x86, ptrace: add buffer size checks

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Pass the buffer size for (most) ptrace commands that pass user-allocated buffers and check that size before accessing the buffer. Unfortunately, PTRACE_BTS_GET already uses all 4 parameters.
Commands that access user buffers return the number of bytes or records read or written.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Markus Metzger 2008-01-30 13:32:03 +01:00 • committed by Ingo Molnar

parent e6ae5d9540

commit cba4b65d35

2 changed files with 29 additions and 10 deletions

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25

arch/x86/kernel/ptrace.c

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14

include/asm-x86/ptrace-abi.h

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