CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47272 – usb: dwc3: gadget: Bail from dwc3_gadget_exit() if dwc->gadget is NULL
https://notcve.org/view.php?id=CVE-2021-47272
In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: gadget: Bail from dwc3_gadget_exit() if dwc->gadget is NULL There exists a possible scenario in which dwc3_gadget_init() can fail: during during host -> peripheral mode switch in dwc3_set_mode(), and a pending gadget driver fails to bind. Then, if the DRD undergoes another mode switch from peripheral->host the resulting dwc3_gadget_exit() will attempt to reference an invalid and dangling dwc->gadget pointer as well as call dma_free_coherent() on unmapped DMA pointers. The exact scenario can be reproduced as follows: - Start DWC3 in peripheral mode - Configure ConfigFS gadget with FunctionFS instance (or use g_ffs) - Run FunctionFS userspace application (open EPs, write descriptors, etc) - Bind gadget driver to DWC3's UDC - Switch DWC3 to host mode => dwc3_gadget_exit() is called. usb_del_gadget() will put the ConfigFS driver instance on the gadget_driver_pending_list - Stop FunctionFS application (closes the ep files) - Switch DWC3 to peripheral mode => dwc3_gadget_init() fails as usb_add_gadget() calls check_pending_gadget_drivers() and attempts to rebind the UDC to the ConfigFS gadget but fails with -19 (-ENODEV) because the FFS instance is not in FFS_ACTIVE state (userspace has not re-opened and written the descriptors yet, i.e. desc_ready!=0). - Switch DWC3 back to host mode => dwc3_gadget_exit() is called again, but this time dwc->gadget is invalid. Although it can be argued that userspace should take responsibility for ensuring that the FunctionFS application be ready prior to allowing the composite driver bind to the UDC, failure to do so should not result in a panic from the kernel driver. Fix this by setting dwc->gadget to NULL in the failure path of dwc3_gadget_init() and add a check to dwc3_gadget_exit() to bail out unless the gadget pointer is valid. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: dwc3: gadget: Bail from dwc3_gadget_exit() si dwc->gadget es NULL. Existe un posible escenario en el que dwc3_gadget_init() puede fallar: durante durante el host -> modo periférico Cambie a dwc3_set_mode() y un controlador de dispositivo pendiente no se vincula. • https://git.kernel.org/stable/c/e81a7018d93a7de31a3f121c9a7eecd0a5ec58b0 https://git.kernel.org/stable/c/851dee5a5da56564a70290713aee665403bb0b24 https://git.kernel.org/stable/c/4aad390363d2b9b3e92428dd34d27bb7ea8f1ee8 https://git.kernel.org/stable/c/03715ea2e3dbbc56947137ce3b4ac18a726b2f87 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2021-47270 – usb: fix various gadgets null ptr deref on 10gbps cabling.
https://notcve.org/view.php?id=CVE-2021-47270
In the Linux kernel, the following vulnerability has been resolved: usb: fix various gadgets null ptr deref on 10gbps cabling. This avoids a null pointer dereference in f_{ecm,eem,hid,loopback,printer,rndis,serial,sourcesink,subset,tcm} by simply reusing the 5gbps config for 10gbps. En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: usb: repara varios gadgets null ptr deref en cableado de 10gbps. Esto evita una desreferencia de puntero null en f_{ecm,eem,hid,loopback,printer,rndis,serial,sourcesink,subset,tcm} simplemente reutilizando la configuración de 5 gbps para 10 gbps. • https://git.kernel.org/stable/c/eaef50c760576bca70b87fdc26eb87a3660529f8 https://git.kernel.org/stable/c/beb1e67a5ca8d69703c776db9000527f44c0c93c https://git.kernel.org/stable/c/8cd5f45c1b769e3e9e0f4325dd08b6c3749dc7ee https://git.kernel.org/stable/c/10770d2ac0094b053c8897d96d7b2737cd72f7c5 https://git.kernel.org/stable/c/b4903f7fdc484628d0b8022daf86e2439d3ab4db https://git.kernel.org/stable/c/4b289a0f3033f465b4fd51ba995251a7867a2aa2 https://git.kernel.org/stable/c/f17aae7c4009160f0630a91842a281773976a5bc https://git.kernel.org/stable/c/90c4d05780d47e14a50e11a7f17373104 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47269 – usb: dwc3: ep0: fix NULL pointer exception
