CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47439 – net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work
https://notcve.org/view.php?id=CVE-2021-47439
In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the ksz module is installed and removed using rmmod, kernel crashes with null pointer dereferrence error. During rmmod, ksz_switch_remove function tries to cancel the mib_read_workqueue using cancel_delayed_work_sync routine and unregister switch from dsa. During dsa_unregister_switch it calls ksz_mac_link_down, which in turn reschedules the workqueue since mib_interval is non-zero. Due to which queue executed after mib_interval and it tries to access dp->slave. But the slave is unregistered in the ksz_switch_remove function. Hence kernel crashes. To avoid this crash, before canceling the workqueue, resetted the mib_interval to 0. v1 -> v2: -Removed the if condition in ksz_mib_read_work En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net: dsa: microchip: se agregó la condición para programar ksz_mib_read_work Cuando el módulo ksz se instala y elimina usando rmmod, el kernel falla con un error de desreferencia de puntero nulo. Durante rmmod, la función ksz_switch_remove intenta cancelar mib_read_workqueue usando la rutina cancel_delayed_work_sync y cancelar el registro del conmutador de dsa. • https://git.kernel.org/stable/c/469b390e1ba330e888175e55d78573db2e9a8cb4 https://git.kernel.org/stable/c/f2e1de075018cf71bcd7d628e9f759cb8540b0c3 https://git.kernel.org/stable/c/383239a33cf29ebee9ce0d4e0e5c900b77a16148 https://git.kernel.org/stable/c/ef1100ef20f29aec4e62abeccdb5bdbebba1e378 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47438 – net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path
https://notcve.org/view.php?id=CVE-2021-47438
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path Prior to this patch in case mlx5_core_destroy_cq() failed it returns without completing all destroy operations and that leads to memory leak. Instead, complete the destroy flow before return error. Also move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq() to be symmetrical with mlx5_core_create_cq(). kmemleak complains on: unreferenced object 0xc000000038625100 (size 64): comm "ethtool", pid 28301, jiffies 4298062946 (age 785.380s) hex dump (first 32 bytes): 60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0 `.H.......4..... 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}..... backtrace: [<000000009e8643cb>] add_res_tree+0xd0/0x270 [mlx5_core] [<00000000e7cb8e6c>] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core] [<000000002a12918f>] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core] [<00000000cef0a696>] mlx5e_create_cq+0x210/0x3f0 [mlx5_core] [<000000009c642c26>] mlx5e_open_cq+0xb4/0x130 [mlx5_core] [<0000000058dfa578>] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core] [<0000000081839561>] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core] [<0000000009cf05d4>] mlx5e_switch_priv_channels+0xa4/0x230 [mlx5_core] [<0000000042bbedd8>] mlx5e_safe_switch_params+0x14c/0x300 [mlx5_core] [<0000000004bc9db8>] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core] [<00000000a0553443>] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core] [<00000000a8f3d84b>] ethnl_set_privflags+0x234/0x2d0 [<00000000fd27f27c>] genl_family_rcv_msg_doit+0x108/0x1d0 [<00000000f495e2bb>] genl_family_rcv_msg+0xe4/0x1f0 [<00000000646c5c2c>] genl_rcv_msg+0x78/0x120 [<00000000d53e384e>] netlink_rcv_skb+0x74/0x1a0 En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net/mlx5e: corrige