linux-kernel - [PATCH resend] drivers: dma-buf: Change %p to %pK in debug messages

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Date:   Tue,  5 Jun 2018 16:40:41 -0700
From:   Daniel Rosenberg <drosen@...gle.com>
To:     Sumit Semwal <sumit.semwal@...aro.org>,
        linux-kernel@...r.kernel.org
Cc:     Gustavo Padovan <gustavo@...ovan.org>, linux-media@...r.kernel.org,
        linaro-mm-sig@...ts.linaro.org, dri-devel@...ts.freedesktop.org,
        kernel-team@...roid.com, Daniel Rosenberg <drosen@...gle.com>,
        Divya Ponnusamy <pdivya@...eaurora.org>,
        stable <stable@...r.kernel.org>
Subject: [PATCH resend] drivers: dma-buf: Change %p to %pK in debug messages

The format specifier %p can leak kernel addresses
while not valuing the kptr_restrict system settings.
Use %pK instead of %p, which also evaluates whether
kptr_restrict is set.

Signed-off-by: Divya Ponnusamy <pdivya@...eaurora.org>
Signed-off-by: Daniel Rosenberg <drosen@...gle.com>
Cc: stable <stable@...r.kernel.org>
---
 drivers/dma-buf/sync_debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma-buf/sync_debug.c b/drivers/dma-buf/sync_debug.c
index c4c8ecb24aa9..d8d340542a79 100644
--- a/drivers/dma-buf/sync_debug.c
+++ b/drivers/dma-buf/sync_debug.c
@@ -133,7 +133,7 @@ static void sync_print_sync_file(struct seq_file *s,
 	char buf[128];
 	int i;
 
-	seq_printf(s, "[%p] %s: %s\n", sync_file,
+	seq_printf(s, "[%pK] %s: %s\n", sync_file,
 		   sync_file_get_name(sync_file, buf, sizeof(buf)),
 		   sync_status_str(dma_fence_get_status(sync_file->fence)));
 
-- 
2.17.0.441.gb46fe60e1d-goog