In the Linux kernel, the following vulnerability has been resolved:
ftrace: Do not blindly read the ip address in ftrace_bug()
It was reported that a bug on arm64 caused a bad ip address to be used for
updating into a nop in ftrace_init(), but the error path (rightfully)
returned -EINVAL and not -EFAULT, as the bug caused more than one error to
occur. But because -EINVAL was returned, the ftrace_bug() tried to report
what was at the location of the ip address, and read it directly. This
caused the machine to panic, as the ip was not pointing to a valid memory
address.
Instead, read the ip address with copy_from_kernel_nofault() to safely
access the memory, and if it faults, report that the address faulted,
otherwise report what was in that location.
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"kernel/trace/ftrace.c"
],
"versions": [
{
"version": "05736a427f7e",
"lessThan": "0bc62e398bbd",
"status": "affected",
"versionType": "git"
},
{
"version": "05736a427f7e",
"lessThan": "4aedc2bc2b32",
"status": "affected",
"versionType": "git"
},
{
"version": "05736a427f7e",
"lessThan": "acf671ba79c1",
"status": "affected",
"versionType": "git"
},
{
"version": "05736a427f7e",
"lessThan": "862dcc14f280",
"status": "affected",
"versionType": "git"
},
{
"version": "05736a427f7e",
"lessThan": "7e4e824b109f",
"status": "affected",
"versionType": "git"
},
{
"version": "05736a427f7e",
"lessThan": "97524384762c",
"status": "affected",
"versionType": "git"
},
{
"version": "05736a427f7e",
"lessThan": "3e4ddeb68751",
"status": "affected",
"versionType": "git"
},
{
"version": "05736a427f7e",
"lessThan": "6c14133d2d3f",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"kernel/trace/ftrace.c"
],
"versions": [
{
"version": "2.6.28",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.28",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.4.273",
"lessThanOrEqual": "4.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.9.273",
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.14.237",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.19.195",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.4.126",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.44",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.12.11",
"lessThanOrEqual": "5.12.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.13",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/0bc62e398bbd9e600959e610def5109957437b28
git.kernel.org/stable/c/3e4ddeb68751fb4fb657199aed9cfd5d02796875
git.kernel.org/stable/c/4aedc2bc2b32c93555f47c95610efb89cc1ec09b
git.kernel.org/stable/c/6c14133d2d3f768e0a35128faac8aa6ed4815051
git.kernel.org/stable/c/7e4e824b109f1d41ccf223fbb0565d877d6223a2
git.kernel.org/stable/c/862dcc14f2803c556bdd73b43c27b023fafce2fb
git.kernel.org/stable/c/97524384762c1fb9b3ded931498dd2047bd0de81
git.kernel.org/stable/c/acf671ba79c1feccc3ec7cfdcffead4efcec49e7