memcpy seg fault with mmaped address

Hi, I'm memcpy data into mmaped address with 2GB file, after a few files, it would fault with the following stack dump: received signal SIGSEGV, Segmentation fault.[Switching to Thread 0x7ffff5e95700 (LWP 3028)] __memmove_avx_unaligned_erms ()     at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:494 494    ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S: No such file or directory. (gdb) bt #0  __memmove_avx_unaligned_erms ()     at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:494 Any idea? Thanks, David