RDMA/rxe: Fix the qp flush warnings in req

JIRA: https://issues.redhat.com/browse/RHEL-72373
CVE: CVE-2024-53229

commit ea4c990
Author: Zhu Yanjun <[email protected]>
Date:   Fri Oct 25 17:20:36 2024 +0200

    RDMA/rxe: Fix the qp flush warnings in req

    When the qp is in error state, the status of WQEs in the queue should be
    set to error. Or else the following will appear.

    [  920.617269] WARNING: CPU: 1 PID: 21 at drivers/infiniband/sw/rxe/rxe_comp.c:756 rxe_completer+0x989/0xcc0 [rdma_rxe]
    [  920.617744] Modules linked in: rnbd_client(O) rtrs_client(O) rtrs_core(O) rdma_ucm rdma_cm iw_cm ib_cm crc32_generic rdma_rxe ip6_udp_tunnel udp_tunnel ib_uverbs ib_core loop brd null_blk ipv6
    [  920.618516] CPU: 1 PID: 21 Comm: ksoftirqd/1 Tainted: G           O       6.1.113-storage+ #65
    [  920.618986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
    [  920.619396] RIP: 0010:rxe_completer+0x989/0xcc0 [rdma_rxe]
    [  920.619658] Code: 0f b6 84 24 3a 02 00 00 41 89 84 24 44 04 00 00 e9 2a f7 ff ff 39 ca bb 03 00 00 00 b8 0e 00 00 00 48 0f 45 d8 e9 15 f7 ff ff <0f> 0b e9 cb f8 ff ff 41 bf f5 ff ff ff e9 08 f8 ff ff 49 8d bc 24
    [  920.620482] RSP: 0018:ffff97b7c00bbc38 EFLAGS: 00010246
    [  920.620817] RAX: 0000000000000000 RBX: 000000000000000c RCX: 0000000000000008
    [  920.621183] RDX: ffff960dc396ebc0 RSI: 0000000000005400 RDI: ffff960dc4e2fbac
    [  920.621548] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffffac406450
    [  920.621884] R10: ffffffffac4060c0 R11: 0000000000000001 R12: ffff960dc4e2f800
    [  920.622254] R13: ffff960dc4e2f928 R14: ffff97b7c029c580 R15: 0000000000000000
    [  920.622609] FS:  0000000000000000(0000) GS:ffff960ef7d00000(0000) knlGS:0000000000000000
    [  920.622979] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [  920.623245] CR2: 00007fa056965e90 CR3: 00000001107f1000 CR4: 00000000000006e0
    [  920.623680] Call Trace:
    [  920.623815]  <TASK>
    [  920.623933]  ? __warn+0x79/0xc0
    [  920.624116]  ? rxe_completer+0x989/0xcc0 [rdma_rxe]
    [  920.624356]  ? report_bug+0xfb/0x150
    [  920.624594]  ? handle_bug+0x3c/0x60
    [  920.624796]  ? exc_invalid_op+0x14/0x70
    [  920.624976]  ? asm_exc_invalid_op+0x16/0x20
    [  920.625203]  ? rxe_completer+0x989/0xcc0 [rdma_rxe]
    [  920.625474]  ? rxe_completer+0x329/0xcc0 [rdma_rxe]
    [  920.625749]  rxe_do_task+0x80/0x110 [rdma_rxe]
    [  920.626037]  rxe_requester+0x625/0xde0 [rdma_rxe]
    [  920.626310]  ? rxe_cq_post+0xe2/0x180 [rdma_rxe]
    [  920.626583]  ? do_complete+0x18d/0x220 [rdma_rxe]
    [  920.626812]  ? rxe_completer+0x1a3/0xcc0 [rdma_rxe]
    [  920.627050]  rxe_do_task+0x80/0x110 [rdma_rxe]
    [  920.627285]  tasklet_action_common.constprop.0+0xa4/0x120
    [  920.627522]  handle_softirqs+0xc2/0x250
    [  920.627728]  ? sort_range+0x20/0x20
    [  920.627942]  run_ksoftirqd+0x1f/0x30
    [  920.628158]  smpboot_thread_fn+0xc7/0x1b0
    [  920.628334]  kthread+0xd6/0x100
    [  920.628504]  ? kthread_complete_and_exit+0x20/0x20
    [  920.628709]  ret_from_fork+0x1f/0x30
    [  920.628892]  </TASK>

    Fixes: ae720bd ("RDMA/rxe: Generate error completion for error requester QP state")
    Signed-off-by: Zhu Yanjun <[email protected]>
    Link: https://patch.msgid.link/[email protected]
    Signed-off-by: Leon Romanovsky <[email protected]>

Signed-off-by: CKI Backport Bot <[email protected]>

Author: CKI Backport Bot

drivers/infiniband/sw/rxe/rxe_req.c

@@ -692,10 +692,12 @@ int rxe_requester(struct rxe_qp *qp)
 	if (unlikely(qp_state(qp) == IB_QPS_ERR)) {
 		wqe = __req_next_wqe(qp);
 		spin_unlock_irqrestore(&qp->state_lock, flags);
-		if (wqe)
+		if (wqe) {
+			wqe->status = IB_WC_WR_FLUSH_ERR;
 			goto err;
-		else
+		} else {
 			goto exit;
+		}
 	}
 
 	if (unlikely(qp_state(qp) == IB_QPS_RESET)) {