https://notcve.org/view.php?id=CVE-2021-47269
In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: ep0: fix NULL pointer exception There is no validation of the index from dwc3_wIndex_to_dep() and we might be referring a non-existing ep and trigger a NULL pointer exception. In certain configurations we might use fewer eps and the index might wrongly indicate a larger ep index than existing. By adding this validation from the patch we can actually report a wrong index back to the caller. In our usecase we are using a composite device on an older kernel, but upstream might use this fix also. Unfortunately, I cannot describe the hardware for others to reproduce the issue as it is a proprietary implementation. [ 82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4 [ 82.966891] Mem abort info: [ 82.969663] ESR = 0x96000006 [ 82.972703] Exception class = DABT (current EL), IL = 32 bits [ 82.978603] SET = 0, FnV = 0 [ 82.981642] EA = 0, S1PTW = 0 [ 82.984765] Data abort info: [ 82.987631] ISV = 0, ISS = 0x00000006 [ 82.991449] CM = 0, WnR = 0 [ 82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc [ 83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000 [ 83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP [ 83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c) [ 83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1 [ 83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO) [ 83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c [ 83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94 ... [ 83.141788] Call trace: [ 83.144227] dwc3_ep0_handle_feature+0x414/0x43c [ 83.148823] dwc3_ep0_interrupt+0x3b4/0xc94 [ 83.181546] ---[ end trace aac6b5267d84c32f ]--- En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: dwc3: ep0: corrige excepción de puntero NULL. No hay validación del índice desde dwc3_wIndex_to_dep() y podríamos estar haciendo referencia a un ep inexistente y desencadenar una excepción de puntero NULL. En ciertas configuraciones, podríamos usar menos eps y el índice podría indicar erróneamente un índice ep mayor que el existente. • https://git.kernel.org/stable/c/96b74a99d360235c24052f1d060e64ac53f43528 https://git.kernel.org/stable/c/60156089f07e724e4dc8483702d5e1ede4522749 https://git.kernel.org/stable/c/990dc90750772622d44ca2ea6652c521e6f67e16 https://git.kernel.org/stable/c/bd551e7c85939de2182010273450bfa78c3742fc https://git.kernel.org/stable/c/366369b89bedd59b1425386e8d4a18a466e420e4 https://git.kernel.org/stable/c/470403639114895e2697c766fbe17be8d0e9b67a https://git.kernel.org/stable/c/788755756dd4a6aba1de479fec20b0fa600e7f19 https://git.kernel.org/stable/c/d00889080ab60051627dab1d85831cd9d •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47268 – usb: typec: tcpm: cancel vdm and state machine hrtimer when unregister tcpm port
https://notcve.org/view.php?id=CVE-2021-47268
