whiterose

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commit ebbd30004d6cfa747723b3ac6ee1a97795f797ba
parent 4b04e73a78c5c89dc1a75fb35dea6c947c1d2ac7
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Sun,  9 Dec 2018 14:21:33 -0800

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull kprobes fixes from Ingo Molnar:
 "Two kprobes fixes: a blacklist fix and an instruction patching related
  corruption fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kprobes/x86: Blacklist non-attachable interrupt functions
  kprobes/x86: Fix instruction patching corruption when copying more than one RIP-relative instruction

Diffstat:
March/x86/entry/entry_64.S | 4++++
March/x86/kernel/kprobes/opt.c | 2+-
2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S @@ -566,6 +566,7 @@ ENTRY(interrupt_entry) ret END(interrupt_entry) +_ASM_NOKPROBE(interrupt_entry) /* Interrupt entry/exit. */ @@ -766,6 +767,7 @@ native_irq_return_ldt: jmp native_irq_return_iret #endif END(common_interrupt) +_ASM_NOKPROBE(common_interrupt) /* * APIC interrupts. @@ -780,6 +782,7 @@ ENTRY(\sym) call \do_sym /* rdi points to pt_regs */ jmp ret_from_intr END(\sym) +_ASM_NOKPROBE(\sym) .endm /* Make sure APIC interrupt handlers end up in the irqentry section: */ @@ -960,6 +963,7 @@ ENTRY(\sym) jmp error_exit .endif +_ASM_NOKPROBE(\sym) END(\sym) .endm diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c @@ -189,7 +189,7 @@ static int copy_optimized_instructions(u8 *dest, u8 *src, u8 *real) int len = 0, ret; while (len < RELATIVEJUMP_SIZE) { - ret = __copy_instruction(dest + len, src + len, real, &insn); + ret = __copy_instruction(dest + len, src + len, real + len, &insn); if (!ret || !can_boost(&insn, src + len)) return -EINVAL; len += ret;