Jiangshan Yi 7fb13fd7e9 serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms ...

Commit b1b4efea05 ("serial: 8250_mid: Disable DMA for selected
platforms") replaced the dnv_board setup and exit callbacks with
PTR_IF(false, ...), which evaluates to NULL. However, the three call
sites in mid8250_probe() and mid8250_remove() unconditionally
dereference these function pointers without NULL checks, causing a NULL
pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon
D (ICX-D/CDF), or Snowridge (SNR) platform.

Fix this by adding the missing NULL checks before calling the setup and
exit callbacks.

Fixes: b1b4efea05 ("serial: 8250_mid: Disable DMA for selected platforms")
Cc: stable <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: Jiangshan Yi <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

2026-07-17 13:07:04 +02:00

..

8250_accent.c

…

8250_acorn.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

8250_aspeed_vuart.c

…

8250_bcm2835aux.c

…

8250_bcm7271.c

…

8250_boca.c

…

8250_ce4100.c

…

8250_core.c

serial: 8250: Add support for console flow control

2026-05-22 11:45:41 +02:00

8250_dfl.c

Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files)

2026-07-03 07:38:17 +02:00

8250_dma.c

serial: 8250: Fix TX deadlock when using DMA

2026-03-12 15:29:59 +01:00

8250_dw.c

Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files)

2026-07-03 07:38:17 +02:00

8250_dwlib.c

serial: 8250_dwlib: move DesignWare register definitions to header

2026-05-11 17:00:42 +02:00

8250_dwlib.h

serial: 8250_dw: build Renesas RZN1 CPR value from DW_UART_CPR_* definitions

2026-05-11 17:00:42 +02:00

8250_early.c

…

8250_em.c

Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files)

2026-07-03 07:38:17 +02:00

8250_exar_st16c554.c

…

8250_exar.c

…

8250_fintek.c

serial: 8250_fintek: Add support for F81214E

2026-03-30 17:36:09 +02:00

8250_fourport.c

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8250_fsl.c

…

8250_hp300.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

8250_hub6.c

…

8250_ingenic.c

…

8250_ioc3.c

…

8250_keba.c

Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files)

2026-07-03 07:38:17 +02:00

8250_loongson.c

Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files)

2026-07-03 07:38:17 +02:00

8250_lpc18xx.c

…

8250_lpss.c

…

8250_men_mcb.c

8250_men_mcb: drop unneeded MODULE_ALIAS

2026-01-16 14:25:05 +01:00

8250_mid.c

serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms

2026-07-17 13:07:04 +02:00

8250_mtk.c

serial: 8250_mtk: Add ACPI support

2026-05-11 16:55:18 +02:00

8250_ni.c

Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files)

2026-07-03 07:38:17 +02:00

8250_of.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

8250_omap.c

serial: 8250_omap: clear rx_running on zero-length DMA completes

2026-07-10 14:46:54 +02:00

8250_parisc.c

…

8250_pci1xxxx.c

…

8250_pci.c

serial: 8250_pci: Don't specify conflicting values to pci_device_id members

2026-06-12 11:55:41 +02:00

8250_pcilib.c

…

8250_pcilib.h

…

8250_pericom.c

…

8250_platform.c

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-21 20:03:00 -08:00

8250_pnp.c

…

8250_port.c

serial: 8250: Ignore flow control on suspend/resume with no_console_suspend

2026-07-10 14:47:30 +02:00

8250_pxa.c

…

8250_rsa.c

Merge tag 'tty-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2025-12-06 18:38:19 -08:00

8250_rt288x.c

…

8250_tegra.c

…

8250_uniphier.c

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8250.h

serial: 8250_dw: Ensure BUSY is deasserted

2026-03-12 15:34:29 +01:00

Kconfig

serial: 8250: loongson: Enable building on MIPS Loongson64

2026-03-30 17:36:20 +02:00

Makefile

Merge tag 'tty-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2025-12-06 18:38:19 -08:00

serial_cs.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00