[Bug 275570] self-referential nullfs mount over tmpfs in combination with MNT_UPDATE results in a hang

[email protected] Sat, 23 May 2026 07:14:10 +0000

Newsgroups	gmane.os.freebsd.devel.file-systems
Message-ID	<[email protected]/bugzilla/>

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275570

--- Comment #8 from [email protected] ---
A commit in branch stable/15 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=b393aa8e30b5911a5177b6aaacd5a62beea8e3d6

commit b393aa8e30b5911a5177b6aaacd5a62beea8e3d6
Author:     Konstantin Belousov <[email protected]>
AuthorDate: 2026-05-16 22:16:45 +0000
Commit:     Konstantin Belousov <[email protected]>
CommitDate: 2026-05-23 06:56:13 +0000

    nullfs: do not allow to mount a vnode over itself

    PR:     275570

    (cherry picked from commit 7bdf2b5d5fbabfc8749c4ff6e618c3e843b14de0)

 sys/fs/nullfs/null_vfsops.c | 8 ++++++++
 1 file changed, 8 insertions(+)

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