cifs: add revalidation on FSCTL failure in smb2_duplicate_extents()

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smb2_duplicate_extents() has no handling for
FSCTL_DUPLICATE_EXTENTS_TO_FILE failure: when the FSCTL fails, local
inode metadata may be stale from the pre-extension or from concurrent
remote writes, but is never refreshed.

Force revalidation on FSCTL failure and use i_size_read() for the
pre-extension check.

Fixes: cfc63fc812 ("smb3: fix cached file size problems in duplicate extents (reflink)")
Cc: stable@vger.kernel.org
Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Signed-off-by: Paulo Alcantara <pc@manguebit.org>

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Frank Sorenson 2026-08-23 18:26:46 -05:00 • committed by Paulo Alcantara

parent 45c13f3f9e

commit 53676a5e28

1 changed files with 5 additions and 2 deletions

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fs/smb/client/smb2ops.c

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