lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Fri, 17 Feb 2017 16:08:30 +0100
From:   Arnd Bergmann <>
To:     "David S. Miller" <>
Cc:     Shrikrishna Khare <>,
        "VMware Inc ." <>,
        Arnd Bergmann <>,,
Subject: [PATCH] vmxnet3: prevent building with 64K pages

I got a warning about broken code on ARM64 with 64K pages:

drivers/net/vmxnet3/vmxnet3_drv.c: In function 'vmxnet3_rq_init':
drivers/net/vmxnet3/vmxnet3_drv.c:1679:29: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
    rq->buf_info[0][i].len = PAGE_SIZE;

'len' here is a 16-bit integer, so this clearly won't work. I don't think
this driver is used much on anything other than x86, so there is no need
to fix this properly and we can work around it with a Kconfig dependency
to forbid known-broken configurations. qemu in theory supports it on
other architectures too, but presumably only for compatibility with x86
guests that also run on vmware.

CONFIG_PAGE_SIZE_64KB is used on hexagon, mips, sh and tile, the other
symbols are architecture-specific names for the same thing.

Signed-off-by: Arnd Bergmann <>
 drivers/net/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 4c07a067df1d..8a49fedb80ef 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -458,6 +458,9 @@ config XEN_NETDEV_BACKEND
 config VMXNET3
 	tristate "VMware VMXNET3 ethernet driver"
 	depends on PCI && INET
+	depends on !(PAGE_SIZE_64KB || ARM64_64K_PAGES || \
+		     IA64_PAGE_SIZE_64KB || MICROBLAZE_64K_PAGES || \
 	  This driver supports VMware's vmxnet3 virtual ethernet NIC.
 	  To compile this driver as a module, choose M here: the

Powered by blists - more mailing lists