In the Linux kernel, the following vulnerability has been resolved:
dm cache: fix flushing uninitialized delayed_work on cache_ctr error
An unexpected WARN_ON from flush_work() may occur when cache creation
fails, caused by destroying the uninitialized delayed_work waker in the
error path of cache_create(). For example, the warning appears on the
superblock checksum error.
Reproduce steps:
dmsetup create cmeta --table "0 8192 linear /dev/sdc 0"
dmsetup create cdata --table "0 65536 linear /dev/sdc 8192"
dmsetup create corig --table "0 524288 linear /dev/sdc 262144"
dd if=/dev/urandom of=/dev/mapper/cmeta bs=4k count=1 oflag=direct
dmsetup create cache --table "0 524288 cache /dev/mapper/cmeta \
/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0"
Kernel logs:
(snip)
WARNING: CPU: 0 PID: 84 at kernel/workqueue.c:4178 __flush_work+0x5d4/0x890
Fix by pulling out the cancel_delayed_work_sync() from the constructor's
error path. This patch doesn't affect the use-after-free fix for
concurrent dm_resume and dm_destroy (commit 6a459d8edbdb ("dm cache: Fix
UAF in destroy()")) as cache_dtr is not changed.
Metrics
Affected Vendors & Products
References
History
Wed, 11 Dec 2024 15:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | CWE-416 | |
Metrics |
cvssV3_1
|
ssvc
|
Fri, 22 Nov 2024 14:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | CWE-667 | |
References |
| |
Metrics |
threat_severity
|
cvssV3_1
|
Tue, 19 Nov 2024 01:45:00 +0000
Type | Values Removed | Values Added |
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Description | In the Linux kernel, the following vulnerability has been resolved: dm cache: fix flushing uninitialized delayed_work on cache_ctr error An unexpected WARN_ON from flush_work() may occur when cache creation fails, caused by destroying the uninitialized delayed_work waker in the error path of cache_create(). For example, the warning appears on the superblock checksum error. Reproduce steps: dmsetup create cmeta --table "0 8192 linear /dev/sdc 0" dmsetup create cdata --table "0 65536 linear /dev/sdc 8192" dmsetup create corig --table "0 524288 linear /dev/sdc 262144" dd if=/dev/urandom of=/dev/mapper/cmeta bs=4k count=1 oflag=direct dmsetup create cache --table "0 524288 cache /dev/mapper/cmeta \ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0" Kernel logs: (snip) WARNING: CPU: 0 PID: 84 at kernel/workqueue.c:4178 __flush_work+0x5d4/0x890 Fix by pulling out the cancel_delayed_work_sync() from the constructor's error path. This patch doesn't affect the use-after-free fix for concurrent dm_resume and dm_destroy (commit 6a459d8edbdb ("dm cache: Fix UAF in destroy()")) as cache_dtr is not changed. | |
Title | dm cache: fix flushing uninitialized delayed_work on cache_ctr error | |
References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-11-19T01:30:21.999Z
Updated: 2024-12-19T09:37:12.375Z
Reserved: 2024-10-21T19:36:19.983Z
Link: CVE-2024-50280
Vulnrichment
Updated: 2024-12-11T14:25:28.964Z
NVD
Status : Awaiting Analysis
Published: 2024-11-19T02:16:30.303
Modified: 2024-12-11T15:15:14.733
Link: CVE-2024-50280
Redhat