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: cancel vdm and state machine hrtimer when unregister tcpm port A pending hrtimer may expire after the kthread_worker of tcpm port is destroyed, see below kernel dump when do module unload, fix it by cancel the 2 hrtimers. [ 111.517018] Unable to handle kernel paging request at virtual address ffff8000118cb880 [ 111.518786] blk_update_request: I/O error, dev sda, sector 60061185 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 111.526594] Mem abort info: [ 111.526597] ESR = 0x96000047 [ 111.526600] EC = 0x25: DABT (current EL), IL = 32 bits [ 111.526604] SET = 0, FnV = 0 [ 111.526607] EA = 0, S1PTW = 0 [ 111.526610] Data abort info: [ 111.526612] ISV = 0, ISS = 0x00000047 [ 111.526615] CM = 0, WnR = 1 [ 111.526619] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000041d75000 [ 111.526623] [ffff8000118cb880] pgd=10000001bffff003, p4d=10000001bffff003, pud=10000001bfffe003, pmd=10000001bfffa003, pte=0000000000000000 [ 111.526642] Internal error: Oops: 96000047 [#1] PREEMPT SMP [ 111.526647] Modules linked in: dwc3_imx8mp dwc3 phy_fsl_imx8mq_usb [last unloaded: tcpci] [ 111.526663] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc4-00927-gebbe9dbd802c-dirty #36 [ 111.526670] Hardware name: NXP i.MX8MPlus EVK board (DT) [ 111.526674] pstate: 800000c5 (Nzcv daIF -PAN -UAO -TCO BTYPE=--) [ 111.526681] pc : queued_spin_lock_slowpath+0x1a0/0x390 [ 111.526695] lr : _raw_spin_lock_irqsave+0x88/0xb4 [ 111.526703] sp : ffff800010003e20 [ 111.526706] x29: ffff800010003e20 x28: ffff00017f380180 [ 111.537156] buffer_io_error: 6 callbacks suppressed [ 111.537162] Buffer I/O error on dev sda1, logical block 60040704, async page read [ 111.539932] x27: ffff00017f3801c0 [ 111.539938] x26: ffff800010ba2490 x25: 0000000000000000 x24: 0000000000000001 [ 111.543025] blk_update_request: I/O error, dev sda, sector 60061186 op 0x0:(READ) flags 0x0 phys_seg 7 prio class 0 [ 111.548304] [ 111.548306] x23: 00000000000000c0 x22: ffff0000c2a9f184 x21: ffff00017f380180 [ 111.551374] Buffer I/O error on dev sda1, logical block 60040705, async page read [ 111.554499] [ 111.554503] x20: ffff0000c5f14210 x19: 00000000000000c0 x18: 0000000000000000 [ 111.557391] Buffer I/O error on dev sda1, logical block 60040706, async page read [ 111.561218] [ 111.561222] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 [ 111.564205] Buffer I/O error on dev sda1, logical block 60040707, async page read [ 111.570887] x14: 00000000000000f5 x13: 0000000000000001 x12: 0000000000000040 [ 111.570902] x11: ffff0000c05ac6d8 [ 111.583420] Buffer I/O error on dev sda1, logical block 60040708, async page read [ 111.588978] x10: 0000000000000000 x9 : 0000000000040000 [ 111.588988] x8 : 0000000000000000 [ 111.597173] Buffer I/O error on dev sda1, logical block 60040709, async page read [ 111.605766] x7 : ffff00017f384880 x6 : ffff8000118cb880 [ 111.605777] x5 : ffff00017f384880 [ 111.611094] Buffer I/O error on dev sda1, logical block 60040710, async page read [ 111.617086] x4 : 0000000000000000 x3 : ffff0000c2a9f184 [ 111.617096] x2 : ffff8000118cb880 [ 111.622242] Buffer I/O error on dev sda1, logical block 60040711, async page read [ 111.626927] x1 : ffff8000118cb880 x0 : ffff00017f384888 [ 111.626938] Call trace: [ 111.626942] queued_spin_lock_slowpath+0x1a0/0x390 [ 111.795809] kthread_queue_work+0x30/0xc0 [ 111.799828] state_machine_timer_handler+0x20/0x30 [ 111.804624] __hrtimer_run_queues+0x140/0x1e0 [ 111.808990] hrtimer_interrupt+0xec/0x2c0 [ 111.813004] arch_timer_handler_phys+0x38/0x50 [ 111.817456] handle_percpu_devid_irq+0x88/0x150 [ 111.821991] __handle_domain_irq+0x80/0xe0 [ 111.826093] gic_handle_irq+0xc0/0x140 [ 111.829848] el1_irq+0xbc/0x154 [ 111.832991] arch_cpu_idle+0x1c/0x2c [ 111.836572] default_idle_call+0x24/0x6c [ 111.840497] do_idle+0x238/0x2ac [ 1 ---truncated--- En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: typec: tcpm: cancela vdm y state machine hrtimer cuando se cancela el registro del puerto tcpm. Un hrtimer pendiente puede caducar después de que se destruya el kthread_worker del puerto tcpm; consulte el siguiente volcado del kernel cuando se descarga el módulo , solucionelo cancelando los 2 temporizadores. [ 111.517018] No se puede manejar la solicitud de paginación del kernel en la dirección virtual ffff8000118cb880 [ 111.518786] blk_update_request: error de E/S, dev sda, sector 60061185 op 0x0:(LEER) indicadores 0x0 phys_seg 1 prio clase 0 [ 111.526594] Información de cancelación de memoria: [111.526597 ] ESR = 0x96000047 [ 111.526600] EC = 0x25: DABT (EL actual), IL = 32 bits [ 111.526604] SET = 0, FnV = 0 [ 111.526607] EA = 0, S1PTW = 0 [ 111.526610] Información de cancelación de datos: [ 111. 