Skip to content
OpenAdvisories
Medium · 5.5 CVE-2022-49880 EUVD-2025-12895GHSA-6qgr-97mx-84hr

ext4: fix warning in 'ext4_da_release_space'

Published May 1, 2025 · Updated May 11, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-fips Package: linux-aws-hwe Package: linux-azure Package: linux-azure-4.15 Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-4.15 Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lts-xenial Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.5 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

ext4: fix warning in 'ext4_da_release_space'

Syzkaller report issue as follows:
EXT4-fs (loop0): Free/Dirty block details
EXT4-fs (loop0): free_blocks=0
EXT4-fs (loop0): dirty_blocks=0
EXT4-fs (loop0): Block reservation details
EXT4-fs (loop0): i_reserved_data_blocks=0
EXT4-fs warning (device loop0): ext4_da_release_space:1527: ext4_da_release_space: ino 18, to_free 1 with only 0 reserved data blocks
------------[ cut here ]------------
WARNING: CPU: 0 PID: 92 at fs/ext4/inode.c:1528 ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1524
Modules linked in:
CPU: 0 PID: 92 Comm: kworker/u4:4 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1528
RSP: 0018:ffffc900015f6c90 EFLAGS: 00010296
RAX: 42215896cd52ea00 RBX: 0000000000000000 RCX: 42215896cd52ea00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: 1ffff1100e907d96 R08: ffffffff816aa79d R09: fffff520002bece5
R10: fffff520002bece5 R11: 1ffff920002bece4 R12: ffff888021fd2000
R13: ffff88807483ecb0 R14: 0000000000000001 R15: ffff88807483e740
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555569ba628 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
ext4_es_remove_extent+0x1ab/0x260 fs/ext4/extents_status.c:1461
mpage_release_unused_pages+0x24d/0xef0 fs/ext4/inode.c:1589
ext4_writepages+0x12eb/0x3be0 fs/ext4/inode.c:2852
do_writepages+0x3c3/0x680 mm/page-writeback.c:2469
__writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587
writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870
wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2044
wb_do_writeback fs/fs-writeback.c:2187 [inline]
wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2227
process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>

Above issue may happens as follows:
ext4_da_write_begin
ext4_create_inline_data
ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA);
__ext4_ioctl
ext4_ext_migrate -> will lead to eh->eh_entries not zero, and set extent flag
ext4_da_write_begin
ext4_da_convert_inline_data_to_extent
ext4_da_write_inline_data_begin
ext4_da_map_blocks
ext4_insert_delayed_block
if (!ext4_es_scan_clu(inode, &ext4_es_is_delonly, lblk))
if (!ext4_es_scan_clu(inode, &ext4_es_is_mapped, lblk))
ext4_clu_mapped(inode, EXT4_B2C(sbi, lblk)); -> will return 1
allocated = true;
ext4_es_insert_delayed_block(inode, lblk, allocated);
ext4_writepages
mpage_map_and_submit_extent(handle, &mpd, &give_up_on_write); -> return -ENOSPC
mpage_release_unused_pages(&mpd, give_up_on_write); -> give_up_on_write == 1
ext4_es_remove_extent
ext4_da_release_space(inode, reserved);
if (unlikely(to_free > ei->i_reserved_data_blocks))
-> to_free == 1 but ei->i_reserved_data_blocks == 0
-> then trigger warning as above

To solve above issue, forbid inode do migrate which has inline data.

