Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf: Fix unsafe frame rewinding with hot regs fetching
+6
-2
arch/x86/kernel/dumpstack.h
+6
-2
arch/x86/kernel/dumpstack.h
···
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#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
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#endif
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+
#include <linux/uaccess.h>
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+
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extern void
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show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
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unsigned long *stack, unsigned long bp, char *log_lvl);
···
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get_bp(frame);
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#ifdef CONFIG_FRAME_POINTER
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-
while (n--)
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-
frame = frame->next_frame;
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+
while (n--) {
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+
if (probe_kernel_address(&frame->next_frame, frame))
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+
break;
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+
}
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#endif
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return (unsigned long)frame;