From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Seth Forshee <seth.forshee@canonical.com>,
Michael Ellerman <mpe@ellerman.id.au>,
"A. Wilcox" <awilfox@adelielinux.org>
Subject: [PATCH 4.9 29/32] powerpc: Always initialize input array when calling epapr_hypercall()
Date: Mon, 4 Mar 2019 09:22:17 +0100 [thread overview]
Message-ID: <20190304081604.435424981@linuxfoundation.org> (raw)
In-Reply-To: <20190304081602.307094059@linuxfoundation.org>
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Seth Forshee <seth.forshee@canonical.com>
commit 186b8f1587c79c2fa04bfa392fdf084443e398c1 upstream.
Several callers to epapr_hypercall() pass an uninitialized stack
allocated array for the input arguments, presumably because they
have no input arguments. However this can produce errors like
this one
arch/powerpc/include/asm/epapr_hcalls.h:470:42: error: 'in' may be used uninitialized in this function [-Werror=maybe-uninitialized]
unsigned long register r3 asm("r3") = in[0];
~~^~~
Fix callers to this function to always zero-initialize the input
arguments array to prevent this.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: "A. Wilcox" <awilfox@adelielinux.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/powerpc/include/asm/epapr_hcalls.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/arch/powerpc/include/asm/epapr_hcalls.h
+++ b/arch/powerpc/include/asm/epapr_hcalls.h
@@ -508,7 +508,7 @@ static unsigned long epapr_hypercall(uns
static inline long epapr_hypercall0_1(unsigned int nr, unsigned long *r2)
{
- unsigned long in[8];
+ unsigned long in[8] = {0};
unsigned long out[8];
unsigned long r;
@@ -520,7 +520,7 @@ static inline long epapr_hypercall0_1(un
static inline long epapr_hypercall0(unsigned int nr)
{
- unsigned long in[8];
+ unsigned long in[8] = {0};
unsigned long out[8];
return epapr_hypercall(in, out, nr);
@@ -528,7 +528,7 @@ static inline long epapr_hypercall0(unsi
static inline long epapr_hypercall1(unsigned int nr, unsigned long p1)
{
- unsigned long in[8];
+ unsigned long in[8] = {0};
unsigned long out[8];
in[0] = p1;
@@ -538,7 +538,7 @@ static inline long epapr_hypercall1(unsi
static inline long epapr_hypercall2(unsigned int nr, unsigned long p1,
unsigned long p2)
{
- unsigned long in[8];
+ unsigned long in[8] = {0};
unsigned long out[8];
in[0] = p1;
@@ -549,7 +549,7 @@ static inline long epapr_hypercall2(unsi
static inline long epapr_hypercall3(unsigned int nr, unsigned long p1,
unsigned long p2, unsigned long p3)
{
- unsigned long in[8];
+ unsigned long in[8] = {0};
unsigned long out[8];
in[0] = p1;
@@ -562,7 +562,7 @@ static inline long epapr_hypercall4(unsi
unsigned long p2, unsigned long p3,
unsigned long p4)
{
- unsigned long in[8];
+ unsigned long in[8] = {0};
unsigned long out[8];
in[0] = p1;
next prev parent reply other threads:[~2019-03-04 8:47 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-04 8:21 [PATCH 4.9 00/32] 4.9.162-stable review Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 01/32] Revert "loop: Fix double mutex_unlock(&loop_ctl_mutex) in loop_control_ioctl()" Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 02/32] Revert "loop: Get rid of loop_index_mutex" Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 03/32] Revert "loop: Fold __loop_release into loop_release" Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 04/32] scsi: libsas: Fix rphy phy_identifier for PHYs with end devices attached Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 05/32] drm/msm: Unblock writer if reader closes file Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 06/32] ASoC: Intel: Haswell/Broadwell: fix setting for .dynamic field Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 07/32] ALSA: compress: prevent potential divide by zero bugs Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 08/32] thermal: int340x_thermal: Fix a NULL vs IS_ERR() check Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 09/32] usb: dwc3: gadget: synchronize_irq dwc irq in suspend Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 10/32] usb: dwc3: gadget: Fix the uninitialized link_state when udc starts Greg Kroah-Hartman
2019-03-04 8:21 ` [PATCH 4.9 11/32] usb: gadget: Potential NULL dereference on allocation error Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 12/32] ASoC: dapm: change snprintf to scnprintf for possible overflow Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 13/32] ASoC: imx-audmux: " Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 14/32] ARC: fix __ffs return value to avoid build warnings Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 15/32] drivers: thermal: int340x_thermal: Fix sysfs race condition Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 16/32] mac80211: fix miscounting of ttl-dropped frames Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 17/32] locking/rwsem: Fix (possible) missed wakeup Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 18/32] serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 19/32] direct-io: allow direct writes to empty inodes Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 20/32] scsi: csiostor: fix NULL pointer dereference in csio_vport_set_state() Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 21/32] net: altera_tse: fix connect_local_phy error path Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 22/32] net: usb: asix: ax88772_bind return error when hw_reset fail Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 23/32] ibmveth: Do not process frames after calling napi_reschedule Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 24/32] mac80211: dont initiate TDLS connection if station is not associated to AP Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 25/32] mac80211: Add attribute aligned(2) to struct action Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 26/32] cfg80211: extend range deviation for DMG Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 27/32] svm: Fix AVIC incomplete IPI emulation Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 28/32] KVM: nSVM: clear events pending from svm_complete_interrupts() when exiting to L1 Greg Kroah-Hartman
2019-03-04 8:22 ` Greg Kroah-Hartman [this message]
2019-03-04 8:22 ` [PATCH 4.9 30/32] mmc: spi: Fix card detection during probe Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 31/32] mm: enforce min addr even if capable() in expand_downwards() Greg Kroah-Hartman
2019-03-04 8:22 ` [PATCH 4.9 32/32] x86/uaccess: Dont leak the AC flag into __put_user() value evaluation Greg Kroah-Hartman
2019-03-04 14:21 ` [PATCH 4.9 00/32] 4.9.162-stable review kernelci.org bot
2019-03-04 14:48 ` Naresh Kamboju
2019-03-05 3:38 ` Guenter Roeck
2019-03-05 14:04 ` Jon Hunter
2019-03-05 16:11 ` shuah
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