Change Details

Replace malloc + read in a loop with mmap This fixes a few problems: - if lseek(2) fails, bootsize underflows to SIZE_T_MAX, making the resulting allocation dangerous - if malloc(3) fails, we end up with a null pointer deref later - if read(2) fails, the installer will hang trying to read(2) boot loader code

bsdinstall(8): partedit can hang/crash on read/lseek/malloc failures This fixes a few problems: - if lseek(2) fails, bootsize underflows to SIZE_T_MAX, making the resulting allocation dangerous - if malloc(3) fails, we end up with a null pointer deref later - if read(2) fails, the installer will hang trying to read(2) boot loader code

Replace malloc +bsdinstall(8): partedit can hang/crash on read in a loop with mmap/lseek/malloc failures This fixes a few problems: - if lseek(2) fails, bootsize underflows to SIZE_T_MAX, making the resulting allocation dangerous - if malloc(3) fails, we end up with a null pointer deref later - if read(2) fails, the installer will hang trying to read(2) boot loader code