CVE-2021-47449
ice: fix locking for Tx timestamp tracking flush
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
ice: fix locking for Tx timestamp tracking flush
Commit 4dd0d5c33c3e ("ice: add lock around Tx timestamp tracker flush")
added a lock around the Tx timestamp tracker flow which is used to
cleanup any left over SKBs and prepare for device removal.
This lock is problematic because it is being held around a call to
ice_clear_phy_tstamp. The clear function takes a mutex to send a PHY
write command to firmware. This could lead to a deadlock if the mutex
actually sleeps, and causes the following warning on a kernel with
preemption debugging enabled:
[ 715.419426] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:573
[ 715.427900] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3100, name: rmmod
[ 715.435652] INFO: lockdep is turned off.
[ 715.439591] Preemption disabled at:
[ 715.439594] [<0000000000000000>] 0x0
[ 715.446678] CPU: 52 PID: 3100 Comm: rmmod Tainted: G W OE 5.15.0-rc4+ #42 bdd7ec3018e725f159ca0d372ce8c2c0e784891c
[ 715.458058] Hardware name: Intel Corporation S2600STQ/S2600STQ, BIOS SE5C620.86B.02.01.0010.010620200716 01/06/2020
[ 715.468483] Call Trace:
[ 715.470940] dump_stack_lvl+0x6a/0x9a
[ 715.474613] ___might_sleep.cold+0x224/0x26a
[ 715.478895] __mutex_lock+0xb3/0x1440
[ 715.482569] ? stack_depot_save+0x378/0x500
[ 715.486763] ? ice_sq_send_cmd+0x78/0x14c0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.494979] ? kfree+0xc1/0x520
[ 715.498128] ? mutex_lock_io_nested+0x12a0/0x12a0
[ 715.502837] ? kasan_set_free_info+0x20/0x30
[ 715.507110] ? __kasan_slab_free+0x10b/0x140
[ 715.511385] ? slab_free_freelist_hook+0xc7/0x220
[ 715.516092] ? kfree+0xc1/0x520
[ 715.519235] ? ice_deinit_lag+0x16c/0x220 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.527359] ? ice_remove+0x1cf/0x6a0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.535133] ? pci_device_remove+0xab/0x1d0
[ 715.539318] ? __device_release_driver+0x35b/0x690
[ 715.544110] ? driver_detach+0x214/0x2f0
[ 715.548035] ? bus_remove_driver+0x11d/0x2f0
[ 715.552309] ? pci_unregister_driver+0x26/0x250
[ 715.556840] ? ice_module_exit+0xc/0x2f [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.564799] ? __do_sys_delete_module.constprop.0+0x2d8/0x4e0
[ 715.570554] ? do_syscall_64+0x3b/0x90
[ 715.574303] ? entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 715.579529] ? start_flush_work+0x542/0x8f0
[ 715.583719] ? ice_sq_send_cmd+0x78/0x14c0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.591923] ice_sq_send_cmd+0x78/0x14c0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.599960] ? wait_for_completion_io+0x250/0x250
[ 715.604662] ? lock_acquire+0x196/0x200
[ 715.608504] ? do_raw_spin_trylock+0xa5/0x160
[ 715.612864] ice_sbq_rw_reg+0x1e6/0x2f0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.620813] ? ice_reset+0x130/0x130 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.628497] ? __debug_check_no_obj_freed+0x1e8/0x3c0
[ 715.633550] ? trace_hardirqs_on+0x1c/0x130
[ 715.637748] ice_write_phy_reg_e810+0x70/0xf0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.646220] ? do_raw_spin_trylock+0xa5/0x160
[ 715.650581] ? ice_ptp_release+0x910/0x910 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.658797] ? ice_ptp_release+0x255/0x910 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.667013] ice_clear_phy_tstamp+0x2c/0x110 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.675403] ice_ptp_release+0x408/0x910 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.683440] ice_remove+0x560/0x6a0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d]
[ 715.691037] ? _raw_spin_unlock_irqrestore+0x46/0x73
[ 715.696005] pci_device_remove+0xab/0x1d0
[ 715.700018] __device_release_driver+0x35b/0x690
[ 715.704637] driver_detach+0x214/0x2f0
[ 715.708389] bus_remove_driver+0x11d/0x2f0
[ 715.712489] pci_unregister_driver+0x26/0x250
[ 71
---truncated---
