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- Kprobes/x86: Fix to emulate indirect call which size is not 5 byte.
Current code expects the indirect call instructions are 5 bytes, but
that is incorrect. Usually indirect call based on register is shorter
than that, thus the emulation causes a kernel crash by accessing
wrong instruction boundary. This uses the instruction size to
calculate the return address correctly.
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Merge tag 'probes-fixes-v6.7-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull kprobes/x86 fix from Masami Hiramatsu:
- Fix to emulate indirect call which size is not 5 byte.
Current code expects the indirect call instructions are 5 bytes, but
that is incorrect. Usually indirect call based on register is shorter
than that, thus the emulation causes a kernel crash by accessing
wrong instruction boundary. This uses the instruction size to
calculate the return address correctly.
* tag 'probes-fixes-v6.7-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
x86/kprobes: fix incorrect return address calculation in kprobe_emulate_call_indirect
7131c2e9bb