Thread (8 messages) 8 messages, 2 authors, 2020-11-23

Re: [PATCH v2 1/3] remoteproc/mediatek: fix boundary check

From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: 2020-11-20 23:33:05
Also in: linux-mediatek, linux-remoteproc

On Mon, Nov 16, 2020 at 04:44:11PM +0800, Tzung-Bi Shih wrote:
quoted hunk ↗ jump to hunk
It is valid if offset+length == sram_size.

For example, sram_size=100, offset=99, length=1.  Accessing offset 99
with length 1 is valid.

Signed-off-by: Tzung-Bi Shih <redacted>
---
 drivers/remoteproc/mtk_scp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index a1e23b5f19b9..0abbeb62cf43 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -408,11 +408,11 @@ static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len)
 
 	if (da < scp->sram_size) {
 		offset = da;
-		if (offset >= 0 && (offset + len) < scp->sram_size)
+		if (offset >= 0 && (offset + len) <= scp->sram_size)
 			return (void __force *)scp->sram_base + offset;
 	} else if (scp->dram_size) {
 		offset = da - scp->dma_addr;
-		if (offset >= 0 && (offset + len) < scp->dram_size)
+		if (offset >= 0 && (offset + len) <= scp->dram_size)
Right, I had the same kind of conversation with the TI folks.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
 			return scp->cpu_addr + offset;
 	}
 
-- 
2.29.2.299.gdc1121823c-goog


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help