Affected products

VendorProductAffectedFixed
Linux Linux 3.8 4.9.333

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.0.8-1 —
Debian 13 linux 6.0.8-1 —
Debian 12 linux 6.0.8-1 —
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1014.16 —
Ubuntu 24.04 LTS linux-realtime +1 No fix yet —
Ubuntu 22.04 LTS linux +1 5.15.0-60.66 —
Ubuntu 22.04 LTS linux-aws 5.15.0-1030.34 —
Ubuntu 22.04 LTS linux-azure 5.15.0-1033.40 —
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1033.40.1 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1029.36 —
Ubuntu 22.04 LTS linux-gke 5.15.0-1027.32 —
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1015.19 —
Ubuntu 22.04 LTS linux-ibm 5.15.0-1025.28 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1025.30 —
Ubuntu 22.04 LTS linux-kvm 5.15.0-1028.33 —
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1017.17 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1029.35 —
Ubuntu 22.04 LTS linux-raspi 5.15.0-1024.26 —
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 20.04 LTS linux 5.4.0-139.156 —
Ubuntu 20.04 LTS linux-aws 5.4.0-1096.104 —
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1030.34~20.04.1 —
Ubuntu 20.04 LTS linux-azure 5.4.0-1103.109 —
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1033.40~20.04.1 —
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1058.64 —
Ubuntu 20.04 LTS linux-gcp 5.4.0-1100.109 —
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1029.36~20.04.1 —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-60.66~20.04.1 —
Ubuntu 20.04 LTS linux-ibm 5.4.0-1044.49 —
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1025.30~20.04.1 —
Ubuntu 20.04 LTS linux-iot 5.4.0-1012.14 —
Ubuntu 20.04 LTS linux-kvm 5.4.0-1086.92 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1093.102 —
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1029.35~20.04.1 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1080.91 —
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1029.33~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1021.25 —
Ubuntu 18.04 LTS linux 4.15.0-206.217 —
Ubuntu 18.04 LTS linux-aws 4.15.0-1151.164 —
Ubuntu 18.04 LTS linux-aws-5.4 5.4.0-1096.104~18.04.1 —
Ubuntu 18.04 LTS linux-azure-4.15 4.15.0-1162.177 —
Ubuntu 18.04 LTS linux-azure-5.4 5.4.0-1103.109~18.04.1 —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 18.04 LTS linux-gcp-4.15 4.15.0-1146.162 —
Ubuntu 18.04 LTS linux-gcp-5.4 5.4.0-1100.109~18.04.1 —
Ubuntu 18.04 LTS linux-hwe-5.4 5.4.0-139.156~18.04.1 —
Ubuntu 18.04 LTS linux-ibm-5.4 5.4.0-1044.49~18.04.1 —
Ubuntu 18.04 LTS linux-kvm 4.15.0-1136.141 —
Ubuntu 18.04 LTS linux-oracle 4.15.0-1115.126 —
Ubuntu 18.04 LTS linux-oracle-5.4 5.4.0-1093.102~18.04.1 —
Ubuntu 18.04 LTS linux-raspi-5.4 5.4.0-1080.91~18.04.1 —
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 18.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 16.04 LTS linux-fips No fix yet —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1096.104+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1103.109+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1072.81 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1100.109+fips1 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-aws-fips 4.15.0-2090.96 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-azure-fips 4.15.0-2071.77 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips 4.15.0-1108.119 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-gcp-fips 4.15.0-2055.60 —
Ubuntu Pro FIPS-updates 16.04 LTS linux-fips No fix yet —
Ubuntu Pro 16.04 LTS linux +2 No fix yet —
Ubuntu Pro 16.04 LTS linux-aws-hwe 4.15.0-1151.164~16.04.1 —
Ubuntu Pro 16.04 LTS linux-azure 4.15.0-1162.177~16.04.1 —
Ubuntu Pro 16.04 LTS linux-gcp 4.15.0-1146.162~16.04.1 —
Ubuntu Pro 16.04 LTS linux-hwe 4.15.0-206.217~16.04.1 —
Ubuntu Pro 16.04 LTS linux-oracle 4.15.0-1115.126~16.04.1 —
Ubuntu Pro 14.04 LTS linux +2 No fix yet —
Ubuntu Pro 14.04 LTS linux-azure 4.15.0-1162.177~14.04.1 —
ReleasePackageFixed inAdvisory
