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Nicholas Piggin authored
tabort_syscall runs with RI=1, so a nested recoverable machine check will load the paca into r13 and overwrite what we loaded it with, because exceptions returning to privileged mode do not restore r13. Fixes: b4b56f9e (powerpc/tm: Abort syscalls in active transactions) Cc: stable@vger.kernel.org Signed-off-by:
Nick Piggin <npiggin@gmail.com> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
cc7786d3