linux-kernel - [PATCH] staging: vchiq: don't leak kernel address

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Date:   Tue,  8 Oct 2019 14:33:46 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     Eric Anholt <eric@...olt.net>, Stefan Wahren <wahrenst@....net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devel@...verdev.osuosl.org
Subject: [PATCH] staging: vchiq: don't leak kernel address

Since commit ad67b74d2469d9b8 ("printk: hash addresses printed with %p"),
an obfuscated kernel pointer is printed at boot:

    vchiq: vchiq_init_state: slot_zero = (____ptrval____)

Remove the the print completely, as it's useless without the address.

Signed-off-by: Matteo Croce <mcroce@...hat.com>
---
 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
index 56a23a297fa4..084cd4b0f07c 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
@@ -2132,9 +2132,6 @@ vchiq_init_state(struct vchiq_state *state, struct vchiq_slot_zero *slot_zero)
 	char threadname[16];
 	int i;
 
-	vchiq_log_warning(vchiq_core_log_level,
-		"%s: slot_zero = %pK", __func__, slot_zero);
-
 	if (vchiq_states[0]) {
 		pr_err("%s: VCHIQ state already initialized\n", __func__);
 		return VCHIQ_ERROR;
-- 
2.21.0