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| author |   Grygorii Strashko <grygorii.strashko@ti.com> | 2017-01-31 14:04:04 -0600 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-02-01 12:05:51 -0500 |
| commit | f696186203076770f51eb5890712e696e6bb72d7 (patch) | |
| tree | 6e9f8d9cc02b333153a203b29ae62168063317f9 /net/unix/af_unix.c | |
| parent | net: reduce skb_warn_bad_offload() noise (diff) | |
| download | wireguard-linux-f696186203076770f51eb5890712e696e6bb72d7.tar.xz wireguard-linux-f696186203076770f51eb5890712e696e6bb72d7.zip | |
net: ethernet: ti: cpsw: fix NULL pointer dereference in switch mode
In switch mode on struct cpsw_slave->ndev field will be initialized with
proper value only for the one cpsw slave port, as result
cpsw_get_usage_count() will generate "Unable to handle kernel NULL pointer
dereference" exception when first ethernet interface is opening
cpsw_ndo_open(). This issue causes boot regression on AM335x EVM and
reproducible on am57xx-evm (switch mode).
Fix it by adding additional check for !cpsw->slaves[i].ndev in
cpsw_get_usage_count().
Cc: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Fixes: 03fd01ad0eea ("net: ethernet: ti: cpsw: don't duplicate ndev_running")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions