diff options
| author | Tong Zhang <ztong0001@gmail.com> | 2021-09-08 12:02:32 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-06 15:05:06 +0200 |
| commit | a7d521cc726f30b8e679a6f36d04b18a8ab3c536 (patch) | |
| tree | a0f27504c6c4a5ac69c701f649e73df09f24ca6b /drivers | |
| parent | d56171d9360c0170c5c5f8f7e2362a2e999eca40 (diff) | |
net: macb: fix use after free on rmmod
[ Upstream commit d82d5303c4c539db86588ffb5dc5b26c3f1513e8 ]
plat_dev->dev->platform_data is released by platform_device_unregister(),
use of pclk and hclk is a use-after-free. Since device unregister won't
need a clk device we adjust the function call sequence to fix this issue.
[ 31.261225] BUG: KASAN: use-after-free in macb_remove+0x77/0xc6 [macb_pci]
[ 31.275563] Freed by task 306:
[ 30.276782] platform_device_release+0x25/0x80
Suggested-by: Nicolas Ferre <Nicolas.Ferre@microchip.com>
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_pci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/cadence/macb_pci.c b/drivers/net/ethernet/cadence/macb_pci.c index 248a8fc45069..f06fddf9919b 100644 --- a/drivers/net/ethernet/cadence/macb_pci.c +++ b/drivers/net/ethernet/cadence/macb_pci.c @@ -123,9 +123,9 @@ static void macb_remove(struct pci_dev *pdev) struct platform_device *plat_dev = pci_get_drvdata(pdev); struct macb_platform_data *plat_data = dev_get_platdata(&plat_dev->dev); - platform_device_unregister(plat_dev); clk_unregister(plat_data->pclk); clk_unregister(plat_data->hclk); + platform_device_unregister(plat_dev); } static const struct pci_device_id dev_id_table[] = { |