526612 ] ISV = 0, ISS = 0x00000047 [ 111.526615] CM = 0, WnR = 1 [ 111.526619] tabla de intercambio: páginas de 4k, VA de 48 bits, pgdp=0000000041d75000 [ 111.526623 [ffff8000118cb] 880] pgd=10000001bffff003, p4d=10000001bffff003, pudín =10000001bfffe003, pmd=10000001bfffa003, pte=0000000000000000 [111.526642] Error interno: Ups: 96000047 [#1] SMP PREEMPLEO [111.526647] Módulos vinculados en: dwc3_imx8mp dwc3 phy_fsl_imx8mq_usb [última descarga: tcpci] [111.526663] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc4-00927-gebbe9dbd802c-dirty #36 [111.526670] Nombre del hardware: placa NXP i.MX8MPlus EVK (DT) [111.526674] pstate: 800000c5 (Nzcv daIF -PAN -UAO -TCO BTYPE=--) [ 111.526681] pc : queued_spin_lock_slowpath+0x1a0/0x390 [ 111.526695] lr : _raw_spin_lock_irqsave+0x88/0xb4 [ 111.526703] sp : ffff800010003e20 [ 111.526 706] x29: ffff800010003e20 x28: ffff00017f380180 [111.537156] buffer_io_error: 6 devoluciones de llamada suprimidas [111.537162 ] Error de E/S del búfer en dev sda1, bloque lógico 60040704, lectura de página asíncrona [111.539932] x27: ffff00017f3801c0 [111.539938] x26: ffff800010ba2490 x25: 0000000000000000 x24: 00000000000001 [111.543025] blk_update_request: error de E/S, dev sda, sector 60061186 op 0x0:(LEER) banderas 0x0 phys_seg 7 prio clase 0 [ 111.548304] [ 111.548306] x23: 00000000000000c0 x22: ffff0000c2a9f184 x21: ffff00017f380180 [ 111.551 374] Error de E/S del búfer en dev sda1, bloque lógico 60040705, lectura de página asíncrona [111.554499] [111.554503] x20: ffff0000c5f14210 x19: 00000000000000c0 x18: 0000000000000000 [111.557391] Error de E/S del búfer en dev sda1, bloque lógico 60040706, lectura de página asíncrona [111. 561218] [ 111.561222] x17: 0000000000000000 x16: 0000000000000000 x15: 00000000000000000 [ 111.564205] Búfer Error de E/S en dev sda1, bloque lógico 60040707, lectura de página asíncrona [111.570887] x14: 00000000000000f5 x13: 00000000000000001 x12: 0000000000000040 [111.570902] x11: ff0000c05ac6d8 [111.583420] Error de E/S del búfer en dev sda1, bloque lógico 60040708, asíncrono lectura de página [111.588978] x10: 0000000000000000 x9: 0000000000040000 [111.588988] x8: 0000000000000000 [111.597173] Error de E/S del búfer en dev sda1, bloque lógico 6004 0709, lectura de página asíncrona [111.605766] x7: ffff00017f384880 x6: ffff8000118cb880 [111.605777] x5: ffff00017f384880 [111.611094] Error de E/S del búfer en dev sda1, bloque lógico 60040710, lectura de página asíncrona [111.617086] x4: 0000000000000000 x3: ffff0000c2a9f184 [111.617096] 2: ffff8000118cb880 [111.622242] Error de E/S del búfer en dev sda1, bloque lógico 60040711 , lectura de página asíncrona [111.626927] x1: ffff8000118cb880 x0: ffff00017f384888 [111.626938] Seguimiento de llamadas: [111.626942] queued_spin_lock_slowpath+0x1a0/0x390 [111.795809] _queue_work+0x30/0xc0 [ 111.799828] state_machine_timer_handler+0x20/0x30 [ 111.804624] __hrtimer_run_queues+0x140/ 0x1e0 [ 111.808990] hrtimer_interrupt+0xec/0x2c0 [ 111.813004] arch_timer_handler_phys+0x38/0x50 [ 111.817456] handle_percpu_devid_irq+0x88/0x150 [ 111.821991] main_irq+0x80/0xe0 [ 111.826093] gic_handle_irq+0x ---truncado--- • https://git.kernel.org/stable/c/3ed8e1c2ac9914a2fcb08ec13476b85319536cea https://git.kernel.org/stable/c/18eaf0de50eadeeb395b83310b259b21ad8ed0a6 https://git.kernel.org/stable/c/d0a06696a8a4d99f649240b6f9b8a2e55452ecf5 https://git.kernel.org/stable/c/3a13ff7ef4349d70d1d18378d661117dd5af8efe •
