Bug 2363416 (CVE-2022-49929)

Summary: CVE-2022-49929 kernel: RDMA/rxe: Fix mr leak in RESPST_ERR_RNR
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2025-05-01 15:03:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

RDMA/rxe: Fix mr leak in RESPST_ERR_RNR

rxe_recheck_mr() will increase mr's ref_cnt, so we should call rxe_put(mr)
to drop mr's ref_cnt in RESPST_ERR_RNR to avoid below warning:

  WARNING: CPU: 0 PID: 4156 at drivers/infiniband/sw/rxe/rxe_pool.c:259 __rxe_cleanup+0x1df/0x240 [rdma_rxe]
...
  Call Trace:
   rxe_dereg_mr+0x4c/0x60 [rdma_rxe]
   ib_dereg_mr_user+0xa8/0x200 [ib_core]
   ib_mr_pool_destroy+0x77/0xb0 [ib_core]
   nvme_rdma_destroy_queue_ib+0x89/0x240 [nvme_rdma]
   nvme_rdma_free_queue+0x40/0x50 [nvme_rdma]
   nvme_rdma_teardown_io_queues.part.0+0xc3/0x120 [nvme_rdma]
   nvme_rdma_error_recovery_work+0x4d/0xf0 [nvme_rdma]
   process_one_work+0x582/0xa40
   ? pwq_dec_nr_in_flight+0x100/0x100
   ? rwlock_bug.part.0+0x60/0x60
   worker_thread+0x2a9/0x700
   ? process_one_work+0xa40/0xa40
   kthread+0x168/0x1a0
   ? kthread_complete_and_exit+0x20/0x20
   ret_from_fork+0x22/0x30
Comment 1 Avinash Hanwate 2025-05-02 05:11:51 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050111-CVE-2022-49929-d572@gregkh/T