Updated: 2025-02-04 15:46:55.42424
Description:
In the Linux kernel, the following vulnerability has been resolved: dma-debug: fix a possible deadlock on radix_lock radix_lock() shouldn't be held while holding dma_hash_entry[idx].lock otherwise, there's a possible deadlock scenario when dma debug API is called holding rq_lock(): CPU0 CPU1 CPU2 dma_free_attrs() check_unmap() add_dma_entry() __schedule() //out (A) rq_lock() get_hash_bucket() (A) dma_entry_hash check_sync() (A) radix_lock() (W) dma_entry_hash dma_entry_free() (W) radix_lock() // CPU2's one (W) rq_lock() CPU1 situation can happen when it extending radix tree and it tries to wake up kswapd via wake_all_kswapd(). CPU2 situation can happen while perf_event_task_sched_out() (i.e. dma sync operation is called while deleting perf_event using etm and etr tmc which are Arm Coresight hwtracing driver backends). To remove this possible situation, call dma_entry_free() after put_hash_bucket() in check_unmap().
Links | NIST | CIRCL | RHEL | Ubuntu |
Severity | Score | |
---|---|---|
CVSS Version 2.x | 0 | |
CVSS Version 3.x | MEDIUM | 5.5 |
OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
---|---|---|---|---|---|---|---|---|
AlmaLinux 9.2 ESU | kernel | 5.14.0 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:32 | ||
AlmaLinux 9.2 FIPS | kernel | 5.14.0 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:32 | ||
CentOS 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:32 | ||
CentOS 7 ELS | kernel | 3.10.0 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:31 | ||
CentOS 8.4 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:31 | ||
CentOS 8.5 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:31 | ||
CentOS Stream 8 ELS | kernel | 4.18.0 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:31 | ||
CloudLinux 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:32 | ||
CloudLinux 7 ELS | kernel | 3.10.0 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:31 | ||
Oracle Linux 6 ELS | kernel | 2.6.32 | 5.5 | MEDIUM | Ignored | 2025-02-07 06:33:31 |