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Commit 92b66d2c authored by Miklos Szeredi's avatar Miklos Szeredi
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vfs: limit size of dedupe 



Suggested-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent ce397d21

fs/read_write.c

+3 −0
Original line number Diff line number Diff line
@@ -2003,6 +2003,9 @@ int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same) 
	if (off + len > i_size_read(src))

		return -EINVAL;



	/* Arbitrary 1G limit on a single dedupe request, can be raised. */

	len = min_t(u64, len, 1 << 30);



	/* pre-format output fields to sane values */

	for (i = 0; i < count; i++) {

		same->info[i].bytes_deduped = 0ULL;