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* [BUG] net: ethernet: lpc_eth: possible uninitialized-variable access in lpc_eth_drv_probe()
@ 2021-07-31  6:34 Li Tuo
  0 siblings, 0 replies; only message in thread
From: Li Tuo @ 2021-07-31  6:34 UTC (permalink / raw)
  To: vz, davem, kuba; +Cc: linux-arm-kernel, netdev, linux-kernel, baijiaju1990

Hello,

Our static analysis tool finds a possible uninitialized-variable access 
in the nxp driver in Linux 5.14.0-rc3:

At the beginning of the function lpc_eth_drv_probe(), the variable 
dma_handle is not initialized.
If the following conditions are false, it remains uninitialized.
1304:    if (use_iram_for_net(dev))
1314:    if (pldat->dma_buff_base_v == NULL)

However, it is accessed through:
1333:    pldat->dma_buff_base_p = dma_handle;;

I am not quite sure whether this possible uninitialized-variable access 
is real and how to fix it if it is real.
Any feedback would be appreciated, thanks!

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>

Best wishes,
Tuo Li

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2021-07-31  6:34 [BUG] net: ethernet: lpc_eth: possible uninitialized-variable access in lpc_eth_drv_probe() Li Tuo

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