la pérdida de memoria en la ruta de error mlx5_core_destroy_cq(). Antes de este parche, en caso de que mlx5_core_destroy_cq() fallara, regresa sin completar todas las operaciones de destrucción y eso conduce a una pérdida de memoria. En su lugar, complete el flujo de destrucción antes de que se produzca el error de devolución. También mueva mlx5_debug_cq_remove() al principio de mlx5_core_destroy_cq() para que sea simétrico con mlx5_core_create_cq(). kmemleak se queja de: objeto sin referencia 0xc000000038625100 (tamaño 64): comm "ethtool", pid 28301, jiffies 4298062946 (edad 785.380 s) volcado hexadecimal (primeros 32 bytes): 60 01 48 94 00 00 00 c0 b8 05 34 3 00 00 00 c0 `.H.......4..... 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}..... rastreo hacia atrás : [<000000009e8643cb>] add_res_tree+0xd0/0x270 [mlx5_core] [<00000000e7cb8e6c>] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core] [<000000002a12918f>] 0x1d0/0x2d0 [mlx5_core] [<00000000cef0a696>] mlx5e_create_cq+0x210/0x3f0 [mlx5_core] [<000000009c642c26>] mlx5e_open_cq+0xb4/0x130 [mlx5_core] [<0000000058dfa578>] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core] [<0000000081839561>] 5e_open_channels+0x9cc/0x13e0 [mlx5_core] [<0000000009cf05d4>] mlx5e_switch_priv_channels+0xa4 /0x230 [mlx5_core] [<0000000042bbedd8>] mlx5e_safe_switch_params+0x14c/0x300 [mlx5_core] [<0000000004bc9db8>] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core [<00000000a] 0553443>] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core] [<00000000a8f3d84b>] etnl_set_privflags +0x234/0x2d0 [<00000000fd27f27c>] genl_family_rcv_msg_doit+0x108/0x1d0 [<00000000f495e2bb>] genl_family_rcv_msg+0xe4/0x1f0 [<00000000646c5c2c>] v_msg+0x78/0x120 [<00000000d53e384e>] netlink_rcv_skb+0x74/0x1a0 • https://git.kernel.org/stable/c/e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94 https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7 https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2021-47437 – iio: adis16475: fix deadlock on frequency set
https://notcve.org/view.php?id=CVE-2021-47437
In the Linux kernel, the following vulnerability has been resolved: iio: adis16475: fix deadlock on frequency set With commit 39c024b51b560 ("iio: adis16475: improve sync scale mode handling"), two deadlocks were introduced: 1) The call to 'adis_write_reg_16()' was not changed to it's unlocked version. 2) The lock was not being released on the success path of the function. This change fixes both these issues. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: adis16475: corrige el punto muerto en el conjunto de frecuencias Con el commit 39c024b51b560 ("iio: adis16475: mejora el manejo del modo de escala de sincronización"), se introdujeron dos puntos muertos: 1) La llamada a 'adis_write_reg_16 ()' no se cambió a su versión desbloqueada. 2) El bloqueo no se estaba liberando en la ruta exitosa de la función. Este cambio soluciona ambos problemas. • https://git.kernel.org/stable/c/39c024b51b5607e9d2fc6c04c2573e4a778c728d https://git.kernel.org/stable/c/04e03b907022ebd876f422f17efcc2c6cc934dc6 https://git.kernel.org/stable/c/9da1b86865ab4376408c58cd9fec332c8bdb5c73 •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2021-47435 – dm: fix mempool NULL pointer race when completing IO
https://notcve.org/view.php?id=CVE-2021-47435
