Roland McGrath 6bd6aa7dda x86-64, compat: Retruncate rax after ia32 syscall entry tracing ...

commit eefdca043e upstream.

In commit d4d6715, we reopened an old hole for a 64-bit ptracer touching a
32-bit tracee in system call entry.  A %rax value set via ptrace at the
entry tracing stop gets used whole as a 32-bit syscall number, while we
only check the low 32 bits for validity.

Fix it by truncating %rax back to 32 bits after syscall_trace_enter,
in addition to testing the full 64 bits as has already been added.

Reported-by: Ben Hawkes <hawkes@sota.gen.nz>
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2010-09-20 13:17:57 -07:00

..

boot

x86: Document linker script ASSERT() quirk

2009-10-16 07:18:46 +02:00

configs

tracing: Rename FTRACE_SYSCALLS for tracepoints

2009-08-26 00:17:35 +02:00

crypto

crypto: aesni-intel - Fix irq_fpu_usable usage

2009-10-20 16:20:47 +09:00

ia32

x86-64, compat: Retruncate rax after ia32 syscall entry tracing

2010-09-20 13:17:57 -07:00

include/asm

compat: Make compat_alloc_user_space() incorporate the access_ok()

2010-09-20 13:17:57 -07:00

kernel

x86, tsc: Fix a preemption leak in restore_sched_clock_state()

2010-09-20 13:17:56 -07:00

kvm

KVM: MMU: invalidate and flush on spte small->large page size change

2010-08-02 10:21:23 -07:00

lguest

lguest: move panic notifier registration to its expected place.

2009-09-23 22:26:44 +09:30

lib

x86-64: support native xadd rwsem implementation

2010-04-26 07:41:28 -07:00

math-emu

Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

2009-03-27 17:28:43 +01:00

mm

x86: don't send SIGBUS for kernel page faults

2010-08-13 13:20:28 -07:00

oprofile

oprofile, x86: fix init_sysfs() function stub

2010-09-20 13:17:51 -07:00

pci

x86/PCI: irq and pci_ids patch for Intel Cougar Point DeviceIDs

2010-04-26 07:41:31 -07:00

power

x86, tsc, sched: Recompute cyc2ns_offset's during resume from sleep states

2010-09-20 13:17:44 -07:00

vdso

kbuild: rename ld-option to cc-ldoption

2009-09-20 12:27:42 +02:00

video

…

xen

xen: drop xen_sched_clock in favour of using plain wallclock time

2010-08-10 10:20:47 -07:00

Kbuild

x86: standardize Kbuild rules

2009-04-16 18:09:02 +02:00

Kconfig

x86, hotplug: Serialize CPU hotplug to avoid bringup concurrency issues

2010-08-26 16:41:38 -07:00

Kconfig.cpu

x86-64: support native xadd rwsem implementation

2010-04-26 07:41:28 -07:00

Kconfig.debug

kmemcheck: make kconfig accessible for other architectures

2009-06-15 15:49:17 +02:00

Makefile

x86: Remove STACKPROTECTOR_ALL

2009-10-23 16:35:23 +02:00

Makefile_32.cpu

x86: Use -maccumulate-outgoing-args for sane mcount prologues

2009-12-18 14:03:41 -08:00