+0x68/0xc4 [ 53.344841] very_probe+0x188/0x3 c4 [ 53.348501] __driver_probe_device+0x7c/0x16c [ 53.352854] driver_probe_device+0x3c /0x10c [ 53.357033] __device_attach_driver+0xbc/0x158 [ 53.361472] bus_for_each_drv+0x88/0xe8 [ 53.365303] __device_attach+0xa0/0x1b4 [ 53.369135] dispositivo_initial_probe+0x14/0 x20 [ 53.373314] dispositivo_probe_bus+0xb0/0xb4 [ 53.377145] función_trabajo_probe_diferida+0xcc/0x124 [ 53.381757] Process_one_work+0x1f0/0x518 [ 53.385770] Worker_thread+0x1e8/0x3dc [ 53.389519] kthread+0x11c/0x120 [ 53.392750] ret_from_fork+0x10/0x20 El problema aquí es el siguiente: - tids s, pero se pospone ya que sii902x todavía está desaparecido. - sii902x comienza a sondear e ingresa sii902x_init(). - sii902x llama a drm_bridge_add(). Ahora el puente sii902x está listo desde la perspectiva de DRM. - sii902x llama a sii902x_audio_codec_init() y platform_device_register_data() - El registro del dispositivo de plataforma de audio provoca el sondeo de los dispositivos diferidos. - sondas tidss, que eventualmente provocan que se llame a sii902x_bridge_get_edid(). - sii902x_bridge_get_edid() intenta usar i2c para leer el edit. • https://git.kernel.org/stable/c/21d808405fe49028036932dd969920f4fee4f481 https://git.kernel.org/stable/c/e0f83c234ea7a3dec1f84e5d02caa1c51664a076 https://git.kernel.org/stable/c/56f96cf6eb11a1c2d594367c3becbfb06a855ec1 https://git.kernel.org/stable/c/2a4c6af7934a7b4c304542c38fee35e09cc1770c https://git.kernel.org/stable/c/08ac6f132dd77e40f786d8af51140c96c6d739c9 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2023-52484 – iommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range
https://notcve.org/view.php?id=CVE-2023-52484
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range When running an SVA case, the following soft lockup is triggered: -------------------------------------------------------------------- watchdog: BUG: soft lockup - CPU#244 stuck for 26s! pstate: 83400009 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : arm_smmu_cmdq_issue_cmdlist+0x178/0xa50 lr : arm_smmu_cmdq_issue_cmdlist+0x150/0xa50 sp : ffff8000d83ef290 x29: ffff8000d83ef290 x28: 000000003b9aca00 x27: 0000000000000000 x26: ffff8000d83ef3c0 x25: da86c0812194a0e8 x24: 0000000000000000 x23: 0000000000000040 x22: ffff8000d83ef340 x21: ffff0000c63980c0 x20: 0000000000000001 x19: ffff0000c6398080 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: ffff3000b4a3bbb0 x14: ffff3000b4a30888 x13: ffff3000b4a3cf60 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : ffffc08120e4d6bc x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000048cfa x5 : 0000000000000000 x4 : 0000000000000001 x3 : 000000000000000a x2 : 0000000080000000 x1 : 0000000000000000 x0 : 0000000000000001 Call trace: arm_smmu_cmdq_issue_cmdlist+0x178/0xa50 __arm_smmu_tlb_inv_range+0x118/0x254 arm_smmu_tlb_inv_range_asid+0x6c/0x130 arm_smmu_mm_invalidate_range+0xa0/0xa4 __mmu_notifier_invalidate_range_end+0x88/0x120 unmap_vmas+0x194/0x1e0 unmap_region+0xb4/0x144 do_mas_align_munmap+0x290/0x490 do_mas_munmap+0xbc/0x124 __vm_munmap+0xa8/0x19c __arm64_sys_munmap+0x28/0x50 invoke_syscall+0x78/0x11c el0_svc_common.constprop.0+0x58/0x1c0 do_el0_svc+0x34/0x60 el0_svc+0x2c/0xd4 el0t_64_sync_handler+0x114/0x140 el0t_64_sync+0x1a4/0x1a8 -------------------------------------------------------------------- Note that since 6.6-rc1 the arm_smmu_mm_invalidate_range above is renamed to "arm_smmu_mm_arch_invalidate_secondary_tlbs", yet the problem remains. The commit 06ff87bae8d3 ("arm64: mm: remove unused functions and variable protoypes") fixed a similar lockup on the CPU MMU side. Yet, it can occur to SMMU too, since arm_smmu_mm_arch_invalidate_secondary_tlbs() is called typically next to MMU tlb flush function, e.g. tlb_flush_mmu_tlbonly { tlb_flush { __flush_tlb_range { // check MAX_TLBI_OPS } } mmu_notifier_arch_invalidate_secondary_tlbs { arm_smmu_mm_arch_invalidate_secondary_tlbs { // does not check MAX_TLBI_OPS } } } Clone a CMDQ_MAX_TLBI_OPS from the MAX_TLBI_OPS in tlbflush.h, since in an SVA case SMMU uses the CPU page table, so it makes sense to align with the tlbflush code. Then, replace per-page TLBI commands with a single per-asid TLBI command, if the request size hits this threshold. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: iommu/arm-smmu-v3: Corrección del bloqueo suave activado por arm_smmu_mm_invalidate_range Cuando se ejecuta un caso SVA, se activa el siguiente bloqueo suave: ----------- -------------------------------------------------- ------- perro guardián: ERROR: bloqueo suave - ¡CPU#244 bloqueada durante 26 segundos! • https://git.kernel.org/stable/c/f5a604757aa8e37ea9c7011dc9da54fa1b30f29b https://git.kernel.org/stable/c/f90f4c562003ac3d3b135c5a40a5383313f27264 https://git.kernel.org/stable/c/3283a1bce9bbc978059f790b84f3c10c32492429 https://git.kernel.org/stable/c/d5afb4b47e13161b3f33904d45110f9e6463bad6 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2023-52483 – mctp: perform route lookups under a RCU read-side lock
