Fix by returning -EINVAL instead of 0, per man page of copy_file_range, when the requested range extends beyond the end of the source file. Probem was discovered by subtest inter11 of nfstest_ssc. Signed-off-by: Dai Ngo <dai.ngo@xxxxxxxxxx> --- fs/read_write.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/read_write.c b/fs/read_write.c index 75f764b43418..438c00910716 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1445,7 +1445,7 @@ static int generic_copy_file_checks(struct file *file_in, loff_t pos_in, /* Shorten the copy to EOF */ size_in = i_size_read(inode_in); if (pos_in >= size_in) - count = 0; + count = -EINVAL; else count = min(count, size_in - (uint64_t)pos_in); -- 2.9.5
