49b4c5f864
Add a sanity check of the disk_buf first three bytes. The original code on a disk with nul bytes was causing integer overflow and thus calling the memcmp(3) functin in is_zero() with enormous length. Verity that the 0th byte is JMP, 1th a signed byte >=9 to prevent overflow and 2th byte NOP. Add a comment explaining the check. Detected with MKSANITIZER and ASan. |
||
|---|---|---|
| .. | ||
| arch | ||
| Makefile | ||
| bbinfo.c | ||
| ext2fs.c | ||
| ffs.c | ||
| fstypes.c | ||
| installboot.8 | ||
| installboot.c | ||
| installboot.h | ||
| machines.c | ||
| sum.c | ||