In the Linux kernel, the following vulnerability has been resolved:
rcu: Fix buffer overflow in print_cpu_stall_info()
The rcuc-starvation output from print_cpu_stall_info() might overflow the
buffer if there is a huge difference in jiffies difference. The situation
might seem improbable, but computers sometimes get very confused about
time, which can result in full-sized integers, and, in this case,
buffer overflow.
Also, the unsigned jiffies difference is printed using %ld, which is
normally for signed integers. This is intentional for debugging purposes,
but it is not obvious from the code.
This commit therefore changes sprintf() to snprintf() and adds a
clarifying comment about intention of %ld format.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"kernel/rcu/tree_stall.h"
],
"versions": [
{
"version": "245a62982502",
"lessThan": "e2228ed3fe7a",
"status": "affected",
"versionType": "git"
},
{
"version": "245a62982502",
"lessThan": "afb39909bfb5",
"status": "affected",
"versionType": "git"
},
{
"version": "245a62982502",
"lessThan": "9351e1338539",
"status": "affected",
"versionType": "git"
},
{
"version": "245a62982502",
"lessThan": "4c3e2ef4d8dd",
"status": "affected",
"versionType": "git"
},
{
"version": "245a62982502",
"lessThan": "3758f7d9917b",
"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/rcu/tree_stall.h"
],
"versions": [
{
"version": "6.0",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.0",
"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",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/3758f7d9917bd7ef0482c4184c0ad673b4c4e069
git.kernel.org/stable/c/4c3e2ef4d8ddd313c8ce3ac30505940bea8d6257
git.kernel.org/stable/c/9351e1338539cb7f319ffc1210fa9b2aa27384b5
git.kernel.org/stable/c/afb39909bfb5c08111f99e21bf5be7505f59ff1c
git.kernel.org/stable/c/e2228ed3fe7aa838fba87c79a76fb1ad9ea47138