parisc: Fix and enable seccomp filter support

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The seccomp filter support requires careful handling of task registers.  This
includes reloading of the return value (%r28) and proper syscall exit if
secure_computing() returned -1.

Additionally we need to sign-extend the syscall number from signed 32bit to
signed 64bit in do_syscall_trace_enter() since the ptrace interface only allows
storing 32bit values in compat mode.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v4.5

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This commit is contained in:

Helge Deller 2016-03-30 14:14:31 +02:00

parent 4f4acc9472

commit 910cd32e55

4 changed files with 23 additions and 2 deletions

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1

arch/parisc/Kconfig

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13

arch/parisc/include/asm/syscall.h

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9

arch/parisc/kernel/ptrace.c

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2

arch/parisc/kernel/syscall.S

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