https://notcve.org/view.php?id=CVE-2023-52483
In the Linux kernel, the following vulnerability has been resolved: mctp: perform route lookups under a RCU read-side lock Our current route lookups (mctp_route_lookup and mctp_route_lookup_null) traverse the net's route list without the RCU read lock held. This means the route lookup is subject to preemption, resulting in an potential grace period expiry, and so an eventual kfree() while we still have the route pointer. Add the proper read-side critical section locks around the route lookups, preventing premption and a possible parallel kfree. The remaining net->mctp.routes accesses are already under a rcu_read_lock, or protected by the RTNL for updates. Based on an analysis from Sili Luo <rootlab@huawei.com>, where introducing a delay in the route lookup could cause a UAF on simultaneous sendmsg() and route deletion. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: mctp: realiza búsquedas de rutas bajo un bloqueo del lado de lectura de RCU. Nuestras búsquedas de rutas actuales (mctp_route_lookup y mctp_route_lookup_null) atraviesan la lista de rutas de la red sin que se mantenga el bloqueo de lectura de RCU. Esto significa que la búsqueda de ruta está sujeta a preferencia, lo que resulta en una posible expiración del período de gracia y, por lo tanto, en un eventual kfree() mientras todavía tenemos el puntero de ruta. • https://git.kernel.org/stable/c/889b7da23abf92faf34491df95733bda63639e32 https://git.kernel.org/stable/c/6c52b12159049046483fdb0c411a0a1869c41a67 https://git.kernel.org/stable/c/1db0724a01b558feb1ecae551782add1951a114a https://git.kernel.org/stable/c/2405f64a95a7a094eb24cba9bcfaffd1ea264de4 https://git.kernel.org/stable/c/5093bbfc10ab6636b32728e35813cbd79feb063c •
CVSS: 6.7EPSS: 0%CPEs: 5EXPL: 0CVE-2023-52482 – x86/srso: Add SRSO mitigation for Hygon processors
https://notcve.org/view.php?id=CVE-2023-52482
In the Linux kernel, the following vulnerability has been resolved: x86/srso: Add SRSO mitigation for Hygon processors Add mitigation for the speculative return stack overflow vulnerability which exists on Hygon processors too. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: x86/srso: agregue mitigación SRSO para procesadores Hygon. Agregue mitigación para la vulnerabilidad de desbordamiento de pila de retorno especulativo que también existe en los procesadores Hygon. A vulnerability was found in the Linux kernel, where the Hygon x86 processor is susceptible to a speculative return stack overflow. • https://git.kernel.org/stable/c/e7ea043bc3f19473561c08565047b3f1671bf35d https://git.kernel.org/stable/c/f090a8b4d2e3ec6f318d6fdab243a2edc5a8cc37 https://git.kernel.org/stable/c/6ce2f297a7168274547d0b5aea6c7c16268b8a96 https://git.kernel.org/stable/c/cf43b304b6952b549d58feabc342807b334f03d4 https://git.kernel.org/stable/c/a5ef7d68cea1344cf524f04981c2b3f80bedbb0d https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html https://access.redhat.com/security/cve/CVE-2023-52482 https://bugzilla.redhat.com/show_bug.cgi?id=2267028 • CWE-562: Return of Stack Variable Address •
CVSS: 4.7EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52481 – arm64: errata: Add Cortex-A520 speculative unprivileged load workaround
https://notcve.org/view.php?id=CVE-2023-52481
In the Linux kernel, the following vulnerability has been resolved: arm64: errata: Add Cortex-A520 speculative unprivileged load workaround Implement the workaround for ARM Cortex-A520 erratum 2966298. On an affected Cortex-A520 core, a speculatively executed unprivileged load might leak data from a privileged load via a cache side channel. The issue only exists for loads within a translation regime with the same translation (e.g. same ASID and VMID). Therefore, the issue only affects the return to EL0. The workaround is to execute a TLBI before returning to EL0 after all loads of privileged data. A non-shareable TLBI to any address is sufficient. The workaround isn't necessary if page table isolation (KPTI) is enabled, but for simplicity it will be. • https://git.kernel.org/stable/c/6e3ae2927b432a3b7c8374f14dbc1bd9ebe4372c https://git.kernel.org/stable/c/32b0a4ffcaea44a00a61e40c0d1bcc50362aee25 https://git.kernel.org/stable/c/471470bc7052d28ce125901877dd10e4c048e513 •