CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2023-52488 – serial: sc16is7xx: convert from _raw_ to _noinc_ regmap functions for FIFO
https://notcve.org/view.php?id=CVE-2023-52488
In the Linux kernel, the following vulnerability has been resolved: serial: sc16is7xx: convert from _raw_ to _noinc_ regmap functions for FIFO The SC16IS7XX IC supports a burst mode to access the FIFOs where the initial register address is sent ($00), followed by all the FIFO data without having to resend the register address each time. In this mode, the IC doesn't increment the register address for each R/W byte. The regmap_raw_read() and regmap_raw_write() are functions which can perform IO over multiple registers. They are currently used to read/write from/to the FIFO, and although they operate correctly in this burst mode on the SPI bus, they would corrupt the regmap cache if it was not disabled manually. The reason is that when the R/W size is more than 1 byte, these functions assume that the register address is incremented and handle the cache accordingly. Convert FIFO R/W functions to use the regmap _noinc_ versions in order to remove the manual cache control which was a workaround when using the _raw_ versions. FIFO registers are properly declared as volatile so cache will not be used/updated for FIFO accesses. • https://git.kernel.org/stable/c/dfeae619d781dee61666d5551b93ba3be755a86b https://git.kernel.org/stable/c/4e37416e4ee1b1bc17364a68973e0c63be89e611 https://git.kernel.org/stable/c/e635f652696ef6f1230621cfd89c350cb5ec6169 https://git.kernel.org/stable/c/416b10d2817c94db86829fb92ad43ce7d002c573 https://git.kernel.org/stable/c/084c24e788d9cf29c55564de368bf5284f2bb5db https://git.kernel.org/stable/c/aa7cb4787698add9367b19f7afc667662c9bdb23 https://git.kernel.org/stable/c/dbf4ab821804df071c8b566d9813083125e6d97b https://lists.debian.org/debian-lts-announce/2024/06/ •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52487 – net/mlx5e: Fix peer flow lists handling
https://notcve.org/view.php?id=CVE-2023-52487
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix peer flow lists handling The cited change refactored mlx5e_tc_del_fdb_peer_flow() to only clear DUP flag when list of peer flows has become empty. However, if any concurrent user holds a reference to a peer flow (for example, the neighbor update workqueue task is updating peer flow's parent encap entry concurrently), then the flow will not be removed from the peer list and, consecutively, DUP flag will remain set. Since mlx5e_tc_del_fdb_peers_flow() calls mlx5e_tc_del_fdb_peer_flow() for every possible peer index the algorithm will try to remove the flow from eswitch instances that it has never peered with causing either NULL pointer dereference when trying to remove the flow peer list head of peer_index that was never initialized or a warning if the list debug config is enabled[0]. Fix the issue by always removing the peer flow from the list even when not releasing the last reference to it. [0]: [ 3102.985806] ------------[ cut here ]------------ [ 3102.986223] list_del corruption, ffff888139110698->next is NULL [ 3102.986757] WARNING: CPU: 2 PID: 22109 at lib/list_debug.c:53 __list_del_entry_valid_or_report+0x4f/0xc0 [ 3102.987561] Modules linked in: act_ct nf_flow_table bonding act_tunnel_key act_mirred act_skbedit vxlan cls_matchall nfnetlink_cttimeout act_gact cls_flower sch_ingress mlx5_vdpa vringh vhost_iotlb vdpa openvswitch nsh xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat xt_addrtype xt_conntrack nf_nat br_netfilter rpcsec_gss_krb5 auth_rpcg ss oid_registry overlay rpcrdma rdma_ucm ib_iser libiscsi scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5_core [last unloaded: bonding] [ 3102.991113] CPU: 2 PID: 22109 Comm: revalidator28 Not tainted 6.6.0-rc6+ #3 [ 3102.991695] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [ 3102.992605] RIP: 0010:__list_del_entry_valid_or_report+0x4f/0xc0 [ 3102.993122] Code: 39 c2 74 56 48 8b 32 48 39 fe 75 62 48 8b 51 08 48 39 f2 75 73 b8 01 00 00 00 c3 48 89 fe 48 c7 c7 48 fd 0a 82 e8 41 0b ad ff <0f> 0b 31 c0 c3 48 89 fe 48 c7 c7 70 fd 0a 82 e8 2d 0b ad ff 0f 0b [ 3102.994615] RSP: 0018:ffff8881383e7710 EFLAGS: 00010286 [ 3102.995078] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 [ 3102.995670] RDX: 0000000000000001 RSI: ffff88885f89b640 RDI: ffff88885f89b640 [ 3102.997188] DEL flow 00000000be367878 on port 0 [ 3102.998594] RBP: dead000000000122 R08: 0000000000000000 R09: c0000000ffffdfff [ 3102.999604] R10: 0000000000000008 R11: ffff8881383e7598 R12: dead000000000100 [ 3103.000198] R13: 0000000000000002 R14: ffff888139110000 R15: ffff888101901240 [ 3103.000790] FS: 00007f424cde4700(0000) GS:ffff88885f880000(0000) knlGS:0000000000000000 [ 