In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix use-after-free of timer for log writer thread
Patch series “nilfs2: fix log writer related issues”.
This bug fix series covers three nilfs2 log writer-related issues,
including a timer use-after-free issue and potential deadlock issue on
unmount, and a potential freeze issue in event synchronization found
during their analysis. Details are described in each commit log.
This patch (of 3):
A use-after-free issue has been reported regarding the timer sc_timer on
the nilfs_sc_info structure.
The problem is that even though it is used to wake up a sleeping log
writer thread, sc_timer is not shut down until the nilfs_sc_info structure
is about to be freed, and is used regardless of the thread’s lifetime.
Fix this issue by limiting the use of sc_timer only while the log writer
thread is alive.
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/nilfs2/segment.c"
],
"versions": [
{
"version": "fdce895ea5dd",
"lessThan": "822ae5a8eac3",
"status": "affected",
"versionType": "git"
},
{
"version": "fdce895ea5dd",
"lessThan": "82933c84f188",
"status": "affected",
"versionType": "git"
},
{
"version": "fdce895ea5dd",
"lessThan": "67fa90d4a2cc",
"status": "affected",
"versionType": "git"
},
{
"version": "fdce895ea5dd",
"lessThan": "e65ccf3a4de4",
"status": "affected",
"versionType": "git"
},
{
"version": "fdce895ea5dd",
"lessThan": "86a30d6302de",
"status": "affected",
"versionType": "git"
},
{
"version": "fdce895ea5dd",
"lessThan": "f9186bba4ea2",
"status": "affected",
"versionType": "git"
},
{
"version": "fdce895ea5dd",
"lessThan": "2f12b2c03c5d",
"status": "affected",
"versionType": "git"
},
{
"version": "fdce895ea5dd",
"lessThan": "68e738be5c51",
"status": "affected",
"versionType": "git"
},
{
"version": "fdce895ea5dd",
"lessThan": "f5d4e04634c9",
"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/nilfs2/segment.c"
],
"versions": [
{
"version": "2.6.35",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.35",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.19.316",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.4.278",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.219",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.161",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.94",
"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/2f12b2c03c5dae1a0de0a9e5853177e3d6eee3c6
git.kernel.org/stable/c/67fa90d4a2ccd9ebb0e1e168c7d0b5d0cf3c7148
git.kernel.org/stable/c/68e738be5c518fc3c4e9146b66f67c8fee0135fb
git.kernel.org/stable/c/822ae5a8eac30478578a75f7e064f0584931bf2d
git.kernel.org/stable/c/82933c84f188dcfe89eb26b0b48ab5d1ca99d164
git.kernel.org/stable/c/86a30d6302deddb9fb97ba6fc4b04d0e870b582a
git.kernel.org/stable/c/e65ccf3a4de4f0c763d94789615b83e11f204438
git.kernel.org/stable/c/f5d4e04634c9cf68bdf23de08ada0bb92e8befe7
git.kernel.org/stable/c/f9186bba4ea282b07293c1c892441df3a5441cb0