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Fix "panic: cache_vop_rename: lingering negative entry"

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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.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Jan Martin Mikkelsen <[email protected]>
Closes #18430
This commit is contained in:
Jan Martin Mikkelsen authored and GitHub committed 2026-04-21 14:19:10 -07:00
1 parent 6562851406
commit 513710ed21
1 file changed
+1 -1
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module/os/freebsd/zfs/zfs_vnops_os.c
+1 -1
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@@ -3519,7 +3519,7 @@ zfs_do_rename_impl(vnode_t *sdvp, vnode_t **svpp, struct componentname *scnp,
ZRENAMING, NULL));
}
}
if (error == 0) {
if (error == 0 && zfsvfs->z_use_namecache) {
cache_vop_rename(sdvp, *svpp, tdvp, *tvpp, scnp, tcnp);
}
}