In the Linux kernel, the following vulnerability has been resolved:
ext4: fix infinite loop when replaying fast_commit
When doing fast_commit replay an infinite loop may occur due to an
uninitialized extent_status struct. ext4_ext_determine_insert_hole() does
not detect the replay and calls ext4_es_find_extent_range(), which will
return immediately without initializing the ‘es’ variable.
Because ‘es’ contains garbage, an integer overflow may happen causing an
infinite loop in this function, easily reproducible using fstest generic/039.
This commit fixes this issue by unconditionally initializing the structure
in function ext4_es_find_extent_range().
Thanks to Zhang Yi, for figuring out the real problem!
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/ext4/extents_status.c"
],
"versions": [
{
"version": "8016e29f4362",
"lessThan": "5ed0496e383c",
"status": "affected",
"versionType": "git"
},
{
"version": "8016e29f4362",
"lessThan": "0619f7750f2b",
"status": "affected",
"versionType": "git"
},
{
"version": "8016e29f4362",
"lessThan": "181e63cd595c",
"status": "affected",
"versionType": "git"
},
{
"version": "8016e29f4362",
"lessThan": "c6e67df64783",
"status": "affected",
"versionType": "git"
},
{
"version": "8016e29f4362",
"lessThan": "81f819c537d2",
"status": "affected",
"versionType": "git"
},
{
"version": "8016e29f4362",
"lessThan": "907c3fe53225",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/ext4/extents_status.c"
],
"versions": [
{
"version": "5.10",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.10",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.224",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.165",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.103",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.44",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.10.3",
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.11",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/0619f7750f2b178a1309808832ab20d85e0ad121
git.kernel.org/stable/c/181e63cd595c688194e07332f9944b3a63193de2
git.kernel.org/stable/c/5ed0496e383cb6de120e56991385dce70bbb87c1
git.kernel.org/stable/c/81f819c537d29932e4b9267f02411cbc8b355178
git.kernel.org/stable/c/907c3fe532253a6ef4eb9c4d67efb71fab58c706
git.kernel.org/stable/c/c6e67df64783e99a657ef2b8c834ba2bf54c539c