iomap: error out on file IO when there is no inline_data buffer

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Return IO errors if an ->iomap_begin implementation returns an
IOMAP_INLINE buffer but forgets to set the inline_data pointer.
Filesystems should never do this, but we could help fs developers (me)
fix their bugs by handling this more gracefully than crashing the
kernel.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/175803480324.966383.7414345025943296442.stgit@frogsfrogsfrogs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Darrick J. Wong 2025-09-16 08:00:45 -07:00 • committed by Christian Brauner

parent 231af8c14f

commit 6a96fb653b

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2 changed files with 13 additions and 5 deletions

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15

fs/iomap/buffered-io.c

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3

fs/iomap/direct-io.c

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