| From | Alexander Potapenko <> | Date | Fri, 8 Dec 2023 15:18:16 +0100 | Subject | Re: [PATCH v2 26/33] s390/ftrace: Unpoison ftrace_regs in kprobe_ftrace_handler() |
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On Tue, Nov 21, 2023 at 11:02 PM Ilya Leoshkevich <iii@linux.ibm.com> wrote: > > s390 uses assembly code to initialize ftrace_regs and call > kprobe_ftrace_handler(). Therefore, from the KMSAN's point of view, > ftrace_regs is poisoned on kprobe_ftrace_handler() entry. This causes > KMSAN warnings when running the ftrace testsuite. > > Fix by trusting the assembly code and always unpoisoning ftrace_regs in > kprobe_ftrace_handler(). > > Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Alexander Potapenko <glider@google.com>
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