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authorAndreas Gruenbacher <agruenba@redhat.com>2021-07-15 23:31:02 +0300
committerAndreas Gruenbacher <agruenba@redhat.com>2021-10-24 16:26:05 +0300
commit42c498c18a94eed79896c50871889af52fa0822e (patch)
treea7e1776997955259906c4dbd94eb19a597dfa21d /fs/iomap/direct-io.c
parent00bfe02f479688a67a29019d1228f1470e26f014 (diff)
downloadlinux-42c498c18a94eed79896c50871889af52fa0822e.tar.xz
iomap: Fix iomap_dio_rw return value for user copies
When a user copy fails in one of the helpers of iomap_dio_rw, fail with -EFAULT instead of returning 0. This matches what iomap_dio_bio_actor returns when it gets an -EFAULT from bio_iov_iter_get_pages. With these changes, iomap_dio_actor now consistently fails with -EFAULT when a user page cannot be faulted in. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/iomap/direct-io.c')
-rw-r--r--fs/iomap/direct-io.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index 4ecd255e0511..a2a368e824c0 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -371,6 +371,8 @@ static loff_t iomap_dio_hole_iter(const struct iomap_iter *iter,
loff_t length = iov_iter_zero(iomap_length(iter), dio->submit.iter);
dio->size += length;
+ if (!length)
+ return -EFAULT;
return length;
}
@@ -402,6 +404,8 @@ static loff_t iomap_dio_inline_iter(const struct iomap_iter *iomi,
copied = copy_to_iter(inline_data, length, iter);
}
dio->size += copied;
+ if (!copied)
+ return -EFAULT;
return copied;
}