CVE-2025-37898 (GCVE-0-2025-37898)
Vulnerability from cvelistv5 – Published: 2025-05-20 15:21 – Updated: 2025-05-26 05:23
VLAI?
Title
powerpc64/ftrace: fix module loading without patchable function entries
Summary
In the Linux kernel, the following vulnerability has been resolved:
powerpc64/ftrace: fix module loading without patchable function entries
get_stubs_size assumes that there must always be at least one patchable
function entry, which is not always the case (modules that export data
but no code), otherwise it returns -ENOEXEC and thus the section header
sh_size is set to that value. During module_memory_alloc() the size is
passed to execmem_alloc() after being page-aligned and thus set to zero
which will cause it to fail the allocation (and thus module loading) as
__vmalloc_node_range() checks for zero-sized allocs and returns null:
[ 115.466896] module_64: cast_common: doesn't contain __patchable_function_entries.
[ 115.469189] ------------[ cut here ]------------
[ 115.469496] WARNING: CPU: 0 PID: 274 at mm/vmalloc.c:3778 __vmalloc_node_range_noprof+0x8b4/0x8f0
...
[ 115.478574] ---[ end trace 0000000000000000 ]---
[ 115.479545] execmem: unable to allocate memory
Fix this by removing the check completely, since it is anyway not
helpful to propagate this as an error upwards.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc64/ftrace: fix module loading without patchable function entries\n\nget_stubs_size assumes that there must always be at least one patchable\nfunction entry, which is not always the case (modules that export data\nbut no code), otherwise it returns -ENOEXEC and thus the section header\nsh_size is set to that value. During module_memory_alloc() the size is\npassed to execmem_alloc() after being page-aligned and thus set to zero\nwhich will cause it to fail the allocation (and thus module loading) as\n__vmalloc_node_range() checks for zero-sized allocs and returns null:\n\n[ 115.466896] module_64: cast_common: doesn\u0027t contain __patchable_function_entries.\n[ 115.469189] ------------[ cut here ]------------\n[ 115.469496] WARNING: CPU: 0 PID: 274 at mm/vmalloc.c:3778 __vmalloc_node_range_noprof+0x8b4/0x8f0\n...\n[ 115.478574] ---[ end trace 0000000000000000 ]---\n[ 115.479545] execmem: unable to allocate memory\n\nFix this by removing the check completely, since it is anyway not\nhelpful to propagate this as an error upwards."
}
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"url": "https://git.kernel.org/stable/c/358b559afec7806b9d01c2405b490e782c347022"
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{
"url": "https://git.kernel.org/stable/c/534f5a8ba27863141e29766467a3e1f61bcb47ac"
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"title": "powerpc64/ftrace: fix module loading without patchable function entries",
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"cveId": "CVE-2025-37898",
"datePublished": "2025-05-20T15:21:34.055Z",
"dateReserved": "2025-04-16T04:51:23.964Z",
"dateUpdated": "2025-05-26T05:23:17.320Z",
"state": "PUBLISHED"
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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