In the Linux kernel, the following vulnerability has been resolved:
sched: fix warning in sched_setaffinity
Commit 8f9ea86fdf99b added some logic to sched_setaffinity that included a WARN when a per-task affinity assignment races with a cpuset update.
Specifically, we can have a race where a cpuset update results in the task affinity no longer being a subset of the cpuset. That's fine; we have a fallback to instead use the cpuset mask. However, we have a WARN set up that will trigger if the cpuset mask has no overlap at all with the requested task affinity. This shouldn't be a warning condition; its trivial to create this condition.
Reproduced the warning by the following setup:
[
{
"signature_type": "Line",
"deprecated": false,
"signature_version": "v1",
"target": {
"file": "kernel/sched/syscalls.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@70ee7947a29029736a1a06c73a48ff37674a851b",
"digest": {
"line_hashes": [
"269438371726585458466566613200989804691",
"211427408253213295809454049196111052369",
"251650129611946545747980028772462138986",
"143657221160584313264887303943947552185"
],
"threshold": 0.9
},
"id": "CVE-2024-41932-228b96f5"
},
{
"signature_type": "Function",
"deprecated": false,
"signature_version": "v1",
"target": {
"file": "kernel/sched/syscalls.c",
"function": "__sched_setaffinity"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@5c3fb75f538cfcb886f6dfeb497d99fc2f263ee6",
"digest": {
"length": 904.0,
"function_hash": "112208079082531714983477888314016571832"
},
"id": "CVE-2024-41932-5c98f8f8"
},
{
"signature_type": "Line",
"deprecated": false,
"signature_version": "v1",
"target": {
"file": "kernel/sched/syscalls.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@5c3fb75f538cfcb886f6dfeb497d99fc2f263ee6",
"digest": {
"line_hashes": [
"269438371726585458466566613200989804691",
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"251650129611946545747980028772462138986",
"143657221160584313264887303943947552185"
],
"threshold": 0.9
},
"id": "CVE-2024-41932-73d8c54b"
},
{
"signature_type": "Function",
"deprecated": false,
"signature_version": "v1",
"target": {
"file": "kernel/sched/syscalls.c",
"function": "__sched_setaffinity"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@70ee7947a29029736a1a06c73a48ff37674a851b",
"digest": {
"length": 904.0,
"function_hash": "112208079082531714983477888314016571832"
},
"id": "CVE-2024-41932-a589a858"
}
]