in one of the wasmtime tests (host=x86_64, guest=s390x).
GDB shows that the root cause is actually this:
Thread 181 "wasi_tokio::pat" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff6c54640 (LWP 168352)]
0x0000555555626736 in do_tb_phys_invalidate (tb=tb@entry=0x7fffea4b8500
<code_gen_buffer+38503635>, rm_from_page_list=rm_from_page_list@entry=true) at
qemu/accel/tcg/translate-all.c:1192
1192 if (qatomic_read(&jc->array[h].tb) == tb) {
(gdb) bt
#0 0x0000555555626736 in do_tb_phys_invalidate (tb=tb@entry=0x7fffea4b8500
<code_gen_buffer+38503635>, rm_from_page_list=rm_from_page_list@entry=true) at
qemu/accel/tcg/translate-all.c:1192
#1 0x0000555555626b98 in tb_phys_invalidate__locked (tb=0x7fffea4b8500
<code_gen_buffer+38503635>) at qemu/accel/tcg/translate-all.c:1211
#2 tb_invalidate_phys_page_range__locked (p=<optimized out>,
start=start@entry=836716683264, end=end@entry=836716687360, retaddr=0, pages=0x0) at
qemu/accel/tcg/translate-all.c:1678
#3 0x0000555555626dfb in tb_invalidate_phys_range (start=836716683264,
start@entry=836716584960, end=end@entry=836716982272) at
qemu/accel/tcg/translate-all.c:1753
#4 0x0000555555639e43 in target_munmap (start=start@entry=836716584960,
len=len@entry=397312) at qemu/linux-user/mmap.c:769
Let me know if you need more information, I can try to extract a
minimal reproducer.