diff options
| author | Lv Yunlong <lyl2019@mail.ustc.edu.cn> | 2021-04-02 20:40:19 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-04-07 02:15:21 +0300 |
| commit | b25b343db0526669947a427e9a31bac91d29bb06 (patch) | |
| tree | 837512aec7bdcaf0c48bee264a43075c774afa8c /drivers/net/ethernet/broadcom/bcm4908_enet.c | |
| parent | 08c27f3322fec11950b8f1384aa0f3b11d028528 (diff) | |
| download | linux-b25b343db0526669947a427e9a31bac91d29bb06.tar.xz | |
net: broadcom: bcm4908enet: Fix a double free in bcm4908_enet_dma_alloc
In bcm4908_enet_dma_alloc, if callee bcm4908_dma_alloc_buf_descs() failed,
it will free the ring->cpu_addr by dma_free_coherent() and return error.
Then bcm4908_enet_dma_free() will be called, and free the same cpu_addr
by dma_free_coherent() again.
My patch set ring->cpu_addr to NULL after it is freed in
bcm4908_dma_alloc_buf_descs() to avoid the double free.
Fixes: 4feffeadbcb2e ("net: broadcom: bcm4908enet: add BCM4908 controller driver")
Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bcm4908_enet.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bcm4908_enet.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bcm4908_enet.c b/drivers/net/ethernet/broadcom/bcm4908_enet.c index 98cf82dea3e4..65981931a798 100644 --- a/drivers/net/ethernet/broadcom/bcm4908_enet.c +++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c @@ -172,6 +172,7 @@ static int bcm4908_dma_alloc_buf_descs(struct bcm4908_enet *enet, err_free_buf_descs: dma_free_coherent(dev, size, ring->cpu_addr, ring->dma_addr); + ring->cpu_addr = NULL; return -ENOMEM; } |