---
id: CVE-2022-50304
title: 'mtd: core: fix possible resource leak in init_mtd()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  mtd: core: fix possible resource leak in init_mtd()

  I got the error report while inject fault in init_mtd():

  sysfs: cannot create duplicate filename '/devices/virtual…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 445caaa20c4d6da74f426464f90513b81157ad77 <
    78816504100cbd8e6836df9f58cc4fbb8b262f1c
  - >-
    Linux >= 445caaa20c4d6da74f426464f90513b81157ad77 <
    26c304a3f136009c5a2a04e2bf3ac6aa25aabcb4
  - >-
    Linux >= 445caaa20c4d6da74f426464f90513b81157ad77 <
    1aadf01e5076b9ab6bf294b9622335c651314895
  - Linux 4.10
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:09:17.431370Z'
published: '2025-09-15'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:10:33.759Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-50304'
references:
  - url: 'https://git.kernel.org/stable/c/78816504100cbd8e6836df9f58cc4fbb8b262f1c'
  - url: 'https://git.kernel.org/stable/c/26c304a3f136009c5a2a04e2bf3ac6aa25aabcb4'
  - url: 'https://git.kernel.org/stable/c/1aadf01e5076b9ab6bf294b9622335c651314895'
tags:
  - cve.org
epss: 0.00157
epssPercentile: 0.0491
ingestedAt: '2026-11-05T22:38:31.722Z'
---

## Overview

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

mtd: core: fix possible resource leak in init_mtd()

I got the error report while inject fault in init_mtd():

sysfs: cannot create duplicate filename '/devices/virtual/bdi/mtd-0'
Call Trace:
 <TASK>
 dump_stack_lvl+0x67/0x83
 sysfs_warn_dup+0x60/0x70
 sysfs_create_dir_ns+0x109/0x120
 kobject_add_internal+0xce/0x2f0
 kobject_add+0x98/0x110
 device_add+0x179/0xc00
 device_create_groups_vargs+0xf4/0x100
 device_create+0x7b/0xb0
 bdi_register_va.part.13+0x58/0x2d0
 bdi_register+0x9b/0xb0
 init_mtd+0x62/0x171 [mtd]
 do_one_initcall+0x6c/0x3c0
 do_init_module+0x58/0x222
 load_module+0x268e/0x27d0
 __do_sys_finit_module+0xd5/0x140
 do_syscall_64+0x37/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
 </TASK>
kobject_add_internal failed for mtd-0 with -EEXIST, don't try to register
	things with the same name in the same directory.
Error registering mtd class or bdi: -17

If init_mtdchar() fails in init_mtd(), mtd_bdi will not be unregistered,
as a result, we can't load the mtd module again, to fix this by calling
bdi_unregister(mtd_bdi) after out_procfs label.

## Affected

- `Linux >= 445caaa20c4d6da74f426464f90513b81157ad77 < 78816504100cbd8e6836df9f58cc4fbb8b262f1c`
- `Linux >= 445caaa20c4d6da74f426464f90513b81157ad77 < 26c304a3f136009c5a2a04e2bf3ac6aa25aabcb4`
- `Linux >= 445caaa20c4d6da74f426464f90513b81157ad77 < 1aadf01e5076b9ab6bf294b9622335c651314895`
- `Linux 4.10`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.