From: David Sterba <dsterba@suse.cz>
Date: Tue, 6 Jan 2015 17:54:48 +0000 (+0100)
Subject: btrfs-progs: convert, handle pwrite error in do_rollback
X-Git-Tag: upstream/4.16.1~2459
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1f7ea87871d9bd743d31618f96e1a3f2dd5bde91;p=platform%2Fupstream%2Fbtrfs-progs.git

btrfs-progs: convert, handle pwrite error in do_rollback

Resolves-coverity-id: 1242984
Signed-off-by: David Sterba <dsterba@suse.cz>
---

diff --git a/btrfs-convert.c b/btrfs-convert.c
index c503bf6..bbd19bb 100644
--- a/btrfs-convert.c
+++ b/btrfs-convert.c
@@ -2675,6 +2675,12 @@ next_extent:
 		if (bytenr >= total_bytes)
 			break;
 		ret = pwrite(fd, buf, sectorsize, bytenr);
+		if (ret != sectorsize) {
+			fprintf(stderr,
+				"error during zeroing supreblock %d: %d\n",
+				i, ret);
+			goto fail;
+		}
 	}
 
 	sb_bytenr = (u64)-1;