---
id: CVE-2022-50082
title: 'ext4: fix warning in ext4_iomap_begin as race between bmap and write'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ext4: fix warning in ext4_iomap_begin as race between bmap and write

  We got issue as follows:
  ------------[ cut here ]------------
  WARNING: CPU: 3 PID: 9310 at fs/ext4…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 <
    e1682c7171a6c0ff576fe8116b8cba5b8f538b94
  - >-
    Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 <
    30dfb75e1f8645404a536c74d468d498adcd4e74
  - >-
    Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 <
    a9fe6d1e3d343d7309f501b1f48020ce7127221f
  - >-
    Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 <
    fa6482f374fda29a71ad44d76d35b4842d43cda4
  - >-
    Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 <
    51ae846cff568c8c29921b1b28eb2dfbcd4ac12d
  - Linux 5.7
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T19:54:09.423802Z'
published: '2025-06-18'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:00:16.295Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-50082'
references:
  - url: 'https://git.kernel.org/stable/c/e1682c7171a6c0ff576fe8116b8cba5b8f538b94'
  - url: 'https://git.kernel.org/stable/c/30dfb75e1f8645404a536c74d468d498adcd4e74'
  - url: 'https://git.kernel.org/stable/c/a9fe6d1e3d343d7309f501b1f48020ce7127221f'
  - url: 'https://git.kernel.org/stable/c/fa6482f374fda29a71ad44d76d35b4842d43cda4'
  - url: 'https://git.kernel.org/stable/c/51ae846cff568c8c29921b1b28eb2dfbcd4ac12d'
tags:
  - cve.org
epss: 0.00194
epssPercentile: 0.09127
ingestedAt: '2026-11-05T22:38:31.649Z'
---

## Overview

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

ext4: fix warning in ext4_iomap_begin as race between bmap and write

We got issue as follows:
------------[ cut here ]------------
WARNING: CPU: 3 PID: 9310 at fs/ext4/inode.c:3441 ext4_iomap_begin+0x182/0x5d0
RIP: 0010:ext4_iomap_begin+0x182/0x5d0
RSP: 0018:ffff88812460fa08 EFLAGS: 00010293
RAX: ffff88811f168000 RBX: 0000000000000000 RCX: ffffffff97793c12
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: ffff88812c669160 R08: ffff88811f168000 R09: ffffed10258cd20f
R10: ffff88812c669077 R11: ffffed10258cd20e R12: 0000000000000001
R13: 00000000000000a4 R14: 000000000000000c R15: ffff88812c6691ee
FS:  00007fd0d6ff3740(0000) GS:ffff8883af180000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd0d6dda290 CR3: 0000000104a62000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 iomap_apply+0x119/0x570
 iomap_bmap+0x124/0x150
 ext4_bmap+0x14f/0x250
 bmap+0x55/0x80
 do_vfs_ioctl+0x952/0xbd0
 __x64_sys_ioctl+0xc6/0x170
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Above issue may happen as follows:
          bmap                    write
bmap
  ext4_bmap
    iomap_bmap
      ext4_iomap_begin
                            ext4_file_write_iter
			      ext4_buffered_write_iter
			        generic_perform_write
				  ext4_da_write_begin
				    ext4_da_write_inline_data_begin
				      ext4_prepare_inline_data
				        ext4_create_inline_data
					  ext4_set_inode_flag(inode,
						EXT4_INODE_INLINE_DATA);
      if (WARN_ON_ONCE(ext4_has_inline_data(inode))) ->trigger bug_on

To solved above issue hold inode lock in ext4_bamp.

## Affected

- `Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 < e1682c7171a6c0ff576fe8116b8cba5b8f538b94`
- `Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 < 30dfb75e1f8645404a536c74d468d498adcd4e74`
- `Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 < a9fe6d1e3d343d7309f501b1f48020ce7127221f`
- `Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 < fa6482f374fda29a71ad44d76d35b4842d43cda4`
- `Linux >= ac58e4fb03f9d111d733a4ad379d06eef3a24705 < 51ae846cff568c8c29921b1b28eb2dfbcd4ac12d`
- `Linux 5.7`

## Remediation

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