CVE-2025-21805

published 2025-02-27

CVE-2025-21805: In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs: Add missing deinit() call A warning is triggered when repeatedly connecting and…

Priority P4 20 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

In the Linux kernel, the following vulnerability has been resolved:

RDMA/rtrs: Add missing deinit() call

A warning is triggered when repeatedly connecting and disconnecting the
rnbd:
list_add corruption. prev->next should be next (ffff88800b13e480), but was ffff88801ecd1338. (prev=ffff88801ecd1340).
WARNING: CPU: 1 PID: 36562 at lib/list_debug.c:32 __list_add_valid_or_report+0x7f/0xa0
Workqueue: ib_cm cm_work_handler [ib_cm]
RIP: 0010:__list_add_valid_or_report+0x7f/0xa0
? __list_add_valid_or_report+0x7f/0xa0
ib_register_event_handler+0x65/0x93 [ib_core]
rtrs_srv_ib_dev_init+0x29/0x30 [rtrs_server]
rtrs_ib_dev_find_or_add+0x124/0x1d0 [rtrs_core]
__alloc_path+0x46c/0x680 [rtrs_server]
? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server]
? rcu_is_watching+0xd/0x40
? __mutex_lock+0x312/0xcf0
? get_or_create_srv+0xad/0x310 [rtrs_server]
? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server]
rtrs_rdma_connect+0x23c/0x2d0 [rtrs_server]
? __lock_release+0x1b1/0x2d0
cma_cm_event_handler+0x4a/0x1a0 [rdma_cm]
cma_ib_req_handler+0x3a0/0x7e0 [rdma_cm]
cm_process_work+0x28/0x1a0 [ib_cm]
? _raw_spin_unlock_irq+0x2f/0x50
cm_req_handler+0x618/0xa60 [ib_cm]
cm_work_handler+0x71/0x520 [ib_cm]

Commit 667db86bcbe8 ("RDMA/rtrs: Register ib event handler") introduced a
new element .deinit but never used it at all. Fix it by invoking the
`deinit()` to appropriately unregister the IB event handler.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.12.13-1 (forky)	linux 6.12.13-1 (forky)
linux	linux	—	—
linux	linux	>= 667db86bcbe82e789d82c2e8c8c40756ec2e1999 < 5a79cc9bc961fafe90787f86e8f53ba6fad8d63b	5a79cc9bc961fafe90787f86e8f53ba6fad8d63b
linux	linux	>= 667db86bcbe82e789d82c2e8c8c40756ec2e1999 < 1af2c769032b6b334cd2a867d7d8c7cbbc527b2d	1af2c769032b6b334cd2a867d7d8c7cbbc527b2d
linux	linux	>= 667db86bcbe82e789d82c2e8c8c40756ec2e1999 < 81468c4058a62e84e475433b83b3edc613294f5e	81468c4058a62e84e475433b83b3edc613294f5e
linux	linux_kernel	>= 0 < 6.12.13-1	6.12.13-1
linux	linux_kernel	>= 0 < 6.12.13-1	6.12.13-1
linux	linux_kernel	>= 6.12 < 6.12.13	6.12.13
linux	linux_kernel	>= 6.13 < 6.13.2	6.13.2

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 LOW

vendor_redhat 5.5 MEDIUM

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