NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes

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iattr::ia_size is a loff_t, so these NFSv3 procedures must be
careful to deal with incoming client size values that are larger
than s64_max without corrupting the value.

Silently capping the value results in storing a different value
than the client passed in which is unexpected behavior, so remove
the min_t() check in decode_sattr3().

Note that RFC 1813 permits only the WRITE procedure to return
NFS3ERR_FBIG. We believe that NFSv3 reference implementations
also return NFS3ERR_FBIG when ia_size is too large.

Cc: stable@vger.kernel.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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Chuck Lever 2022-01-25 15:59:57 -05:00

parent e6faac3f58

commit a648fdeb7c

1 changed files with 1 additions and 1 deletions

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fs/nfsd/nfs3xdr.c

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