Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: md raid: fix hang when stopping arrays with metadata through dm-raid When using device-mapper's dm-raid target, stopping a RAID array can cause the system to hang under specific conditions. This occurs when: - A dm-raid managed device tree is suspended from top to bottom (the top-level RAID device is suspended first, followed by its underlying metadata and data devices) - The top-level RAID device is then removed Removing the top-level device triggers a hang in the following sequence: the dm-raid destructor calls md_stop(), which tries to flush the write-intent bitmap by writing to the metadata sub-devices. However, these devices are already suspended, making them unable to complete the write-intent operations and causing an indefinite block. Fix: - Prevent bitmap flushing when md_stop() is called from dm-raid destructor context and avoid a quiescing/unquescing cycle which could also cause I/O - Still allow write-intent bitmap flushing when called from dm-raid suspend context This ensures that RAID array teardown can complete successfully even when the underlying devices are in a suspended state. This second patch uses md_is_rdwr() to distinguish between suspend and destructor paths as elaborated on above.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0dd84b319352bb8ba64752d4e45396d8b13e6018 before 63054027d95200b04f3cf624faa7817e0555d56a; affected 0dd84b319352bb8ba64752d4e45396d8b13e6018 before 24783dd06de870d646c25207bae186f78195f912; affected 0dd84b319352bb8ba64752d4e45396d8b13e6018 before 338378dfffbdbb8d37a18f0a0c0358812671f91e; affected 0dd84b319352bb8ba64752d4e45396d8b13e6018 before cefcb9297fbdb6d94b61787b4f8d84f55b741470; affected 1678ca35b80a94d474fdc31e2497ce5d7ed52512; affected 690b5c90fd2d81fd1d2b6110fa36783232f6dce2; affected 8e7fb19f1a744fd34e982633ced756fee0498ef7; affected a5a58fab556bfe618b4c9719eb85712d78c6cb10; affected 661c01b2181d9413c799127f13143583b69f20fd; affected f42a9819ba84bed2e609a4dff56af37063dcabdc; affected 4.14.292 before 4.15; affected 4.19.257 before 4.20; affected 5.4.212 before 5.5; affected 5.10.140 before 5.11; affected 5.15.64 before 5.16; affected 5.19.6 before 5.20 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.12.114 through 6.12.*; unaffected 6.18.16 through 6.18.*; unaffected 6.19.6 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.