freebsd-nq/sys/ufs
Kirk McKusick 93440bbefd The binary representation of the superblock (the fs structure) is written
out verbatim to the disk: see ffs_sbput() in sys/ufs/ffs/ffs_subr.c.
It contains a pointer to the fs_summary_info structure. This pointer
value inadvertently causes garbage to be stored. It is garbage because
the pointer to the fs_summary_info structure is the address the then
current stack or heap. Although a mere pointer does not reveal anything
useful (like a part of a private key) to an attacker, garbage output
deteriorates reproducibility.

This commit zeros out the pointer to the fs_summary_info structure
before writing the out the superblock.

Reviewed by:  kib
Tested by:    Peter Holm
PR:           246983
Sponsored by: Netflix
2020-06-19 01:04:25 +00:00
..
ffs The binary representation of the superblock (the fs structure) is written 2020-06-19 01:04:25 +00:00
ufs Move all of the functions in ffs_subr.c that are only used by the ufs kernel 2020-06-17 23:39:52 +00:00