Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: RDMA/nldev: Fix locking when accessing mr->pd Sashiko points out that, due to rereg_mr, the PD is actually variable and all the touches in nldev are racy. Use mr->device instead of mr->pd->device. Getting the PD restrack ID is more tricky. To avoid disturbing all the happy paths, add an rdma_restrack_sync() operation which is sort of like flush_workqueue() or synchronize_irq(): after it returns, all the old nldev touches to the mr are gone and everything sees the new PD. This makes it safe to reach into the PD pointer.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected da5c8507821573b8ed6e3f47e009f273493ffaf7 before 845c6b355226195dad1f26b300c4830f57034e8b; affected da5c8507821573b8ed6e3f47e009f273493ffaf7 before 7a0cbb5721a1da81e902d73b6049f85ca8f3fc0a; affected da5c8507821573b8ed6e3f47e009f273493ffaf7 before 05e26f34597e9c38bb5b340d86b179b23673869f; affected da5c8507821573b8ed6e3f47e009f273493ffaf7 before a07cba1296aaa81bf9b914486ca957aaff196247; affected da5c8507821573b8ed6e3f47e009f273493ffaf7 before 1a132ee4e655288d9a0937ea5109a0d038431ae9; affected da5c8507821573b8ed6e3f47e009f273493ffaf7 before 50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3 |
| Linux / Linux | affected 4.18; unaffected 0 before 4.18; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/845c6b355226195dad1f26b300c4830f57034e8b
- https://git.kernel.org/stable/c/7a0cbb5721a1da81e902d73b6049f85ca8f3fc0a
- https://git.kernel.org/stable/c/05e26f34597e9c38bb5b340d86b179b23673869f
- https://git.kernel.org/stable/c/a07cba1296aaa81bf9b914486ca957aaff196247
- https://git.kernel.org/stable/c/1a132ee4e655288d9a0937ea5109a0d038431ae9
- https://git.kernel.org/stable/c/50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3
ADP enrichment
No English description supplied.
No references supplied.