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IBM CI has reported a kernel crash while running selftests/powerpc/signal on a POWER9 pSeries system. I attempted to reproduce this issue manually, but was not successful so far. Below are the details of the crash as reported by CI. Crash Details: [ 9798.880148] Unexpected TM Bad Thing exception at c00000000000dbac                (msr 0x8000000302a03031) tm_scratch=800000010280b033 [ 9798.880160] Oops: Unrecoverable exception, sig: 6 [#1] [ 9798.880165] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=8192 NUMA pSeries [ 9798.880173] Modules linked in: nvram(E) rpadlpar_io(E) rpaphp(E) ... [ 9798.880233] CPU: 8 UID: 0 PID: 1039530 Comm: sigfuz                Tainted: G            E       7.1.0-rc1 #1 PREEMPT [ 9798.880245] Hardware name: IBM,8375-42A POWER9 (architected)                hv:phyp pSeries [ 9798.880251] NIP:  c00000000000dbac LR: 0000000010001e58 [ 9798.880262] MSR:  8000000302a03031 Call Trace: NIP [c00000000000dbac] interrupt_return_srr_kernel+0x15c/0x18c Call Trace:  tm_reclaim_thread  flush_tmregs_to_thread  vsr_get  regset_get_alloc  fill_thread_core_info.isra.0  fill_note_info  elf_core_dump  coredump_write  do_coredump  vfs_coredump  get_signal  do_signal  do_notify_resume  interrupt_exit_user_prepare_main  interrupt_exit_user_prepare  interrupt_return_srr_user Please let me know if further details are required. If you happen to fix this issue, please add below tag. Reported-by: Venkat Rao Bagalkote Regards, Venkat.