CVE-2023-52730

mmc: sdio: fix possible resource leaks in some error paths

Severity Score

4.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved:

mmc: sdio: fix possible resource leaks in some error paths

If sdio_add_func() or sdio_init_func() fails, sdio_remove_func() can
not release the resources, because the sdio function is not presented
in these two cases, it won't call of_node_put() or put_device().

To fix these leaks, make sdio_func_present() only control whether
device_del() needs to be called or not, then always call of_node_put()
and put_device().

In error case in sdio_init_func(), the reference of 'card->dev' is
not get, to avoid redundant put in sdio_free_func_cis(), move the
get_device() to sdio_alloc_func() and put_device() to sdio_release_func(),
it can keep the get/put function be balanced.

Without this patch, while doing fault inject test, it can get the
following leak reports, after this fix, the leak is gone.

unreferenced object 0xffff888112514000 (size 2048):
comm "kworker/3:2", pid 65, jiffies 4294741614 (age 124.774s)
hex dump (first 32 bytes):
00 e0 6f 12 81 88 ff ff 60 58 8d 06 81 88 ff ff ..o.....`X......
10 40 51 12 81 88 ff ff 10 40 51 12 81 88 ff ff .@Q......@Q.....
backtrace:
[<000000009e5931da>] kmalloc_trace+0x21/0x110
[<000000002f839ccb>] mmc_alloc_card+0x38/0xb0 [mmc_core]
[<0000000004adcbf6>] mmc_sdio_init_card+0xde/0x170 [mmc_core]
[<000000007538fea0>] mmc_attach_sdio+0xcb/0x1b0 [mmc_core]
[<00000000d4fdeba7>] mmc_rescan+0x54a/0x640 [mmc_core]

unreferenced object 0xffff888112511000 (size 2048):
comm "kworker/3:2", pid 65, jiffies 4294741623 (age 124.766s)
hex dump (first 32 bytes):
00 40 51 12 81 88 ff ff e0 58 8d 06 81 88 ff ff .@Q......X......
10 10 51 12 81 88 ff ff 10 10 51 12 81 88 ff ff ..Q.......Q.....
backtrace:
[<000000009e5931da>] kmalloc_trace+0x21/0x110
[<00000000fcbe706c>] sdio_alloc_func+0x35/0x100 [mmc_core]
[<00000000c68f4b50>] mmc_attach_sdio.cold.18+0xb1/0x395 [mmc_core]
[<00000000d4fdeba7>] mmc_rescan+0x54a/0x640 [mmc_core]

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mmc: sdio: soluciona posibles fugas de recursos en algunas rutas de error. Si sdio_add_func() o sdio_init_func() falla, sdio_remove_func() no puede liberar los recursos, porque no se presenta la función sdio en estos dos casos, no llamará a of_node_put() o put_device(). Para solucionar estas fugas, haga que sdio_func_present() solo controle si es necesario llamar a device_del() o no, luego llame siempre a of_node_put() y put_device(). En caso de error en sdio_init_func(), la referencia de 'card->dev' no se obtiene, para evitar la colocación redundante en sdio_free_func_cis(), mueva get_device() a sdio_alloc_func() y put_device() a sdio_release_func(), puede mantenga equilibrada la función get/put. Sin este parche, mientras realiza la prueba de inyección de fallas, puede obtener los siguientes informes de fugas; después de esta solución, la fuga desaparece. objeto sin referencia 0xffff888112514000 (tamaño 2048): comunicación "kworker/3:2", pid 65, jiffies 4294741614 (edad 124,774 s) volcado hexadecimal (primeros 32 bytes): 00 e0 6f 12 81 88 ff ff 60 58 8d 06 81 8 y siguientes ff ..o.....`X...... 10 40 51 12 81 88 ff ff 10 40 51 12 81 88 ff ff .@Q......@Q..... retroceso : [<000000009e5931da>] kmalloc_trace+0x21/0x110 [<000000002f839ccb>] mmc_alloc_card+0x38/0xb0 [mmc_core] [<0000000004adcbf6>] mmc_sdio_init_card+0xde/0x170 [mmc_core] [<000000007538fea0>] mmc_attach_sdio+0xcb/0x1b0 [mmc_core] [<00000000d4fdeba7>] mmc_rescan+0x54a/0x640 [mmc_core] objeto sin referencia 0xffff888112511000 (tamaño 2048): comm "kworker/3:2", pid 65, santiamén 4294741623 (edad 124,766 s) volcado hexadecimal (primero 32 bytes): 00 40 51 12 81 88 ff ff e0 58 8d 06 81 88 ff ff .@Q......X...... 10 10 51 12 81 88 ff ff 10 10 51 12 81 88 ff ff ..Q. ......P..... rastreo inverso: [<000000009e5931da>] kmalloc_trace+0x21/0x110 [<00000000fcbe706c>] sdio_alloc_func+0x35/0x100 [mmc_core] [<00000000c68f4b50>] mmc_attach_sdio.cold. 18+0xb1/ 0x395 [mmc_core] [<00000000d4fdeba7>] mmc_rescan+0x54a/0x640 [mmc_core]

*Credits: N/A

CVSS Scores

Red Hatv3.1 4.4

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-05-21 CVE Reserved
2024-05-21 CVE Published
2024-05-22 EPSS Updated
2024-11-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak')

CAPEC

References (10)

URL	Tag	Source
https://git.kernel.org/stable/c/3d10a1ba0d37c8f5fd5afcdda00613fbb8a90bf5	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/92ff03c2563c9b57a027c744750f3b7d2f261c58	2023-02-22
https://git.kernel.org/stable/c/5c7858adada31dbed042448cff6997dd6efc472a	2023-02-22
https://git.kernel.org/stable/c/761db46b29b496946046d8cb33c7ea6de6bef36e	2023-02-22
https://git.kernel.org/stable/c/30716d9f0fa1766e522cf24c8a456244e4fc9931	2023-02-22
https://git.kernel.org/stable/c/1e06cf04239e202248c8fa356bf11449dc73cfbd	2023-02-22
https://git.kernel.org/stable/c/f855d31bb38d663c3ba672345d7cce9324ba3b72	2023-02-22
https://git.kernel.org/stable/c/605d9fb9556f8f5fb4566f4df1480f280f308ded	2023-02-13

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-52730	2024-11-12
https://bugzilla.redhat.com/show_bug.cgi?id=2282640	2024-11-12

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"				>= 2.6.33 < 4.14.306 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.33 < 4.14.306"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.33 < 4.19.273 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.33 < 4.19.273"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.33 < 5.4.232 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.33 < 5.4.232"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.33 < 5.10.169 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.33 < 5.10.169"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.33 < 5.15.95 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.33 < 5.15.95"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.33 < 6.1.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.33 < 6.1.13"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.33 < 6.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.33 < 6.2"		en		Affected