Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/erdma: Fix CEQ tasklet use-after-free on removal Each CEQ interrupt handler only schedules eqc->tasklet. The tasklet calls erdma_ceq_completion_handler(), which reads the DMA-coherent EQ ring through get_next_valid_eqe() and updates eq->dbrec through notify_eq(). erdma_ceqs_uninit() frees each CEQ IRQ and then destroys its EQ. free_irq() prevents another hard IRQ and waits for an in-flight handler, but it does not drain a tasklet that the handler already scheduled. The tasklet can therefore access eq->qbuf or eq->dbrec after erdma_eq_destroy() frees them. Clearing ceq_cb->ready does not synchronize with a tasklet that already passed the check at the start of erdma_ceq_completion_handler(). Kill the tasklet after free_irq(), when no handler can schedule it again, and before erdma_ceq_uninit_one() releases the EQ buffers.
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
f2a0a630b953451a59a2612ad8c29246638f0a38 to < 0e8b78dabb1f156db05ffe74c6eae861167c7c21affectedf2a0a630b953451a59a2612ad8c29246638f0a38 to < 6e129c1310abfa786a510cc63e69c5ef12349048affectedf2a0a630b953451a59a2612ad8c29246638f0a38 to < f738c0a372d36a10dfae6dc357717c13b2aa72f4affectedf2a0a630b953451a59a2612ad8c29246638f0a38 to < a60c36d8d17f1b86705523d5eb6d290df28831e5affectedf2a0a630b953451a59a2612ad8c29246638f0a38 to < 61a25b8d333e1eb2a189881d516f8d5194e26840affectedf2a0a630b953451a59a2612ad8c29246638f0a38 to < 0ca79979384f031d710c4b3bae065dcb5d95aca3affected
Linux Linux
Default version status: affected
6.0affected0 to < 6.0unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/0e8b78dabb1f156db05ffe74c6eae861167c7c21 ↗
- https://git.kernel.org/stable/c/6e129c1310abfa786a510cc63e69c5ef12349048 ↗
- https://git.kernel.org/stable/c/f738c0a372d36a10dfae6dc357717c13b2aa72f4 ↗
- https://git.kernel.org/stable/c/a60c36d8d17f1b86705523d5eb6d290df28831e5 ↗
- https://git.kernel.org/stable/c/61a25b8d333e1eb2a189881d516f8d5194e26840 ↗
- https://git.kernel.org/stable/c/0ca79979384f031d710c4b3bae065dcb5d95aca3 ↗