4.14-stable review patch. If anyone has any objections, please let me know.
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From: Liu Bo bo.li.liu@oracle.com
[ Upstream commit 39b4954c0a1556f8f7f1fdcf59a227117fcd8a0b ]
MD's rdev_set_badblocks() expects that badblocks_set() returns 1 if badblocks are disabled, otherwise, rdev_set_badblocks() will record superblock changes and return success in that case and md will fail to report an IO error which it should.
This bug has existed since badblocks were introduced in commit 9e0e252a048b ("badblocks: Add core badblock management code").
Signed-off-by: Liu Bo bo.li.liu@oracle.com Acked-by: Guoqing Jiang gqjiang@suse.com Signed-off-by: Shaohua Li shli@fb.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- block/badblocks.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/block/badblocks.c +++ b/block/badblocks.c @@ -178,7 +178,7 @@ int badblocks_set(struct badblocks *bb,
if (bb->shift < 0) /* badblocks are disabled */ - return 0; + return 1;
if (bb->shift) { /* round the start down, and the end up */