In the Linux kernel, the following vulnerability has been resolved: dm: fix mempool NULL pointer race when completing IO dm_io_dec_pending() calls end_io_acct() first and will then dec md in-flight pending count. But if a task is swapping DM table at same time this can result in a crash due to mempool->elements being NULL: task1 task2 do_resume ->do_suspend ->dm_wait_for_completion bio_endio ->clone_endio ->dm_io_dec_pending ->end_io_acct ->wakeup task1 ->dm_swap_table ->__bind ->__bind_mempools ->bioset_exit ->mempool_exit ->free_io [ 67.330330] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 ...... [ 67.330494] pstate: 80400085 (Nzcv daIf +PAN -UAO) [ 67.330510] pc : mempool_free+0x70/0xa0 [ 67.330515] lr : mempool_free+0x4c/0xa0 [ 67.330520] sp : ffffff8008013b20 [ 67.330524] x29: ffffff8008013b20 x28: 0000000000000004 [ 67.330530] x27: ffffffa8c2ff40a0 x26: 00000000ffff1cc8 [ 67.330535] x25: 0000000000000000 x24: ffffffdada34c800 [ 67.330541] x23: 0000000000000000 x22: ffffffdada34c800 [ 67.330547] x21: 00000000ffff1cc8 x20: ffffffd9a1304d80 [ 67.330552] x19: ffffffdada34c970 x18: 000000b312625d9c [ 67.330558] x17: 00000000002dcfbf x16: 00000000000006dd [ 67.330563] x15: 000000000093b41e x14: 0000000000000010 [ 67.330569] x13: 0000000000007f7a x12: 0000000034155555 [ 67.330574] x11: 0000000000000001 x10: 0000000000000001 [ 67.330579] x9 : 0000000000000000 x8 : 0000000000000000 [ 67.330585] x7 : 0000000000000000 x6 : ffffff80148b5c1a [ 67.330590] x5 : ffffff8008013ae0 x4 : 0000000000000001 [ 67.330596] x3 : ffffff80080139c8 x2 : ffffff801083bab8 [ 67.330601] x1 : 0000000000000000 x0 : ffffffdada34c970 [ 67.330609] Call trace: [ 67.330616] mempool_free+0x70/0xa0 [ 67.330627] bio_put+0xf8/0x110 [ 67.330638] dec_pending+0x13c/0x230 [ 67.330644] clone_endio+0x90/0x180 [ 67.330649] bio_endio+0x198/0x1b8 [ 67.330655] dec_pending+0x190/0x230 [ 67.330660] clone_endio+0x90/0x180 [ 67.330665] bio_endio+0x198/0x1b8 [ 67.330673] blk_update_request+0x214/0x428 [ 67.330683] scsi_end_request+0x2c/0x300 [ 67.330688] scsi_io_completion+0xa0/0x710 [ 67.330695] scsi_finish_command+0xd8/0x110 [ 67.330700] scsi_softirq_done+0x114/0x148 [ 67.330708] blk_done_softirq+0x74/0xd0 [ 67.330716] __do_softirq+0x18c/0x374 [ 67.330724] irq_exit+0xb4/0xb8 [ 67.330732] __handle_domain_irq+0x84/0xc0 [ 67.330737] gic_handle_irq+0x148/0x1b0 [ 67.330744] el1_irq+0xe8/0x190 [ 67.330753] lpm_cpuidle_enter+0x4f8/0x538 [ 67.330759] cpuidle_enter_state+0x1fc/0x398 [ 67.330764] cpuidle_enter+0x18/0x20 [ 67.330772] do_idle+0x1b4/0x290 [ 67.330778] cpu_startup_entry+0x20/0x28 [ 67.330786] secondary_start_kernel+0x160/0x170 Fix this by: 1) Establishing pointers to 'struct dm_io' members in dm_io_dec_pending() so that they may be passed into end_io_acct() _after_ free_io() is called. 2) Moving end_io_acct() after free_io(). En el kernel de Linux, se resolvió la siguiente vulnerabilidad: dm: corrige la ejecución del puntero NULL de mempool al completar IO dm_io_dec_pending() llama a end_io_acct() primero y luego dec md en vuelo conteo pendiente. Pero si una tarea intercambia la tabla DM al mismo tiempo, esto puede provocar un bloqueo debido a que mempool->elementos son NULL: tarea1 tarea2 do_resume ->do_suspend ->dm_wait_for_completion bio_endio ->clone_endio ->dm_io_dec_pending ->end_io_acct ->wakeup task1 - >dm_swap_table ->__bind ->__bind_mempools ->bioset_exit ->mempool_exit ->free_io [67.330330] No se puede manejar la desreferencia del puntero NULL del kernel en la dirección virtual 00000000000000000 ...... [67.330494] pstate: 80400085 (Nzcv daIf +PAN -UAO ) [67.330510] pc: mempool_free+0x70/0xa0 [67.330515] lr: mempool_free+0x4c/0xa0 [67.330520] sp: ffffff8008013b20 [67.330524] x29: ffffff8008013b20 x28: 000000000000004 [ 67.330530] x27: fffffa8c2ff40a0 x26: 00000000ffff1cc8 [ 67.330535] x25: 0000000000000000 x24: ffffffdada34c800 [ 67.330541] x23: 0000000000000000 x22: ffffffdada34c800 [ 67.330547] x21: 00000000ffff1cc8 x20: 1304d80 [ 67.330552] x19: ffffffdada34c970 x18: 000000b312625d9c [ 67.330558] x17: 00000000002dcfbf x16: 00000000000006dd [ 67.330563] 000000000093b41e x14: 0000000000000010 [ 67.330569] x13: 0000000000007f7a x12: 0000000034155555 [ 67.330574] x11: 00000000000000001 x10: 0000000000000001 [ 67.330579] x9 : 0000000000000000 x8: 0000000000000000 [67.330585] x7: 0000000000000000 x6: ffffff80148b5c1a [67.330590] x5: ffffff8008013ae0 x4: 000000001 [67.330596] x3: ffffff80080139c8 x2: ffffff801083bab8 [67.330601] x1: 0000000000000000 x0: ffffffdada34c970 [67.330609] Rastreo de llamadas: [67.330616] mempool_free+0x70/0xa0 [67.330627] 8/0x110 [67.330638] dec_pending+0x13c/0x230 [67.330644] clone_endio+0x90/0x180 [ 67.330649] bio_endio+0x198/0x1b8 [ 67.330655] dec_pending+0x190/0x230 [ 67.330660] clone_endio+0x90/0x180 [ 67.330665] bio_endio+0x198/0x1b8 [ 67.330673 ] blk_update_request+0x214/0x428 [ 67.330683] scsi_end_request+0x2c/0x300 [ 67.330688 ] scsi_io_completion+0xa0/0x710 [ 67.330695] scsi_finish_command+0xd8/0x110 [ 67.330700] scsi_softirq_done+0x114/0x148 [ 67.330708] blk_done_softirq+0x74/0xd0 [ 67.3307 16] __do_softirq+0x18c/0x374 [ 67.330724] irq_exit+0xb4/0xb8 [ 67.330732] __handle_domain_irq +0x84/0xc0 [ 67.330737] gic_handle_irq+0x148/0x1b0 [ 67.330744] el1_irq+0xe8/0x190 [ 67.330753] lpm_cpuidle_enter+0x4f8/0x538 [ 67.330759] +0x1fc/0x398 [ 67.330764] cpuidle_enter+0x18/0x20 [ 67.330772] do_idle+0x1b4 /0x290 [ 67.330778] cpu_startup_entry+0x20/0x28 [ 67.330786] second_start_kernel+0x160/0x170 Solucione este problema de la siguiente manera: 1) Estableciendo punteros a los miembros 'struct dm_io' en dm_io_dec_pending() para que puedan pasarse a end_io_acct() _después_ free_io() se llama. 2) Mover end_io_acct() después de free_io(). • https://git.kernel.org/stable/c/9fb7cd5c7fef0f1c982e3cd27745a0dec260eaed https://git.kernel.org/stable/c/d35aef9c60d310eff3eaddacce301efe877e2b7c https://git.kernel.org/stable/c/9e07272cca2ed76f7f6073f4444b1143828c8d87 https://git.kernel.org/stable/c/ad1393b92e5059218d055bfec8f4946d85ad04c4 https://git.kernel.org/stable/c/d29c78d3f9c5d2604548c1065bf1ec212728ea61 https://git.kernel.org/stable/c/6e506f07c5b561d673dd0b0d8f7f420cc48024fb https://git.kernel.org/stable/c/d208b89401e073de986dc891037c5a668f5d5d95 https://access.redhat.com/security/cve/CVE-2021-47435 • CWE-476: NULL Pointer Dereference •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2021-47434 – xhci: Fix command ring pointer corruption while aborting a command
https://notcve.org/view.php?id=CVE-2021-47434
In the Linux kernel, the following vulnerability has been resolved: xhci: Fix command ring pointer corruption while aborting a command The command ring pointer is located at [6:63] bits of the command ring control register (CRCR). All the control bits like command stop, abort are located at [0:3] bits. While aborting a command, we read the CRCR and set the abort bit and write to the CRCR. The read will always give command ring pointer as all zeros. So we essentially write only the control bits. • https://git.kernel.org/stable/c/22bcb65ea41072ab5d03c0c6290e04e0df6d09a0 https://git.kernel.org/stable/c/62c182b5e763e5f4062e72678e72ce3e02dd4d1b https://git.kernel.org/stable/c/01c2dcb67e71c351006dd17cbba86c26b7f61eaf https://git.kernel.org/stable/c/dec944bb7079b37968cf69c8a438f91f15c4cc61 https://git.kernel.org/stable/c/e54abefe703ab7c4e5983e889babd1447738ca42 https://git.kernel.org/stable/c/ff0e50d3564f33b7f4b35cadeabd951d66cfc570 •