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Commit ac3b6faf authored by Zachary Amsden's avatar Zachary Amsden Committed by Andi Kleen
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[PATCH] i386: Kprobe rpl fix 



Kprobes bugfix for paravirt compatibility - RPL on the CS when inserting
BPs must match running kernel.

Signed-off-by: default avatarZachary Amsden <zach@vmware.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
CC: Eric Biederman <ebiederm@xmission.com>
parent 7b355202

arch/i386/kernel/kprobes.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -408,7 +408,7 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs) 
	spin_lock_irqsave(&kretprobe_lock, flags);

	spin_lock_irqsave(&kretprobe_lock, flags);

	head = kretprobe_inst_table_head(current);

	head = kretprobe_inst_table_head(current);

	/* fixup registers */

	/* fixup registers */

	regs->xcs = __KERNEL_CS;

	regs->xcs = __KERNEL_CS | get_kernel_rpl();

	regs->eip = trampoline_address;

	regs->eip = trampoline_address;

	regs->orig_eax = 0xffffffff;

	regs->orig_eax = 0xffffffff;