Package: rng-tools Version: 2-unofficial-mt.13-3 Severity: important According to a commit in LKML:
It has been reported that on at least one Nano CPU the xstore
instruction will write as many as 16 bytes of data to the output
buffer.
This causes memory corruption as we use rng->priv which is only
4-8 bytes long.
This patch fixes this by using an intermediate buffer on the stack
with at least 16 bytes and aligned to a 16-byte boundary.
The problem was observed on the following processor:
processor : 0
vendor_id : CentaurHauls
cpu family : 6
model : 15
model name : VIA Nano processor U2250 (1.6GHz Capable)
stepping : 3
cpu MHz : 1600.000
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep
mtrr pge mca cmov pat clflush acpi mmx fxsr sse sse2 ss tm syscall nx lm
constant_tsc
+up rep_good pni monitor vmx est tm2 ssse3 cx16 xtpr rng rng_en ace
ace_en ace2 phe phe_en lahf_lm
bogomips : 3192.08
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
Tested-by: Mario 'BitKoenig' Holbe <mario.ho...@tu-ilmenau.de>
Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
We need to do the same: use a static buffer 16-byte aligned, at least
16-bytes wide (better make it 128 bytes if VIA is going to have
extremely dangerous CPU bugs like this...)
-- System Information:
Debian Release: 6.0
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32.27 (SMP w/8 CPU cores)
Locale: LANG=pt_BR.UTF-8, LC_CTYPE=pt_BR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages rng-tools depends on:
ii libc6 2.11.2-7 Embedded GNU C Library: Shared lib
ii makedev 2.3.1-89 creates device files in /dev
ii udev 164-3 /dev/ and hotplug management daemo
rng-tools recommends no packages.
rng-tools suggests no packages.
-- Configuration Files:
/etc/init.d/rng-tools changed [not included]
/etc/logcheck/ignore.d.server/rng-tools [Errno 13] Permission denied:
u'/etc/logcheck/ignore.d.server/rng-tools'
/etc/logcheck/violations.ignore.d/rng-tools [Errno 13] Permission denied:
u'/etc/logcheck/violations.ignore.d/rng-tools'
-- no debconf information
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