linux/fs/smb
Steve French a395726cf8 cifs: fix data corruption in read after invalidate
When invalidating a file as part of breaking a lease, the folios holding
the file data are disposed of, and truncate calls ->invalidate_folio()
to get rid of them rather than calling ->release_folio().  This means
that the netfs_inode::zero_point value didn't get updated in current
upstream code to reflect the point after which we can assume that the
server will only return zeroes, and future reads will then return blocks
of zeroes if the file got extended for any region beyond the old zero
point.

Fix this by updating zero_point before invalidating the inode in
cifs_revalidate_mapping().

Suggested-by: David Howells <dhowells@redhat.com>
Fixes: 3ee1a1fc39 ("cifs: Cut over to using netfslib")
Reviewed-by: David Howells <dhowell@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2024-05-15 17:22:59 -05:00
..
client cifs: fix data corruption in read after invalidate 2024-05-15 17:22:59 -05:00
common smb: smb2pdu.h: Avoid -Wflex-array-member-not-at-end warnings 2024-05-13 16:46:56 -05:00
server smb: smb2pdu.h: Avoid -Wflex-array-member-not-at-end warnings 2024-05-13 16:46:56 -05:00
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