[PATCH][SCSI][resend] aacraid: Remove mem leak in aac_send_raw_srb()

[PATCH][SCSI][resend] aacraid: Remove mem leak in aac_send_raw_srb()

[Jesper Juhl]

We leak in drivers/scsi/aacraid/commctrl.c::aac_send_raw_srb() :

We allocate memory:
        ...
                        struct user_sgmap* usg;
                        usg = kmalloc(actual_fibsize - sizeof(struct aac_srb)
                          + sizeof(struct sgmap), GFP_KERNEL);
and then neglect to free it:
        ...
                        for (i = 0; i < usg->count; i++) {
                                u64 addr;
                                void* p;
                                if (usg->sg[i].count >
                                    ((dev->adapter_info.options &
                                     AAC_OPT_NEW_COMM) ?
                                      (dev->scsi_host_ptr->max_sectors << 9) :
                                      65536)) {
                                        rcode = -EINVAL;
                                        goto cleanup;
        ... this 'goto' makes 'usg' go out of scope and leak the memory we 
            allocated.
            Other exits properly kfree(usg), it's just here it is neglected.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
---
 commctrl.c |    1 +
 1 file changed, 1 insertion(+)

 patch against current Linus tree.
 compile tested only, but I'm pretty certain it is sound.

diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 645ddd9..33370fb 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -649,6 +649,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
 				     AAC_OPT_NEW_COMM) ?
 				      (dev->scsi_host_ptr->max_sectors << 9) :
 				      65536)) {
+					kfree(usg);
 					rcode = -EINVAL;
 					goto cleanup;
 				}


-- 
Jesper Juhl <jj@chaosbits.net>       http://www.chaosbits.net/
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