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From: Tyler Hicks <tyhicks@linux.microsoft.com>
To: Jens Wiklander <jens.wiklander@linaro.org>,
	Allen Pais <apais@linux.microsoft.com>,
	Sumit Garg <sumit.garg@linaro.org>,
	Peter Huewe <peterhuewe@gmx.de>,
	Jarkko Sakkinen <jarkko@kernel.org>,
	Jason Gunthorpe <jgg@ziepe.ca>,
	Vikas Gupta <vikas.gupta@broadcom.com>
Cc: "Thirupathaiah Annapureddy" <thiruan@microsoft.com>,
	"Pavel Tatashin" <pasha.tatashin@soleen.com>,
	"Rafał Miłecki" <zajec5@gmail.com>,
	op-tee@lists.trustedfirmware.org,
	linux-integrity@vger.kernel.org,
	bcm-kernel-feedback-list@broadcom.com,
	linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 1/8] optee: Fix memory leak when failing to register shm pages
Date: Thu, 10 Jun 2021 16:09:06 -0500	[thread overview]
Message-ID: <20210610210913.536081-2-tyhicks@linux.microsoft.com> (raw)
In-Reply-To: <20210610210913.536081-1-tyhicks@linux.microsoft.com>

Free the previously allocated pages when we encounter an error condition
while attempting to register the pages with the secure world.

Fixes: a249dd200d03 ("tee: optee: Fix dynamic shm pool allocations")
Fixes: 5a769f6ff439 ("optee: Fix multi page dynamic shm pool alloc")
Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com>
---
 drivers/tee/optee/shm_pool.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c
index d767eebf30bd..da06ce9b9313 100644
--- a/drivers/tee/optee/shm_pool.c
+++ b/drivers/tee/optee/shm_pool.c
@@ -32,8 +32,10 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
 		struct page **pages;
 
 		pages = kcalloc(nr_pages, sizeof(pages), GFP_KERNEL);
-		if (!pages)
-			return -ENOMEM;
+		if (!pages) {
+			rc = -ENOMEM;
+			goto err;
+		}
 
 		for (i = 0; i < nr_pages; i++) {
 			pages[i] = page;
@@ -44,8 +46,14 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
 		rc = optee_shm_register(shm->ctx, shm, pages, nr_pages,
 					(unsigned long)shm->kaddr);
 		kfree(pages);
+		if (rc)
+			goto err;
 	}
 
+	return 0;
+
+err:
+	__free_pages(page, order);
 	return rc;
 }
 
-- 
2.25.1


  reply	other threads:[~2021-06-10 21:09 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-10 21:09 [PATCH v4 0/8] tee: Improve support for kexec and kdump Tyler Hicks
2021-06-10 21:09 ` Tyler Hicks [this message]
2021-06-11  9:05   ` [PATCH v4 1/8] optee: Fix memory leak when failing to register shm pages Jens Wiklander
2021-06-10 21:09 ` [PATCH v4 2/8] optee: Refuse to load the driver under the kdump kernel Tyler Hicks
2021-06-11  9:08   ` Jens Wiklander
2021-06-10 21:09 ` [PATCH v4 3/8] optee: fix tee out of memory failure seen during kexec reboot Tyler Hicks
2021-06-11  9:11   ` Jens Wiklander
2021-06-11 12:53     ` Tyler Hicks
2021-06-14  7:21       ` Jens Wiklander
2021-06-14  7:22   ` Jens Wiklander
2021-06-10 21:09 ` [PATCH v4 4/8] optee: Clear stale cache entries during initialization Tyler Hicks
2021-06-14  8:27   ` Jens Wiklander
2021-06-14 19:06     ` Tyler Hicks
2021-06-14 19:15       ` Jens Wiklander
2021-06-10 21:09 ` [PATCH v4 5/8] tee: add tee_shm_alloc_kernel_buf() Tyler Hicks
2021-06-10 21:09 ` [PATCH v4 6/8] tee: Support kernel shm registration without dma-buf backing Tyler Hicks
2021-06-11  5:16   ` Sumit Garg
2021-06-11 13:09     ` Tyler Hicks
2021-06-11 13:16       ` Tyler Hicks
2021-06-12  8:19         ` Sumit Garg
2021-06-13  8:16           ` Tyler Hicks
2021-06-14  4:59             ` Sumit Garg
2021-06-10 21:09 ` [PATCH v4 7/8] tpm_ftpm_tee: Free and unregister TEE shared memory during kexec Tyler Hicks
2021-06-15 13:04   ` Jarkko Sakkinen
2021-06-10 21:09 ` [PATCH v4 8/8] firmware: tee_bnxt: Release TEE shm, session, and context " Tyler Hicks

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