topology: Keep the cpumask unchanged when printing cpumap
During fuzz testing, the following warning was discovered:
different return values (15 and 11) from vsnprintf("%*pbl
", ...)
test:keyward is WARNING in kvasprintf
WARNING: CPU: 55 PID: 1168477 at lib/kasprintf.c:30 kvasprintf+0x121/0x130
Call Trace:
kvasprintf+0x121/0x130
kasprintf+0xa6/0xe0
bitmap_print_to_buf+0x89/0x100
core_siblings_list_read+0x7e/0xb0
kernfs_file_read_iter+0x15b/0x270
new_sync_read+0x153/0x260
vfs_read+0x215/0x290
ksys_read+0xb9/0x160
do_syscall_64+0x56/0x100
entry_SYSCALL_64_after_hwframe+0x78/0xe2
The call trace shows that kvasprintf() reported this warning during the
printing of core_siblings_list. kvasprintf() has several steps:
(1) First, calculate the length of the resulting formatted string.
(2) Allocate a buffer based on the returned length.
(3) Then, perform the actual string formatting.
(4) Check whether the lengths of the formatted strings returned in
steps (1) and (2) are consistent.
If the core_cpumask is modified between steps (1) and (3), the lengths
obtained in these two steps may not match. Indeed our test includes cpu
hotplugging, which should modify core_cpumask while printing.
To fix this issue, cache the cpumask into a temporary variable before
calling cpumap_print_{list, cpumask}_to_buf(), to keep it unchanged
during the printing process.
Metrics
Affected Vendors & Products
Source | ID | Title |
---|---|---|
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DLA-4076-1 | linux-6.1 security update |
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EUVD-2024-53820 | In the Linux kernel, the following vulnerability has been resolved: topology: Keep the cpumask unchanged when printing cpumap During fuzz testing, the following warning was discovered: different return values (15 and 11) from vsnprintf("%*pbl ", ...) test:keyward is WARNING in kvasprintf WARNING: CPU: 55 PID: 1168477 at lib/kasprintf.c:30 kvasprintf+0x121/0x130 Call Trace: kvasprintf+0x121/0x130 kasprintf+0xa6/0xe0 bitmap_print_to_buf+0x89/0x100 core_siblings_list_read+0x7e/0xb0 kernfs_file_read_iter+0x15b/0x270 new_sync_read+0x153/0x260 vfs_read+0x215/0x290 ksys_read+0xb9/0x160 do_syscall_64+0x56/0x100 entry_SYSCALL_64_after_hwframe+0x78/0xe2 The call trace shows that kvasprintf() reported this warning during the printing of core_siblings_list. kvasprintf() has several steps: (1) First, calculate the length of the resulting formatted string. (2) Allocate a buffer based on the returned length. (3) Then, perform the actual string formatting. (4) Check whether the lengths of the formatted strings returned in steps (1) and (2) are consistent. If the core_cpumask is modified between steps (1) and (3), the lengths obtained in these two steps may not match. Indeed our test includes cpu hotplugging, which should modify core_cpumask while printing. To fix this issue, cache the cpumask into a temporary variable before calling cpumap_print_{list, cpumask}_to_buf(), to keep it unchanged during the printing process. |
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USN-7379-1 | Linux kernel vulnerabilities |
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USN-7379-2 | Linux kernel (Raspberry Pi) vulnerabilities |
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USN-7380-1 | Linux kernel (Low Latency) vulnerabilities |
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USN-7381-1 | Linux kernel (Low Latency) vulnerabilities |
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USN-7382-1 | Linux kernel (OEM) vulnerabilities |
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USN-7387-1 | Linux kernel vulnerabilities |
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USN-7387-2 | Linux kernel (FIPS) vulnerabilities |
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USN-7387-3 | Linux kernel (Real-time) vulnerabilities |
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USN-7388-1 | Linux kernel vulnerabilities |
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USN-7389-1 | Linux kernel (NVIDIA Tegra) vulnerabilities |
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USN-7390-1 | Linux kernel (Xilinx ZynqMP) vulnerabilities |
