RDMA/hns: Fix soft lockup during bt pages loop
Published Apr 8, 2025
5.5
MEDIUMCVSS 3.1
EPSS 0.16%
Description
Driver runs a for-loop when allocating bt pages and mapping them with buffer pages. When a large buffer (e.g. MR over 100GB) is being allocated, it may require a considerable loop count. This will lead to soft lockup:
watchdog: BUG: soft lockup - CPU#27 stuck for 22s! ... Call trace: hem_list_alloc_mid_bt+0x124/0x394 [hns_roce_hw_v2] hns_roce_hem_list_request+0xf8/0x160 [hns_roce_hw_v2] hns_roce_mtr_create+0x2e4/0x360 [hns_roce_hw_v2] alloc_mr_pbl+0xd4/0x17c [hns_roce_hw_v2] hns_roce_reg_user_mr+0xf8/0x190 [hns_roce_hw_v2] ib_uverbs_reg_mr+0x118/0x290
watchdog: BUG: soft lockup - CPU#35 stuck for 23s! ... Call trace: hns_roce_hem_list_find_mtt+0x7c/0xb0 [hns_roce_hw_v2] mtr_map_bufs+0xc4/0x204 [hns_roce_hw_v2] hns_roce_mtr_create+0x31c/0x3c4 [hns_roce_hw_v2] alloc_mr_pbl+0xb0/0x160 [hns_roce_hw_v2] hns_roce_reg_user_mr+0x108/0x1c0 [hns_roce_hw_v2] ib_uverbs_reg_mr+0x120/0x2bc
Add a cond_resched() to fix soft lockup during these loops. In order not to affect the allocation performance of normal-size buffer, set the loop count of a 100GB MR as the threshold to call cond_resched().
Affected products
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- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 5.3StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<5.3
- Version 5.10.236StatusunaffectedConstraints<=5.10.*
- Version 5.15.180StatusunaffectedConstraints<=5.15.*
- Version 6.1.132StatusunaffectedConstraints<=6.1.*
- Version 6.12.21StatusunaffectedConstraints<=6.12.*
- Version 6.13.9StatusunaffectedConstraints<=6.13.*
- Version 6.14StatusunaffectedConstraints<=*
- Version 6.6.85StatusunaffectedConstraints<=6.6.*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
| ||||||||||||||||||||||||||||||
| Linux | Linux | affected |
|
- ≥ 5.3 · < 6.1.132
- ≥ 6.2 · < 6.6.85
- ≥ 6.7 · < 6.12.21
- ≥ 6.13 · < 6.13.9
- 6.14
- 6.14
- 6.14
- 6.14
- 6.14
- 6.14
- 6.14
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.16% (0.00163) | 4.95th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.13% (0.00134) | 3.19th | v5 (v2026.06.15) |
| Apr 8, 2025 | 0.02% (0.00018) | 2.47th | v4 (v2025.03.14) |
References (14)
- https://access.redhat.com/security/cve/CVE-2025-22010 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2358219 Issue Tracking
- https://git.kernel.org/stable/c/13a52f6c9ff99f7d88f81da535cb4e85eade662b Patch
- https://git.kernel.org/stable/c/25655580136de59ec89f09089dd28008ea440fc9 Patch
- https://git.kernel.org/stable/c/4104b0023ff66b5df900d23dbf38310893deca79 Patch
- https://git.kernel.org/stable/c/461eb4ddede266df8f181f578732bb01742c3fd6
- https://git.kernel.org/stable/c/975355faba56c0751292ed15a90c3e2c7dc0aad6 Patch
- https://git.kernel.org/stable/c/9ab20fec7a1ce3057ad86afd27bfd08420b7cd11 Patch
- https://git.kernel.org/stable/c/efe544462fc0b499725364f90bd0f8bbf16f861a
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
- https://lore.kernel.org/linux-cve-announce/2025040843-CVE-2025-22010-82d7@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2025-22010
- https://www.cve.org/CVERecord?id=CVE-2025-22010
Change history (0)
No recorded changes yet.