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.110.1 SUSE-SU-2025:02173-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.110.1.150500.6.51.3 SUSE-SU-2025:02173-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.167.1 SUSE-SU-2025:02262-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.167.1.150400.24.84.1 SUSE-SU-2025:02262-1
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.207.1 SUSE-SU-2025:01982-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.207.1.150300.18.124.1 SUSE-SU-2025:01982-1
SLES 12 SP5 kernel-syms +2 4.12.14-122.261.1 SUSE-SU-2025:01983-1
Show 18 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 15 SP5 kernel-default-base 5.14.21-150500.55.110.1.150500.6.51.3 SUSE-SU-2025:02173-1
SLES for SAP 15 SP5 kernel-docs +4 5.14.21-150500.55.110.1 SUSE-SU-2025:02173-1
SLES for SAP 15 SP4 kernel-default-base 5.14.21-150400.24.167.1.150400.24.84.1 SUSE-SU-2025:02262-1
SLES for SAP 15 SP4 kernel-docs +4 5.14.21-150400.24.167.1 SUSE-SU-2025:02262-1
SLES for SAP 15 SP3 kernel-default-base 5.3.18-150300.59.207.1.150300.18.124.1 SUSE-SU-2025:01982-1
SLES for SAP 15 SP3 kernel-docs +5 5.3.18-150300.59.207.1 SUSE-SU-2025:01982-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.110.1.150500.6.51.3 SUSE-SU-2025:02173-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.97.1 SUSE-SU-2025:01966-1
SLE Micro 5.5 kernel-source +1 5.14.21-150500.55.110.1 SUSE-SU-2025:02173-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.167.1 SUSE-SU-2025:02262-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.167.1.150400.24.84.1 SUSE-SU-2025:02262-1
SLE Micro 5.4 kernel-rt +1 5.14.21-150400.15.121.1 SUSE-SU-2025:01918-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.167.1 SUSE-SU-2025:02262-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.167.1.150400.24.84.1 SUSE-SU-2025:02262-1
SLE Micro 5.3 kernel-rt +1 5.14.21-150400.15.121.1 SUSE-SU-2025:01918-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.207.1 SUSE-SU-2025:01982-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.207.1.150300.18.124.1 SUSE-SU-2025:01982-1
SLE Micro 5.2 kernel-rt +1 5.3.18-150300.211.1 SUSE-SU-2025:01995-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.207.1 SUSE-SU-2025:01982-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.207.1.150300.18.124.1 SUSE-SU-2025:01982-1
SLE Micro 5.1 kernel-rt +1 5.3.18-150300.211.1 SUSE-SU-2025:01995-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.110.1 SUSE-SU-2025:02173-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_27 1-150500.11.7.1 SUSE-SU-2025:02173-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.167.1 SUSE-SU-2025:02262-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_41 1-150400.9.3.1 SUSE-SU-2025:02262-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.207.1 SUSE-SU-2025:01982-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_58 1-150300.7.3.1 SUSE-SU-2025:01982-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.261.1 SUSE-SU-2025:01983-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_69 1-8.3.1 SUSE-SU-2025:01983-1
SLE HPC 15 SP5 kernel-64kb +5 5.14.21-150500.55.110.1 SUSE-SU-2025:02173-1
SLE HPC 15 SP5 kernel-default-base 5.14.21-150500.55.110.1.150500.6.51.3 SUSE-SU-2025:02173-1
SLE HPC 15 SP4 kernel-64kb +5 5.14.21-150400.24.167.1 SUSE-SU-2025:02262-1
SLE HPC 15 SP4 kernel-default-base 5.14.21-150400.24.167.1.150400.24.84.1 SUSE-SU-2025:02262-1
SLE HPC 15 SP3 kernel-64kb +6 5.3.18-150300.59.207.1 SUSE-SU-2025:01982-1
SLE HPC 15 SP3 kernel-default-base 5.3.18-150300.59.207.1.150300.18.124.1 SUSE-SU-2025:01982-1
SUSE Manager Server 4.3 kernel-default-base 5.14.21-150400.24.167.1.150400.24.84.1 SUSE-SU-2025:02262-1
SUSE Manager Server 4.3 kernel-syms +3 5.14.21-150400.24.167.1 SUSE-SU-2025:02262-1
SUSE Manager Proxy 4.3 kernel-default-base 5.14.21-150400.24.167.1.150400.24.84.1 SUSE-SU-2025:02262-1
SUSE Manager Proxy 4.3 kernel-syms +2 5.14.21-150400.24.167.1 SUSE-SU-2025:02262-1
SUSE Enterprise Storage 7.1 kernel-64kb +6 5.3.18-150300.59.207.1 SUSE-SU-2025:01982-1
SUSE Enterprise Storage 7.1 kernel-default-base 5.3.18-150300.59.207.1.150300.18.124.1 SUSE-SU-2025:01982-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2 kernel-livepatch-4.14.299-223.520 1.0-0.amzn2 ALAS2-2022-1888
Amazon Linux 2 perf +8 4.14.299-223.520.amzn2 ALAS2-2022-1888

Advisories 9

References