btrfs: use scoped_with_init_fs() for update_dev_time()

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update_dev_time() can be called from both kthread and process context.
Use scoped_with_init_fs() to temporarily override current->fs for
the kern_path() call when running in kthread context so the path
lookup happens in init's filesystem context.

update_dev_time() ← btrfs_scratch_superblocks() ←
btrfs_dev_replace_finishing() ← btrfs_dev_replace_kthread()
← kthread (kthread_run)

Also called from ioctl (user process).

Link: https://patch.msgid.link/20260601-work-kthread-nullfs-v4-10-77ee053060e0@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

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Christian Brauner 2026-06-01 15:56:43 +02:00

parent c3f4513c78

commit f565f3b064

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fs/btrfs/volumes.c

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