Paul Moore 8b4b9f27e5 x86: remove the x32 syscall bitmask from syscall_get_nr() ... Commit fca460f95e simplified the x32 implementation by creating a syscall bitmask, equal to 0x40000000, that could be applied to x32 syscalls such that the masked syscall number would be the same as a x86_64 syscall. While that patch was a nice way to simplify the code, it went a bit too far by adding the mask to syscall_get_nr(); returning the masked syscall numbers can cause confusion with callers that expect syscall numbers matching the x32 ABI, e.g. unmasked syscall numbers. This patch fixes this by simply removing the mask from syscall_get_nr() while preserving the other changes from the original commit. While there are several syscall_get_nr() callers in the kernel, most simply check that the syscall number is greater than zero, in this case this patch will have no effect. Of those remaining callers, they appear to be few, seccomp and ftrace, and from my testing of seccomp without this patch the original commit definitely breaks things; the seccomp filter does not correctly filter the syscalls due to the difference in syscall numbers in the BPF filter and the value from syscall_get_nr(). Applying this patch restores the seccomp BPF filter functionality on x32. I've tested this patch with the seccomp BPF filters as well as ftrace and everything looks reasonable to me; needless to say general usage seemed fine as well. Signed-off-by: Paul Moore <pmoore@redhat.com> Link: http://lkml.kernel.org/r/20130215172143.12549.10292.stgit@localhost Cc: <stable@vger.kernel.org> Cc: Will Drewry <wad@chromium.org> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>		2013-04-02 14:38:09 -07:00
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boot	Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-02-27 16:17:42 -08:00
configs	x86: Default to ARCH=x86 to avoid overriding CONFIG_64BIT	2012-12-20 14:37:18 -08:00
crypto	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2013-02-25 15:56:15 -08:00
ia32	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2013-03-02 08:34:06 -08:00
include	x86: remove the x32 syscall bitmask from syscall_get_nr()	2013-04-02 14:38:09 -07:00
kernel	Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-03-24 10:10:34 -07:00
kvm	KVM: x86: Convert MSR_KVM_SYSTEM_TIME to use gfn_to_hva_cache functions (CVE-2013-1797)	2013-03-19 14:17:35 -03:00
lguest	Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-02-21 18:06:55 -08:00
lib	x86-64: Fix the failure case in copy_user_handle_tail()	2013-03-18 11:32:03 -07:00
math-emu
mm	x86: Do not try to sync identity map for non-mapped pages	2013-03-07 13:23:28 -08:00
net	x86: bpf_jit_comp: add pkt_type support	2013-01-30 22:38:34 -05:00
oprofile	oprofile, x86: Fix wrapping bug in op_x86_get_ctrl()	2012-10-15 14:38:24 +02:00
pci	Bug-fixes:	2013-03-03 14:22:53 -08:00
platform	Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-02-27 16:17:42 -08:00
power	perf,x86: fix kernel crash with PEBS/BTS after suspend/resume	2013-03-15 09:26:35 -07:00
realmode	Merge remote-tracking branch 'origin/x86/mm' into x86/mm2	2013-02-01 02:28:36 -08:00
syscalls	fix compat truncate/ftruncate	2013-02-25 09:24:55 -05:00
tools	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-02-05 07:57:09 +11:00
um	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2013-02-23 18:50:11 -08:00
vdso	timers/x86/hpet: Use HPET_COUNTER to specify the hpet counter in vread_hpet()	2013-02-15 12:13:18 +01:00
video
xen	xen/mmu: Move the setting of pvops.write_cr3 to later phase in bootup.	2013-03-27 12:06:03 -04:00
.gitignore
Kbuild
Kconfig	Select VIRT_TO_BUS directly where needed	2013-03-12 11:16:40 -07:00
Kconfig.cpu	x86, 386 removal: Document Nx586 as a 386 and thus unsupported	2012-11-29 13:28:39 -08:00
Kconfig.debug
Makefile	Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-02-19 19:12:03 -08:00
Makefile_32.cpu	x86, 386 removal: Remove CONFIG_M386 from Kconfig	2012-11-29 13:23:01 -08:00
Makefile.um