[SRU][N][PATCH 0/1] CVE-2025-37801

[Alessio Faina]

https://ubuntu.com/security/CVE-2025-37801

[ Impact ]

spi: spi-imx: Add check for spi_imx_setupxfer()

Add check for the return value of spi_imx_setupxfer().
spi_imx->rx and spi_imx->tx function pointer can be NULL when
spi_imx_setupxfer() return error, and make NULL pointer dereference.

 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
 Call trace:
  0x0
  spi_imx_pio_transfer+0x50/0xd8
  spi_imx_transfer_one+0x18c/0x858
  spi_transfer_one_message+0x43c/0x790
  __spi_pump_transfer_message+0x238/0x5d4
  __spi_sync+0x2b0/0x454
  spi_write_then_read+0x11c/0x200

[ Fix ]

Introduce a check for the spi_imx_setupxfer function; if the function
failed to setup the transfer, exit and do not use a potential NULL pointer.

[ Test Plan ]

Compiled and boot tested only.

[ Regression Potential ]

No regression potential, introducing only a NULL pointer check.

Tamura Dai (1):
  spi: spi-imx: Add check for spi_imx_setupxfer()

 drivers/spi/spi-imx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

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2.43.0