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authorBoaz Harrosh <bharrosh@panasas.com>2009-03-24 14:35:07 +0300
committerJens Axboe <jens.axboe@oracle.com>2009-03-26 13:01:23 +0300
commit1cd96c242a829d52f7a5ae98f554ca9775429685 (patch)
tree018d3ab9fa0d6e2bcd739483ac2693f6f71db96b /block/blk-core.c
parentf028f3b2f987ebc61cef382ab7a5c449917b728e (diff)
downloadlinux-1cd96c242a829d52f7a5ae98f554ca9775429685.tar.xz
block: WARN in __blk_put_request() for potential bio leak
Put a WARN_ON in __blk_put_request if it is about to leak bio(s). This is a serious bug that can happen in error handling code paths. For this to work I have fixed a couple of places in block/ where request->bio != NULL ownership was not honored. And a small cleanup at sg_io() while at it. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 7b63c9b6333d..996ed906d8ca 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1062,6 +1062,9 @@ void __blk_put_request(struct request_queue *q, struct request *req)
elv_completed_request(q, req);
+ /* this is a bio leak */
+ WARN_ON(req->bio != NULL);
+
/*
* Request may not have originated from ll_rw_blk. if not,
* it didn't come out of our reserved rq pools