diff options
| author | Bo Chen <chenbo@pdx.edu> | 2018-07-23 19:01:29 +0300 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2018-08-24 18:52:35 +0300 |
| commit | cf1acec008f8d7761aa3fd7c4bca7e17b2d2512d (patch) | |
| tree | 3cbb7fec010ad6d8bedeffb3ecbccec1c3e7c70c /drivers/net/ethernet | |
| parent | a9910c0886470b659a6c3629d6467d5639c327e9 (diff) | |
| download | linux-cf1acec008f8d7761aa3fd7c4bca7e17b2d2512d.tar.xz | |
e1000: check on netif_running() before calling e1000_up()
When the device is not up, the call to 'e1000_up()' from the error handling path
of 'e1000_set_ringparam()' causes a kernel oops with a null-pointer
dereference. The null-pointer dereference is triggered in function
'e1000_alloc_rx_buffers()' at line 'buffer_info = &rx_ring->buffer_info[i]'.
This bug was reported by COD, a tool for testing kernel module binaries I am
building. This bug was also detected by KFI from Dr. Kai Cong.
This patch fixes the bug by checking on 'netif_running()' before calling
'e1000_up()' in 'e1000_set_ringparam()'.
Signed-off-by: Bo Chen <chenbo@pdx.edu>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000/e1000_ethtool.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/e1000/e1000_ethtool.c b/drivers/net/ethernet/intel/e1000/e1000_ethtool.c index bdb3f8e65ed4..c1e4e94f100f 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_ethtool.c +++ b/drivers/net/ethernet/intel/e1000/e1000_ethtool.c @@ -644,7 +644,8 @@ err_setup_rx: err_alloc_rx: kfree(txdr); err_alloc_tx: - e1000_up(adapter); + if (netif_running(adapter->netdev)) + e1000_up(adapter); err_setup: clear_bit(__E1000_RESETTING, &adapter->flags); return err; |