Commit 430f1338 authored Jul 13, 2017 by Xulin Sun Committed by Herbert Xu Jul 28, 2017

crypto: caam - free qman_fq after kill_fq



kill_fq removes a complete frame queue, it needs to free the qman_fq
in the last. Else kmemleak will report the below warning:

unreferenced object 0xffff800073085c80 (size 128):
  comm "cryptomgr_test", pid 199, jiffies 4294937850 (age 67.840s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 a0 80 7e 00 00 80 ff ff
    00 00 00 00 00 00 00 00 04 00 04 00 5c 01 00 00
  backtrace:
    [<ffff8000001e5760>] create_object+0xf8/0x258
    [<ffff800000994e38>] kmemleak_alloc+0x58/0xa0
    [<ffff8000001d5f18>] kmem_cache_alloc_trace+0x2c8/0x358
    [<ffff8000007e8410>] create_caam_req_fq+0x40/0x170
    [<ffff8000007e870c>] caam_drv_ctx_update+0x54/0x248
    [<ffff8000007fca54>] aead_setkey+0x154/0x300
    [<ffff800000452120>] setkey+0x50/0xf0
    [<ffff80000045b144>] __test_aead+0x5ec/0x1028
    [<ffff80000045c28c>] test_aead+0x44/0xc8
    [<ffff80000045c368>] alg_test_aead+0x58/0xd0
    [<ffff80000045bdb4>] alg_test+0x14c/0x308
    [<ffff8000004588e8>] cryptomgr_test+0x50/0x58
    [<ffff8000000c3b2c>] kthread+0xdc/0xf0
    [<ffff800000083c00>] ret_from_fork+0x10/0x50

And check where the function kill_fq() is called to remove
the additional kfree to qman_fq and avoid re-calling the released qman_fq.

Signed-off-by: Xulin Sun <xulin.sun@windriver.com>
Acked-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent d887c52d

drivers/crypto/caam/qi.c

+4 −6

Original line number	Diff line number	Diff line
		@@ -275,6 +275,7 @@ static int kill_fq(struct device qidev, struct qman_fq fq)
		dev_err(qidev, "OOS of FQID: %u failed\n", fq->fqid);

		qman_destroy_fq(fq);
		kfree(fq);

		return ret;
		}
		@@ -340,8 +341,7 @@ int caam_drv_ctx_update(struct caam_drv_ctx drv_ctx, u32 sh_desc)
		drv_ctx->req_fq = old_fq;

		if (kill_fq(qidev, new_fq))
		dev_warn(qidev, "New CAAM FQ: %u kill failed\n",
		new_fq->fqid);
		dev_warn(qidev, "New CAAM FQ kill failed\n");

		return ret;
		}
		@@ -371,10 +371,9 @@ int caam_drv_ctx_update(struct caam_drv_ctx drv_ctx, u32 sh_desc)
		drv_ctx->req_fq = old_fq;

		if (kill_fq(qidev, new_fq))
		dev_warn(qidev, "New CAAM FQ: %u kill failed\n",
		new_fq->fqid);
		dev_warn(qidev, "New CAAM FQ kill failed\n");
		} else if (kill_fq(qidev, old_fq)) {
		dev_warn(qidev, "Old CAAM FQ: %u kill failed\n", old_fq->fqid);
		dev_warn(qidev, "Old CAAM FQ kill failed\n");
		}

		return 0;
		@@ -508,7 +507,6 @@ int caam_qi_shutdown(struct device *qidev)

		if (kill_fq(qidev, per_cpu(pcpu_qipriv.rsp_fq, i)))
		dev_err(qidev, "Rsp FQ kill failed, cpu: %d\n", i);
		kfree(per_cpu(pcpu_qipriv.rsp_fq, i));
		}

		/*