Will Deacon 97d4477d9e arm64: ptrace: change fs when passing kernel pointer to regset code ...

commit c168870704 upstream.

Our compat PTRACE_POKEUSR implementation simply passes the user data to
regset_copy_from_user after some simple range checking. Unfortunately,
the data in question has already been copied to the kernel stack by this
point, so the subsequent access_ok check fails and the ptrace request
returns -EFAULT. This causes problems tracing fork() with older versions
of strace.

This patch briefly changes the fs to KERNEL_DS, so that the access_ok
check passes even with a kernel address.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-06-30 20:09:42 -07:00

..

vdso

arm64: vdso: fix coarse clock handling

2014-02-20 11:06:11 -08:00

.gitignore

arm64: Build infrastructure

2012-09-17 13:42:21 +01:00

arm64ksyms.c

arm64: kernel: compiling issue, need 'EXPORT_SYMBOL(clear_page)'

2013-05-24 17:31:03 +01:00

asm-offsets.c

arm64: Assembly macros and definitions

2012-09-17 10:24:44 +01:00

cputable.c

arm64: CPU support

2012-09-17 13:41:59 +01:00

debug-monitors.c

arm64: debug: clear mdscr_el1 instead of taking the OS lock

2013-05-13 11:44:56 +01:00

early_printk.c

arm64: Fix duplicate definition of early_console

2013-05-13 11:44:53 +01:00

entry-fpsimd.S

arm64: move FP-SIMD save/restore code to a macro

2012-12-05 11:26:50 +00:00

entry.S

arm64: Change kernel stack size to 16K

2014-01-09 12:24:26 -08:00

fpsimd.c

arm64: fix possible invalid FPSIMD initialization state

2014-01-09 12:24:26 -08:00

head.S

arm64: head: match all affinity levels in the pen of the secondaries

2013-03-20 18:09:42 +00:00

hw_breakpoint.c

arm64: Debugging support

2012-09-17 13:42:14 +01:00

hyp-stub.S

arm64: add hypervisor stub

2012-12-05 11:26:49 +00:00

io.c

arm64: Device specific operations

2012-09-17 13:42:04 +01:00

irq.c

arm64: Use irqchip_init() for interrupt controller initialisation

2013-03-26 16:02:23 +00:00

kuser32.S

arm64: 32-bit (compat) applications support

2012-09-17 13:42:12 +01:00

Makefile

arm64: SMP: enable PSCI boot method

2013-01-29 16:56:37 +00:00

module.c

arm64: Loadable modules

2012-09-17 13:42:19 +01:00

perf_event.c

arm64: perf: fix ARMv8 EVTYPE_MASK to include NSH bit

2013-09-26 17:18:03 -07:00

process.c

Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

2013-05-08 15:15:27 -07:00

psci.c

arm64: psci: add support for PSCI invocations from the kernel

2013-01-29 16:56:37 +00:00

ptrace.c

arm64: ptrace: change fs when passing kernel pointer to regset code

2014-06-30 20:09:42 -07:00

setup.c

arm64: Invoke the of_platform_populate() at arch_initcall() level

2013-05-14 15:44:46 +01:00

signal32.c

arm64: Removed unused variable in compat_setup_rt_frame()

2013-03-18 10:12:56 +00:00

signal.c

arm64: switch to generic sigaltstack

2013-02-14 09:17:29 -05:00

smp_psci.c

arm64: psci: Use the MPIDR values from cpu_logical_map for cpu ids.

2013-03-26 11:58:10 +00:00

smp_spin_table.c

arm64: SMP: rework the SMP code to be enabling method agnostic

2013-01-29 16:56:37 +00:00

smp.c

arm64: Only enable local interrupts after the CPU is marked online

2014-01-09 12:24:26 -08:00

stacktrace.c

ARM64: unwind: Fix PC calculation

2014-03-06 21:30:12 -08:00

sys32.S

unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE

2013-05-09 13:46:38 -04:00

sys_compat.c

compat: generic compat_sys_sched_rr_get_interval() implementation

2012-12-17 17:15:18 -08:00

sys.c

arm64: switch to generic sigaltstack

2013-02-14 09:17:29 -05:00

time.c

ARM: convert arm/arm64 arch timer to use CLKSRC_OF init

2013-04-11 15:11:15 -05:00

traps.c

arm64: don't kill the kernel on a bad esr from el0

2013-05-31 16:04:51 +01:00

vdso.c

arm64: vdso: update wtm fields for CLOCK_MONOTONIC_COARSE

2014-02-20 11:06:11 -08:00

vmlinux.lds.S

arm64: Build infrastructure

2012-09-17 13:42:21 +01:00