Two changes to proc_walk:

Don't read any file that is not world-readable. This avoids trouble when
running as root, since on Linux various special files can cause odd
interactions and/or blocking behavior when read (for instance /proc/kmsg).
ssumption is that no such files are world-readable. This also avoids any
issue of reading data that is potentially sensitive.

Instead of reading the first 1 KB of each file, only read the first 128
bytes. This prevents large files (like /proc/config.gz or /proc/kallsyms)
from swamping the input buffer; these inputs are pretty static and
shouldn't count for much. Reducing to 128 bytes causes a poll to read
about 400 different files, rather than ~30.

0 files changed, 0 insertions, 0 deletions