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Message-Id: <20180411010412.18006-1-labbott@redhat.com>
Date: Tue, 10 Apr 2018 18:04:12 -0700
From: Laura Abbott <labbott@...hat.com>
To: Alex Dubov <oakad@...oo.com>,
Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Laura Abbott <labbott@...hat.com>,
linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: [PATCHv2] misc: tifm: Remove VLA
There's an ongoing effort to remove VLAs[1] from the kernel to eventually
turn on -Wvla. The single VLA can either take a value of 2 or 4 so switch
to the upper bound.
[1] https://lkml.org/lkml/2018/3/7/621
Signed-off-by: Laura Abbott <labbott@...hat.com>
---
v2: Add extra bounds check per request of Arnd
---
drivers/misc/tifm_7xx1.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
index e5f108713dd8..9ac95b48ef92 100644
--- a/drivers/misc/tifm_7xx1.c
+++ b/drivers/misc/tifm_7xx1.c
@@ -239,9 +239,13 @@ static int tifm_7xx1_resume(struct pci_dev *dev)
unsigned long timeout;
unsigned int good_sockets = 0, bad_sockets = 0;
unsigned long flags;
- unsigned char new_ids[fm->num_sockets];
+ /* Maximum number of entries is 4 */
+ unsigned char new_ids[4];
DECLARE_COMPLETION_ONSTACK(finish_resume);
+ if (WARN_ON(fm->num_sockets > ARRAY_SIZE(new_ids)))
+ return -ENXIO;
+
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
rc = pci_enable_device(dev);
--
2.14.3
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