Hi all,
These three copies of the same patch backport dbd4d7ca563f
("arm64: Rework valid_user_regs") to the stable kernels listed on kernel.org
as far back as v3.16.
This patch fixed a userspace triggerable oops when userspace tries
to switch to a mode not supported by the kernel:
[ 286.628508] Bad mode in Synchronous Abort handler detected, code 0x46000000 -- SVC (AArch32)
[ 286.639625] CPU: 3 PID: 2072 Comm: inter Not tainted 4.4.14 #4504
[ 286.648391] Hardware name: ARM Juno development board (r1) (DT)
[ ... ]
[ 286.716784] Bad mode in Synchronous Abort handler detected, code 0x86000007 -- IABT (current EL)
[ 286.725483] CPU: 3 PID: 2072 Comm: inter Not tainted 4.4.14 #4504
[ 286.731513] Hardware name: ARM Juno development board (r1) (DT)
[ ... ]
[ 286.840815] Internal error: Oops - bad mode: 0 [#1] PREEMPT SMP
[ 286.846673] Modules linked in:
[ 286.849699] CPU: 3 PID: 2072 Comm: inter Not tainted 4.4.14 #4504
[ 286.855728] Hardware name: ARM Juno development board (r1) (DT)
Thanks,
James
arch/arm64/include/asm/ptrace.h | 34 +++---------------
arch/arm64/kernel/ptrace.c | 80 +++++++++++++++++++++++++++++++++++++++--
arch/arm64/kernel/signal.c | 4 +--
arch/arm64/kernel/signal32.c | 2 +-
4 files changed, 86 insertions(+), 34 deletions(-)
--
2.8.0.rc3
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