In the Linux kernel, the following vulnerability has been resolved:
lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure
The kcalloc() in dmirror_device_evict_chunk() will return null if the
physical memory has run out. As a result, if src_pfns or dst_pfns is
dereferenced, the null pointer dereference bug will happen.
Moreover, the device is going away. If the kcalloc() fails, the pages
mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in
kcalloc().
Finally, as there is no need to have physically contiguous memory, Switch
kcalloc() to kvcalloc() in order to avoid failing allocations.
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"lib/test_hmm.c"
],
"versions": [
{
"version": "b2ef9f5a5cb3",
"lessThan": "1a21fdeea502",
"status": "affected",
"versionType": "git"
},
{
"version": "b2ef9f5a5cb3",
"lessThan": "65e528a69cb3",
"status": "affected",
"versionType": "git"
},
{
"version": "b2ef9f5a5cb3",
"lessThan": "ce47e8ead9a7",
"status": "affected",
"versionType": "git"
},
{
"version": "b2ef9f5a5cb3",
"lessThan": "3b20d18f475b",
"status": "affected",
"versionType": "git"
},
{
"version": "b2ef9f5a5cb3",
"lessThan": "c2af060d1c18",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"lib/test_hmm.c"
],
"versions": [
{
"version": "5.8",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.8",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.93",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.33",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.8.12",
"lessThanOrEqual": "6.8.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.9.3",
"lessThanOrEqual": "6.9.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.10-rc1",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64
git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc
git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33
git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3
git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7