[Bug 274268] panic: vfs_lookup: encountered unexpected nul; string when a symlink contains an embedded NUL

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274268

--- Comment #6 from commit-hook@FreeBSD.org ---
A commit in branch stable/13 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=ec3864cc68617edb106724a6d423b47ec455e31b

commit ec3864cc68617edb106724a6d423b47ec455e31b
Author:     Alan Somers <asomers@FreeBSD.org>
AuthorDate: 2023-10-04 18:48:01 +0000
Commit:     Alan Somers <asomers@FreeBSD.org>
CommitDate: 2023-10-15 13:02:07 +0000

    fusefs: sanitize FUSE_READLINK results for embedded NULs

    If VOP_READLINK returns a path that contains a NUL, it will trigger an
    assertion in vfs_lookup.  Sanitize such paths in fusefs, rejecting any
    and warning the user about the misbehaving server.

    PR:             274268
    Sponsored by:   Axcient
    Reviewed by:    mjg, markj
    Differential Revision: https://reviews.freebsd.org/D42081

    (cherry picked from commit 662ec2f781521c36b76af748d74bb0a3c2e27a76)

 sys/fs/fuse/fuse_ipc.h          |  1 +
 sys/fs/fuse/fuse_vnops.c        |  7 +++++++
 tests/sys/fs/fusefs/readlink.cc | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+)

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