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ice: corrige el bloqueo para el vaciado del seguimiento de la marca de tiempo de Tx. Commit 4dd0d5c33c3e ("ice: agrega bloqueo alrededor del vaciado del rastreador de marca de tiempo de Tx") agregó un bloqueo alrededor del flujo del rastreador de marca de tiempo de Tx que se utiliza para la sanitización. cualquier SKB sobrante y prepárese para retirar el dispositivo. Este bloqueo es problemático porque se mantiene en torno a una llamada a ice_clear_phy_tstamp. La función de borrado requiere un mutex para enviar un comando de escritura PHY al firmware. Esto podría llevar a un punto muerto si el mutex realmente duerme y causa la siguiente advertencia en un kernel con la depuración de prioridad habilitada: [715.419426] ERROR: función de dormir llamada desde un contexto no válido en kernel/locking/mutex.c:573 [715.427900] in_atomic (): 1, irqs_disabled(): 0, non_block: 0, pid: 3100, nombre: rmmod [715.435652] INFORMACIÓN: lockdep está desactivado. [715.439591] Prelación deshabilitada en: [715.439594] [<0000000000000000>] 0x0 [715.446678] CPU: 52 PID: 3100 Comm: rmmod Contaminado: GW OE 5.15.0-rc4+ #42 bdd7ec3018e725f 159ca0d372ce8c2c0e784891c [ 715.458058] Nombre del hardware: Intel Corporation S2600STQ/ S2600STQ, BIOS SE5C620.86B.02.01.0010.010620200716 06/01/2020 [715.468483] Seguimiento de llamadas: [715.470940] dump_stack_lvl+0x6a/0x9a [715.474613] ___might_sleep. frío+0x224/0x26a [ 715.478895] __mutex_lock+0xb3/0x1440 [ 715.482569] ? stack_depot_save+0x378/0x500 [715.486763]? ice_sq_send_cmd+0x78/0x14c0 [hielo 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.494979]? kfree+0xc1/0x520 [ 715.498128] ? mutex_lock_io_nested+0x12a0/0x12a0 [715.502837]? kasan_set_free_info+0x20/0x30 [715.507110]? __kasan_slab_free+0x10b/0x140 [715.511385] ? slab_free_freelist_hook+0xc7/0x220 [715.516092]? kfree+0xc1/0x520 [ 715.519235] ? ice_deinit_lag+0x16c/0x220 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.527359]? ice_remove+0x1cf/0x6a0 [hielo 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.535133]? pci_device_remove+0xab/0x1d0 [715.539318]? __device_release_driver+0x35b/0x690 [715.544110] ? driver_detach+0x214/0x2f0 [715.548035]? bus_remove_driver+0x11d/0x2f0 [715.552309]? pci_unregister_driver+0x26/0x250 [715.556840]? ice_module_exit+0xc/0x2f [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.564799]? __do_sys_delete_module.constprop.0+0x2d8/0x4e0 [715.570554]? do_syscall_64+0x3b/0x90 [715.574303]? entrada_SYSCALL_64_after_hwframe+0x44/0xae [715.579529]? start_flush_work+0x542/0x8f0 [715.583719]? ice_sq_send_cmd+0x78/0x14c0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.591923] ice_sq_send_cmd+0x78/0x14c0 [ice 9a7e1ec00971c89ecd3fe0d4dc 7da2b3786a421d] [715.599960]? wait_for_completion_io+0x250/0x250 [715.604662]? lock_acquire+0x196/0x200 [715.608504]? do_raw_spin_trylock+0xa5/0x160 [715.612864] ice_sbq_rw_reg+0x1e6/0x2f0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.620813]? ice_reset+0x130/0x130 [hielo 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.628497]? __debug_check_no_obj_freed+0x1e8/0x3c0 [715.633550]? trace_hardirqs_on+0x1c/0x130 [715.637748] ice_write_phy_reg_e810+0x70/0xf0 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.646220]? do_raw_spin_trylock+0xa5/0x160 [715.650581]? ice_ptp_release+0x910/0x910 [hielo 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.658797]? ice_ptp_release+0x255/0x910 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.667013] ice_clear_phy_tstamp+0x2c/0x110 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3 786a421d] [715.675403] ice_ptp_release+0x408/0x910 [ice 9a7e1ec00971c89ecd3fe0d4dc7da2b3786a421d] [715.683440] ice_remove+0x560/0x6a0 [ice 9a7e1ec00971 c89ecd3fe0d4dc7da2b3786a421d] [715.691037]? _raw_spin_unlock_irqrestore+0x46/0x73 [ 715.696005] pci_device_remove+0xab/0x1d0 [ 715.700018] __device_release_driver+0x35b/0x690 [ 715.704637] driver_detach+0x214/0x2f0 [ 715 .708389] bus_remove_driver+0x11d/0x2f0 [ 715.712489] pci_unregister_driver+0x26/0x250 [ 71 --- truncado---
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-21 CVE Reserved
- 2024-05-22 CVE Published
- 2024-05-22 EPSS Updated
- 2024-08-08 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-129: Improper Validation of Array Index
CAPEC
References (3)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/46720ac66c21bf85e08823664b7b314b85e43f26 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://git.kernel.org/stable/c/61616be899975404df44c20ab902464b60882cd7 | 2021-10-20 | |
| https://git.kernel.org/stable/c/4d4a223a86afe658cd878800f09458e8bb54415d | 2021-10-12 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.14.4 < 5.14.14 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.14.4 < 5.14.14" | en |
Affected
| ||||||