Fix FreeBSD "panic: cache_vop_rename: lingering negative entry"#18430
Merged
behlendorf merged 1 commit intoopenzfs:masterfrom Apr 21, 2026
Merged
Fix FreeBSD "panic: cache_vop_rename: lingering negative entry"#18430behlendorf merged 1 commit intoopenzfs:masterfrom
behlendorf merged 1 commit intoopenzfs:masterfrom
Conversation
behlendorf
approved these changes
Apr 15, 2026
Contributor
|
@jm-mikkelsen can you address the checkstyle failure and update this. |
behlendorf
added
Status: Accepted
A FreeBSD ZFS filesystem with properties "utf8only=on" and "normalization=formD" consistently produces this panic when building the lang/perl-5.42.0 port. A ZFS file system with "utf8only=off" and "normalization=none" works fine. The cause of the panic seems to be incorrectly using the FreeBSD namecache when normalisation is present. This commit adds a predicate to prevent that. Signed-off-by: Jan Martin Mikkelsen <janm-github@transactionware.com>
github-actions
Bot
removed
the
Status: Accepted
Contributor
Author
|
@behlendorf The checkstyle test seems to pass now. Let me know if you need anything else. |
behlendorf
approved these changes
Apr 20, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
A FreeBSD ZFS filesystem with properties “utf8only=on” and "normalization=formD” consistently produces this panic when building the lang/perl-5.42.0 port.
A ZFS file system with “utf8only=off” and "normalization=none” works fine.
The cause of the panic seems to be incorrectly using the FreeBSD namecache when normalisation is present. This adds a predicate to prevent that.
This has been tested in a FreeBSD 16-CURRENT environment. Without this patch, building lang/perl-5.42.0 produced a consistent panic on when running llvm-strip. With the patch it works consistently without a panic.
Signed-off-by.