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staging: slicoss: fix use-after-free bug in slic_entry_remove 

This patch fixes a use-after-free bug that causes a null pointer
dereference in slic_entry_halt.

Since unregister_netdev() will ultimately call slic_entry_halt (the
net_device ndo_stop() virtual function for this device), we should
call it before freeing the memory used by slic_entry_halt.

Signed-off-by: David Matlack <dmatlack@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Matlack 2014-05-05 21:02:37 -07:00 committed by Greg Kroah-Hartman
parent 0783c636d1
commit dedabbbcb5
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/slicoss/slicoss.c
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@ -2525,9 +2525,10 @@ static void slic_entry_remove(struct pci_dev *pcidev)
struct sliccard *card;
struct mcast_address *mcaddr, *mlist;
unregister_netdev(dev);
slic_adapter_freeresources(adapter);
slic_unmap_mmio_space(adapter);
unregister_netdev(dev);
/* free multicast addresses */
mlist = adapter->mcastaddrs;