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fcoe: Stop fc_rport_priv structure leak

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When repeatedly doing rmmod and modprobe on the ixgbe
driver while FCoE is active in a VN2VN configuration,
memory leaks would be discovered by kmemleak with the
following backtrace:

unreferenced object 0xffff88003d076000 (size 1024):
  comm "kworker/0:3", pid 2998, jiffies 4295436448 (age 1015.332s)
  hex dump (first 32 bytes):
    48 8a fe 6f 00 88 ff ff 00 00 00 00 00 00 00 00  H..o............
    01 00 00 00 02 00 00 00 7b ac 87 21 1b 00 00 10  ........{..!....
  backtrace:
    [<ffffffff814b308b>] kmemleak_alloc+0x5b/0xc0
    [<ffffffff8115c6e8>] __kmalloc+0xd8/0x1b0
    [<ffffffffa0216638>] fc_rport_create+0x48/0x1f0 [libfc]
    [<ffffffffa023cd86>] fcoe_ctlr_vn_add.isra.10+0x56/0x1a0 [libfcoe]
    [<ffffffffa023f440>] fcoe_ctlr_vn_recv+0x8b0/0xab0 [libfcoe]
    [<ffffffffa023fb06>] fcoe_ctlr_recv_work+0x4c6/0xf60 [libfcoe]
    [<ffffffff81067404>] process_one_work+0x1e4/0x4d0
    [<ffffffff81068def>] worker_thread+0x10f/0x380
    [<ffffffff8107019a>] kthread+0xea/0xf0
    [<ffffffff814d32ec>] ret_from_fork+0x7c/0xb0
    [<ffffffffffffffff>] 0xffffffffffffffff

This patch stops the leak of the fc_rport_priv structure.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
This commit is contained in:
Mark Rustad 2013-05-18 04:10:07 +00:00 committed by Robert Love
parent a2ceb1fbaa
commit d17efa001a
1 changed files with 4 additions and 0 deletions
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4
drivers/scsi/fcoe/fcoe_ctlr.c
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@ -2090,7 +2090,11 @@ static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
*/
static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
{
struct fc_rport_priv *rdata;
mutex_lock(&lport->disc.disc_mutex);
list_for_each_entry_rcu(rdata, &lport->disc.rports, peers)
lport->tt.rport_logoff(rdata);
lport->disc.disc_callback = NULL;
mutex_unlock(&lport->disc.disc_mutex);
}