CVSS: 6.3EPSS: 0%CPEs: 7EXPL: 0CVE-2021-47267 – usb: fix various gadget panics on 10gbps cabling
https://notcve.org/view.php?id=CVE-2021-47267
In the Linux kernel, the following vulnerability has been resolved: usb: fix various gadget panics on 10gbps cabling usb_assign_descriptors() is called with 5 parameters, the last 4 of which are the usb_descriptor_header for: full-speed (USB1.1 - 12Mbps [including USB1.0 low-speed @ 1.5Mbps), high-speed (USB2.0 - 480Mbps), super-speed (USB3.0 - 5Gbps), super-speed-plus (USB3.1 - 10Gbps). The differences between full/high/super-speed descriptors are usually substantial (due to changes in the maximum usb block size from 64 to 512 to 1024 bytes and other differences in the specs), while the difference between 5 and 10Gbps descriptors may be as little as nothing (in many cases the same tuning is simply good enough). However if a gadget driver calls usb_assign_descriptors() with a NULL descriptor for super-speed-plus and is then used on a max 10gbps configuration, the kernel will crash with a null pointer dereference, when a 10gbps capable device port + cable + host port combination shows up. (This wouldn't happen if the gadget max-speed was set to 5gbps, but it of course defaults to the maximum, and there's no real reason to artificially limit it) The fix is to simply use the 5gbps descriptor as the 10gbps descriptor, if a 10gbps descriptor wasn't provided. Obviously this won't fix the problem if the 5gbps descriptor is also NULL, but such cases can't be so trivially solved (and any such gadgets are unlikely to be used with USB3 ports any way). En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: corrige varios fallos de dispositivos en cableado de 10 gbps usb_assign_descriptors() se llama con 5 parámetros, los últimos 4 de los cuales son usb_descriptor_header para: velocidad completa (USB1.1 - 12Mbps [ incluyendo USB1.0 de baja velocidad a 1,5 Mbps), alta velocidad (USB2.0 - 480 Mbps), súper velocidad (USB3.0 - 5 Gbps), súper velocidad plus (USB3.1 - 10 Gbps). Las diferencias entre los descriptores de velocidad completa/alta/supervelocidad suelen ser sustanciales (debido a cambios en el tamaño máximo del bloque USB de 64 a 512 a 1024 bytes y otras diferencias en las especificaciones), mientras que la diferencia entre los descriptores de 5 y 10 Gbps puede ser tan casi nada (en muchos casos, la misma afinación es simplemente suficiente). Sin embargo, si un controlador de dispositivo llama a usb_assign_descriptors() con un descriptor NULL para super-speed-plus y luego se usa en una configuración máxima de 10 gbps, el kernel fallará con una desreferencia de puntero null, cuando un puerto de dispositivo con capacidad de 10 gbps + cable + puerto de host Aparece la combinación. (Esto no sucedería si la velocidad máxima del dispositivo estuviera configurada en 5 gbps, pero, por supuesto, está predeterminada al máximo y no hay ninguna razón real para limitarla artificialmente). • https://git.kernel.org/stable/c/fd24be23abf3e94260be0f00bb42c7e91d495f87 https://git.kernel.org/stable/c/70cd19cb5bd94bbb5bacfc9c1e4ee0071699a604 https://git.kernel.org/stable/c/45f9a2fe737dc0a5df270787f2231aee8985cd59 https://git.kernel.org/stable/c/5ef23506695b01d5d56a13a092a97f2478069d75 https://git.kernel.org/stable/c/b972eff874637402ddc4a7dd11fb22538a0b6d28 https://git.kernel.org/stable/c/ca6bc277430d90375452b60b047763a090b7673e https://git.kernel.org/stable/c/032e288097a553db5653af552dd8035cd2a0ba96 •