Description
In the Linux kernel, the following vulnerability has been resolved: rds: ib: use rds_conn_drop() on protocol version mismatch rds_ib_cm_connect_complete() runs from the RDMA-CM event handler with conn->c_cm_lock held. When the peer negotiates a protocol version older than RDS_PROTOCOL_COMPAT_VERSION, the handler calls rds_conn_destroy(), which is only safe in the rmmod path: it synchronously tears the connection down and flush_work()es the shutdown work cp_down_w. That shutdown work (rds_conn_shutdown()) needs cp_cm_lock, which is the very lock the event handler still holds, so the flush never completes: the two workers wait on each other and the RDS connection workqueues stall for good. All other RDMA-CM failure paths (REJECTED, CONNECT_ERROR, DISCONNECTED) use rds_conn_drop(), which marks the connection RDS_CONN_ERROR and schedules the shutdown work asynchronously. Use it here as well.
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
f147dd9ecabf23fd63d2562ffe64252a0453ecde to < 424019be3f637da76b74f44a40034669acbb166faffectedf147dd9ecabf23fd63d2562ffe64252a0453ecde to < 14fb90067d13f4494cff0f03243fae3cf2911cbcaffectedf147dd9ecabf23fd63d2562ffe64252a0453ecde to < 344c72a0bc2703a6de4918ed935850e07dae3af2affectedf147dd9ecabf23fd63d2562ffe64252a0453ecde to < b5c9f2951d330d4a198a64d6e60f79b4bd6ef078affectedf147dd9ecabf23fd63d2562ffe64252a0453ecde to < d392b16acd0908f077289aad8bba066ff16de336affectedf147dd9ecabf23fd63d2562ffe64252a0453ecde to < 65ca0a5037152a5a80b8fe6aac80eb80458be573affectedf147dd9ecabf23fd63d2562ffe64252a0453ecde to < 7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8affectedf147dd9ecabf23fd63d2562ffe64252a0453ecde to < f97d8c7bab7843631206a114986c9059da03efebaffected
Linux Linux
Default version status: affected
2.6.37affected0 to < 2.6.37unaffected5.10.271 to ≤ 5.10.*unaffected5.15.222 to ≤ 5.15.*unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.112 to ≤ 6.12.*unaffected6.18.54 to ≤ 6.18.*unaffected7.2.8 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/424019be3f637da76b74f44a40034669acbb166f ↗
- https://git.kernel.org/stable/c/14fb90067d13f4494cff0f03243fae3cf2911cbc ↗
- https://git.kernel.org/stable/c/344c72a0bc2703a6de4918ed935850e07dae3af2 ↗
- https://git.kernel.org/stable/c/b5c9f2951d330d4a198a64d6e60f79b4bd6ef078 ↗
- https://git.kernel.org/stable/c/d392b16acd0908f077289aad8bba066ff16de336 ↗
- https://git.kernel.org/stable/c/65ca0a5037152a5a80b8fe6aac80eb80458be573 ↗
- https://git.kernel.org/stable/c/7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8 ↗
- https://git.kernel.org/stable/c/f97d8c7bab7843631206a114986c9059da03efeb ↗