[Bug 127912] In theory, uncompress(1) may crash and SEGV

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=127912

--- Comment #3 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=818c7b769a4f7d3c8fecc4cf491f4e22ef816eba

commit 818c7b769a4f7d3c8fecc4cf491f4e22ef816eba
Author:     David Jones <drj@ravenbrook.com>
AuthorDate: 2024-10-11 15:49:17 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-10-11 15:50:09 +0000

    uncompress: Avoid reading an extra byte

    When reading the next code in a stream, avoid reading an extra byte if
    we're going to throw it away. When there's no more bits to extract from
    the stream, bits will be 0 and we'll mask the read byte with 0 anyway.
    At worst, this will avoid reading one past the end of gbuf array (which
    is not possible in well formed streams).

    PR: 127912
    Reviewed by:    emaste
    Differential Revision:  https://reviews.freebsd.org/D47041

 usr.bin/compress/zopen.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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