3103.001486] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3103.001986] CR2: 00007fd42e8dcb70 CR3: 000000011e68a003 CR4: 0000000000370ea0 [ 3103.002596] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 3103.003190] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 3103.003787] Call Trace: [ 3103.004055] <TASK> [ 3103.004297] ? __warn+0x7d/0x130 [ 3103.004623] ? __list_del_entry_valid_or_report+0x4f/0xc0 [ 3103.005094] ? • https://git.kernel.org/stable/c/9be6c21fdcf8a7ec48262bb76f78c17ac2761ac6 https://git.kernel.org/stable/c/74cec142f89bf85c6c99c5db957da9f663f9f16f https://git.kernel.org/stable/c/e24d6f5a7f2d95a98a46257a5a5a5381d572894f https://git.kernel.org/stable/c/d76fdd31f953ac5046555171620f2562715e9b71 •
CVSS: 4.4EPSS: 0%CPEs: 8EXPL: 0CVE-2023-52486 – drm: Don't unref the same fb many times by mistake due to deadlock handling
https://notcve.org/view.php?id=CVE-2023-52486
In the Linux kernel, the following vulnerability has been resolved: drm: Don't unref the same fb many times by mistake due to deadlock handling If we get a deadlock after the fb lookup in drm_mode_page_flip_ioctl() we proceed to unref the fb and then retry the whole thing from the top. But we forget to reset the fb pointer back to NULL, and so if we then get another error during the retry, before the fb lookup, we proceed the unref the same fb again without having gotten another reference. The end result is that the fb will (eventually) end up being freed while it's still in use. Reset fb to NULL once we've unreffed it to avoid doing it again until we've done another fb lookup. This turned out to be pretty easy to hit on a DG2 when doing async flips (and CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y). The first symptom I saw that drm_closefb() simply got stuck in a busy loop while walking the framebuffer list. Fortunately I was able to convince it to oops instead, and from there it was easier to track down the culprit. En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: drm: No desreferenciar el mismo fb muchas veces por error debido al manejo de interbloqueos Si obtenemos un punto muerto después de la búsqueda de fb en drm_mode_page_flip_ioctl() procedemos a desreferenciar el fb y luego Vuelva a intentarlo todo desde arriba. Pero nos olvidamos de restablecer el puntero fb a NULL, por lo que si obtenemos otro error durante el reintento, antes de la búsqueda de fb, procedemos a desref el mismo fb nuevamente sin haber obtenido otra referencia. • https://git.kernel.org/stable/c/376e21a9e4c2c63ee5d8d3aa74be5082c3882229 https://git.kernel.org/stable/c/9dd334a8245011ace45e53298175c7b659edb3e7 https://git.kernel.org/stable/c/f55261469be87c55df13db76dc945f6bcd825105 https://git.kernel.org/stable/c/b4af63da9d94986c529d74499fdfe44289acd551 https://git.kernel.org/stable/c/62f2e79cf9f4f47cc9dea9cebdf58d9f7b5695e0 https://git.kernel.org/stable/c/d7afdf360f4ac142832b098b4de974e867cc063c https://git.kernel.org/stable/c/bfd0feb1b109cb63b87fdcd00122603787c75a1a https://git.kernel.org/stable/c/cb4daf271302d71a6b9a7c01bd0b6d76f • CWE-833: Deadlock •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2023-52485 – drm/amd/display: Wake DMCUB before sending a command
https://notcve.org/view.php?id=CVE-2023-52485
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Wake DMCUB before sending a command [Why] We can hang in place trying to send commands when the DMCUB isn't powered on. [How] For functions that execute within a DC context or DC lock we can wrap the direct calls to dm_execute_dmub_cmd/list with code that exits idle power optimizations and reallows once we're done with the command submission on success. For DM direct submissions the DM will need to manage the enter/exit sequencing manually. We cannot invoke a DMCUB command directly within the DM execution helper or we can deadlock. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: activa DMCUB antes de enviar un comando [Por qué] Podemos quedarnos quietos intentando enviar comandos cuando DMCUB no está encendido. [Cómo] Para funciones que se ejecutan dentro de un contexto de DC o bloqueo de DC, podemos ajustar las llamadas directas a dm_execute_dmub_cmd/list con código que salga de las optimizaciones de energía inactivas y se vuelva a permitir una vez que hayamos terminado con el envío del comando en caso de éxito. Para envíos directos de DM, el DM deberá gestionar la secuencia de entrada/salida manualmente. No podemos invocar un comando DMCUB directamente dentro del asistente de ejecución de DM o podemos bloquearnos. • https://git.kernel.org/stable/c/303197775a97416b62d4da69280d0c120a20e009 https://git.kernel.org/stable/c/8892780834ae294bc3697c7d0e056d7743900b39 •
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 •