Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Fix TX deadlock when using DMA `dmaengine_terminate_async` does not guarantee that the `__dma_tx_complete` callback will run. The callback is currently the only place where `dma->tx_running` gets cleared. If the transaction is canceled and the callback never runs, then `dma->tx_running` will never get cleared and we will never schedule new TX DMA transactions again. This change makes it so we clear `dma->tx_running` after we terminate the DMA transaction. This is "safe" because `serial8250_tx_dma_flush` is holding the UART port lock. The first thing the callback does is also grab the UART port lock, so access to `dma->tx_running` is serialized.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7c47e637dfadfbc691dd297b91d81ef939ca2080 before 8190f9ab6ad90cb97652adbebd238b874a4ef70d; affected bf3f395b9c37956eca866c9e1679769ed7dcce68 before 79a19bd936bb35f56ef0ccab1b3b59ebce8c762d; affected d470522c597b73e63cca04f3012aec28185113b7 before f76d91271bcacbd759a2e4ee3ea61faa6a727ccf; affected 5e00346deb7bf40a4cf70e3716ac8e9a2409eb55 before d2719a0a9c3439abf67843a5504b7afccd9ded93; affected c8a52c772c7c6de72257a435bcad03d3bb914a70 before 2a72403b985aea6b4aac3171830492f9a387f9e1; affected 9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583 before 5f6b17562f03fc65c7d3474ef8f1959b19d1ca41; affected 9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583 before b5ad887339503103d0fbe9827b16ad287597c275; affected 9e512eaaf8f4008c44ede3dfc0fbc9d9c5118583 before a424a34b8faddf97b5af41689087e7a230f79ba7; affected bbec5998d7bd349730f59c959a8b00cfff816e34; affected 59f751db7f392fa7a58cbd972205982f7f4f5854; affected 5.10.235 before 5.10.253; affected 5.15.179 before 5.15.203; affected 6.1.129 before 6.1.167; affected 6.6.79 before 6.6.130; affected 6.12.16 before 6.12.78; affected 5.4.291 before 5.5; affected 6.13.4 before 6.14 |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.167 through 6.1.*; unaffected 6.6.130 through 6.6.*; unaffected 6.12.78 through 6.12.*; unaffected 6.18.20 through 6.18.*; unaffected 6.19.10 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8190f9ab6ad90cb97652adbebd238b874a4ef70d
- https://git.kernel.org/stable/c/79a19bd936bb35f56ef0ccab1b3b59ebce8c762d
- https://git.kernel.org/stable/c/f76d91271bcacbd759a2e4ee3ea61faa6a727ccf
- https://git.kernel.org/stable/c/d2719a0a9c3439abf67843a5504b7afccd9ded93
- https://git.kernel.org/stable/c/2a72403b985aea6b4aac3171830492f9a387f9e1
- https://git.kernel.org/stable/c/5f6b17562f03fc65c7d3474ef8f1959b19d1ca41
- https://git.kernel.org/stable/c/b5ad887339503103d0fbe9827b16ad287597c275
- https://git.kernel.org/stable/c/a424a34b8faddf97b5af41689087e7a230f79ba7