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| author | Alan Stern <stern@rowland.harvard.edu> | 2005-10-14 11:23:27 -0400 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-10-16 15:35:11 -0500 |
| commit | 7c72ce81870ded9365f4bc5caa98ef1591dd18dd (patch) | |
| tree | ff1eae57d11693f7e2d36efd3fdc26efa45e1419 | |
| parent | d16794f6ac8d9b50f62e02a6e6175ae1a30d0ccd (diff) | |
| download | linux-7c72ce81870ded9365f4bc5caa98ef1591dd18dd.tar.gz linux-7c72ce81870ded9365f4bc5caa98ef1591dd18dd.tar.bz2 linux-7c72ce81870ded9365f4bc5caa98ef1591dd18dd.zip | |
[SCSI] Fix leak of Scsi_Cmnds
When a request is deferred in scsi_init_io because the sg table could not
be allocated, the associated scsi_cmnd is not released and the request is
not marked with REQ_DONTPREP. When the command is retried, if
scsi_prep_fn decides to kill it then the scsi_cmnd will never be released.
This patch (as573) changes scsi_init_io so that it calls scsi_put_command
before deferring a request.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index dc9c772bc874..0074f28c37b2 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -97,7 +97,6 @@ int scsi_insert_special_req(struct scsi_request *sreq, int at_head) } static void scsi_run_queue(struct request_queue *q); -static void scsi_release_buffers(struct scsi_cmnd *cmd); /* * Function: scsi_unprep_request() @@ -1040,8 +1039,10 @@ static int scsi_init_io(struct scsi_cmnd *cmd) * if sg table allocation fails, requeue request later. */ sgpnt = scsi_alloc_sgtable(cmd, GFP_ATOMIC); - if (unlikely(!sgpnt)) + if (unlikely(!sgpnt)) { + scsi_unprep_request(req); return BLKPREP_DEFER; + } cmd->request_buffer = (char *) sgpnt; cmd->request_bufflen = req->nr_sectors << 9; @@ -1245,8 +1246,8 @@ static int scsi_prep_fn(struct request_queue *q, struct request *req) */ ret = scsi_init_io(cmd); switch(ret) { + /* For BLKPREP_KILL/DEFER the cmd was released */ case BLKPREP_KILL: - /* BLKPREP_KILL return also releases the command */ goto kill; case BLKPREP_DEFER: goto defer; |