Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

stat,seccomp: fix 32-bit overflow on stat quantities #98

Open
wants to merge 3 commits into
base: main
Choose a base branch
from
Open

stat,seccomp: fix 32-bit overflow on stat quantities #98

wants to merge 3 commits into from

Commits on Nov 4, 2024

  1. seccomp: add syscall emulation for safe syscalls, like mknod of /dev/… 

    …null devices.
    @Snaipe
    Snaipe committed Nov 4, 2024
    Configuration menu
    Copy the full SHA
    56633d0 View commit details
    Browse the repository at this point in the history

  2. seccomp: add support for aarch64

    @Snaipe
    Snaipe committed Nov 4, 2024
    Configuration menu
    Copy the full SHA
    01f207f View commit details
    Browse the repository at this point in the history

Commits on Nov 12, 2024

  1. stat,seccomp: fix 32-bit overflow on stat quantities 

    On most i686 distributions, glibc implements stat() for programs compiled
without -D_FILE_OFFSET_BITS=64 by calling the corresponding stat64 system
call, and if any of the 64-bit quantities in the statbuf are larger than
2^32-1, the glibc wrapper pretends the file does not exist by returning
ENOENT.

This flag mitigates the issue by pulling the rug under glibc and rewriting
the quantities to stay within bounds. For timestamps, a fixed date within
range is used. For inode numbers, the value is rewritten in a way that
keeps the (device, inode) pair unique.
    @Snaipe
    Snaipe committed Nov 12, 2024
    Configuration menu
    Copy the full SHA
    93bc506 View commit details
    Browse the repository at this point in the history