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USN-7407-1 | Linux kernel (HWE) vulnerabilities |
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USN-7421-1 | Linux kernel (Azure) vulnerabilities |
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USN-7458-1 | Linux kernel (IBM) vulnerabilities |
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USN-7459-1 | Linux kernel (Intel IoTG) vulnerabilities |
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USN-7459-2 | Linux kernel (GCP) vulnerabilities |
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USN-7513-1 | Linux kernel vulnerabilities |
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USN-7513-2 | Linux kernel (Real-time) vulnerabilities |
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USN-7513-3 | Linux kernel vulnerabilities |
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USN-7513-4 | Linux kernel (HWE) vulnerabilities |
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USN-7513-5 | Linux kernel (Oracle) vulnerabilities |
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USN-7514-1 | Linux kernel (NVIDIA) vulnerabilities |
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USN-7515-1 | Linux kernel (GKE) vulnerabilities |
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USN-7515-2 | Linux kernel vulnerabilities |
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USN-7522-1 | Linux kernel (Azure, N-Series) vulnerabilities |
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USN-7523-1 | Linux kernel (Raspberry Pi Real-time) vulnerabilities |
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USN-7524-1 | Linux kernel (Raspberry Pi) vulnerabilities |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Thu, 16 Oct 2025 20:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | NVD-CWE-noinfo | |
CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:* |
|
Metrics |
cvssV3_1
|
cvssV3_1
|
Thu, 13 Feb 2025 01:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | CWE-362 | |
Metrics |
cvssV3_1
|
cvssV3_1
|
Thu, 23 Jan 2025 17:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
References |
|
Mon, 20 Jan 2025 14:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
References |
| |
Metrics |
threat_severity
|
cvssV3_1
|
Sun, 19 Jan 2025 12:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Description | In the Linux kernel, the following vulnerability has been resolved: topology: Keep the cpumask unchanged when printing cpumap During fuzz testing, the following warning was discovered: different return values (15 and 11) from vsnprintf("%*pbl ", ...) test:keyward is WARNING in kvasprintf WARNING: CPU: 55 PID: 1168477 at lib/kasprintf.c:30 kvasprintf+0x121/0x130 Call Trace: kvasprintf+0x121/0x130 kasprintf+0xa6/0xe0 bitmap_print_to_buf+0x89/0x100 core_siblings_list_read+0x7e/0xb0 kernfs_file_read_iter+0x15b/0x270 new_sync_read+0x153/0x260 vfs_read+0x215/0x290 ksys_read+0xb9/0x160 do_syscall_64+0x56/0x100 entry_SYSCALL_64_after_hwframe+0x78/0xe2 The call trace shows that kvasprintf() reported this warning during the printing of core_siblings_list. kvasprintf() has several steps: (1) First, calculate the length of the resulting formatted string. (2) Allocate a buffer based on the returned length. (3) Then, perform the actual string formatting. (4) Check whether the lengths of the formatted strings returned in steps (1) and (2) are consistent. If the core_cpumask is modified between steps (1) and (3), the lengths obtained in these two steps may not match. Indeed our test includes cpu hotplugging, which should modify core_cpumask while printing. To fix this issue, cache the cpumask into a temporary variable before calling cpumap_print_{list, cpumask}_to_buf(), to keep it unchanged during the printing process. | |
Title | topology: Keep the cpumask unchanged when printing cpumap | |
References |
|

Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-05-04T10:06:36.137Z
Reserved: 2025-01-19T11:50:08.375Z
Link: CVE-2024-57917

No data.

Status : Analyzed
Published: 2025-01-19T12:15:25.860
Modified: 2025-10-16T20:01:27.103
Link: CVE-2024-57917


Updated: 2025-07-12T22:31:29Z