Linus Torvalds 12e993b894 x86-32: fix up strncpy_from_user() sign error ... The 'max' range needs to be unsigned, since the size of the user address space is bigger than 2GB. We know that 'count' is positive in 'long' (that is checked in the caller), so we will truncate 'max' down to something that fits in a signed long, but before we actually do that, that comparison needs to be done in unsigned. Bug introduced in commit 92ae03f2ef ("x86: merge 32/64-bit versions of 'strncpy_from_user()' and speed it up"). On x86-64 you can't trigger this, since the user address space is much smaller than 63 bits, and on x86-32 it works in practice, since you would seldom hit the strncpy limits anyway. I had actually tested the corner-cases, I had only tested them on x86-64. Besides, I had only worried about the case of a pointer *close* to the end of the address space, rather than really far away from it ;) This also changes the "we hit the user-specified maximum" to return 'res', for the trivial reason that gcc seems to generate better code that way. 'res' and 'count' are the same in that case, so it really doesn't matter which one we return. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-04-15 17:23:00 -07:00
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boot
configs
crypto
ia32
include/asm	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-04-12 15:06:07 -07:00
kernel	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-04-12 15:06:07 -07:00
kvm	KVM: VMX: vmx_set_cr0 expects kvm->srcu locked	2012-04-05 19:04:09 +03:00
lguest
lib	x86-32: fix up strncpy_from_user() sign error	2012-04-15 17:23:00 -07:00
math-emu
mm
net	bpf jit: Let the x86 jit handle negative offsets	2012-04-03 18:01:41 -04:00
oprofile
pci
platform
power
syscalls
tools
um	um: Use asm-generic/switch_to.h	2012-04-10 00:13:45 +02:00
vdso
video
xen	Two fixes for regressions:	2012-04-06 17:54:53 -07:00
.gitignore
Kbuild
Kconfig
Kconfig.cpu
Kconfig.debug
Makefile
Makefile_32.cpu
Makefile.um	um: fix linker script generation	2012-04-09 13:59:00 -04:00