CVE-2021-47283
net:sfc: fix non-freed irq in legacy irq mode
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
net:sfc: fix non-freed irq in legacy irq mode
SFC driver can be configured via modparam to work using MSI-X, MSI or
legacy IRQ interrupts. In the last one, the interrupt was not properly
released on module remove.
It was not freed because the flag irqs_hooked was not set during
initialization in the case of using legacy IRQ.
Example of (trimmed) trace during module remove without this fix:
remove_proc_entry: removing non-empty directory 'irq/125', leaking at least '0000:3b:00.1'
WARNING: CPU: 39 PID: 3658 at fs/proc/generic.c:715 remove_proc_entry+0x15c/0x170
...trimmed...
Call Trace:
unregister_irq_proc+0xe3/0x100
free_desc+0x29/0x70
irq_free_descs+0x47/0x70
mp_unmap_irq+0x58/0x60
acpi_unregister_gsi_ioapic+0x2a/0x40
acpi_pci_irq_disable+0x78/0xb0
pci_disable_device+0xd1/0x100
efx_pci_remove+0xa1/0x1e0 [sfc]
pci_device_remove+0x38/0xa0
__device_release_driver+0x177/0x230
driver_detach+0xcb/0x110
bus_remove_driver+0x58/0xd0
pci_unregister_driver+0x2a/0xb0
efx_exit_module+0x24/0xf40 [sfc]
__do_sys_delete_module.constprop.0+0x171/0x280
? exit_to_user_mode_prepare+0x83/0x1d0
do_syscall_64+0x3d/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9f9385800b
...trimmed...
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net:sfc: corrige irq no liberado en modo irq heredado. El controlador SFC se puede configurar mediante modparam para que funcione usando interrupciones MSI-X, MSI o IRQ heredadas. En el último, la interrupción no se liberó correctamente al eliminar el módulo. No se liberó porque el indicador irqs_hooked no se estableció durante la inicialización en el caso de utilizar IRQ heredado. Ejemplo de seguimiento (recortado) durante la eliminación del módulo sin esta solución: remove_proc_entry: eliminando el directorio no vacío 'irq/125', filtrando al menos '0000:3b:00.1' ADVERTENCIA: CPU: 39 PID: 3658 en fs/proc/generic .c:715 remove_proc_entry+0x15c/0x170 ...recortado... Seguimiento de llamadas: unregister_irq_proc+0xe3/0x100 free_desc+0x29/0x70 irq_free_descs+0x47/0x70 mp_unmap_irq+0x58/0x60 acpi_unregister_gsi_ioapic+0x2a/0x 40 acpi_pci_irq_disable+0x78/0xb0 pci_disable_device +0xd1/0x100 efx_pci_remove+0xa1/0x1e0 [sfc] pci_device_remove+0x38/0xa0 __device_release_driver+0x177/0x230 driver_detach+0xcb/0x110 bus_remove_driver+0x58/0xd0 pci_unregister_driver+0x2a/0 xb0 efx_exit_module+0x24/0xf40 [sfc] __do_sys_delete_module.constprop.0 +0x171/0x280 ? exit_to_user_mode_prepare+0x83/0x1d0 do_syscall_64+0x3d/0x80 Entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9f9385800b ...recortado...
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-21 CVE Reserved
- 2024-05-21 CVE Published
- 2024-05-22 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (3)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| 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" | < 5.10.44 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.44" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.12.11 Search vendor "Linux" for product "Linux Kernel" and version " < 5.12.11" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " < 5.13" | en |
Affected
| ||||||