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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2024-50280

dm cache: fix flushing uninitialized delayed_work on cache_ctr error

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 2b17026685a270b2beaf1cdd9857fcedd3505c7e to < 40fac0271c7aedf60d81ed8214e80851e5b26312affected
  • d2a0b298ebf83ab6236f66788a3541e91ce75a70 to < d154b333a5667b6c1b213a11a41ad7aaccd10c3daffected
  • 6a3e412c2ab131c54945327a7676b006f000a209 to < 5a754d3c771280f2d06bf8ab716d6a0d36ca256eaffected
  • 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa to < 8cc12dab635333c4ea28e72d7b947be7d0543c2caffected
  • 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa to < aee3ecda73ce13af7c3e556383342b57e6bd0718affected
  • 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa to < 135496c208ba26fd68cdef10b64ed7a91ac9a7ffaffected
  • 034cbc8d3b47a56acd89453c29632a9c117de09daffected
  • 993406104d2b28fe470126a062ad37a1e21e792eaffected
  • 4d20032dd90664de09f2902a7ea49ae2f7771746affected
  • 2f097dfac7579fd84ff98eb1d3acd41d53a485f3affected
  • 6ac4f36910764cb510bafc4c3768544f86ca48caaffected
  • 5.10.163 to < 5.10.237affected
  • 5.15.87 to < 5.15.181affected
  • 6.1.4 to < 6.1.117affected
  • 4.9.337 to < 4.10affected
  • 4.14.303 to < 4.15affected
  • 4.19.270 to < 4.20affected
  • 5.4.229 to < 5.5affected
  • 6.0.18 to < 6.1affected

Linux Linux

Default version status: affected

  • 6.2affected
  • 0 to < 6.2unaffected
  • 5.10.237 to ≤ 5.10.*unaffected
  • 5.15.181 to ≤ 5.15.*unaffected
  • 6.1.117 to ≤ 6.1.*unaffected
  • 6.6.61 to ≤ 6.6.*unaffected
  • 6.11.8 to ≤ 6.11.*unaffected
  • 6.12 to ≤ *unaffected

References