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nfsd: don't ignore high bits of copy count

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Note size_t is 32-bit on a 32-bit architecture, but cp_count is defined
by the protocol to be 64 bit, so we could be turning a large copy into a
0-length copy here.

Reported-by: <radchenkoy@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
J. Bruce Fields 2021-03-18 20:03:22 -04:00 • committed by Chuck Lever
parent 792a5112aa
commit e7a833e9cc
1 changed files with 1 additions and 1 deletions
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2
fs/nfsd/nfs4proc.c
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@ -1383,7 +1383,7 @@ static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
{
ssize_t bytes_copied = 0;
size_t bytes_total = copy->cp_count;
u64 bytes_total = copy->cp_count;
u64 src_pos = copy->cp_src_pos;
u64 dst_pos = copy->cp_dst_pos;