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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2023-53176

serial: 8250: Reinit port->pm on port specific driver unbind

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Reinit port->pm on port specific driver unbind When we unbind a serial port hardware specific 8250 driver, the generic serial8250 driver takes over the port. After that we see an oops about 10 seconds later. This can produce the following at least on some TI SoCs: Unhandled fault: imprecise external abort (0x1406) Internal error: : 1406 [#1] SMP ARM Turns out that we may still have the serial port hardware specific driver port->pm in use, and serial8250_pm() tries to call it after the port specific driver is gone: serial8250_pm [8250_base] from uart_change_pm+0x54/0x8c [serial_base] uart_change_pm [serial_base] from uart_hangup+0x154/0x198 [serial_base] uart_hangup [serial_base] from __tty_hangup.part.0+0x328/0x37c __tty_hangup.part.0 from disassociate_ctty+0x154/0x20c disassociate_ctty from do_exit+0x744/0xaac do_exit from do_group_exit+0x40/0x8c do_group_exit from __wake_up_parent+0x0/0x1c Let's fix the issue by calling serial8250_set_defaults() in serial8250_unregister_port(). This will set the port back to using the serial8250 default functions, and sets the port->pm to point to serial8250_pm.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c161afe9759ddcc174d08e7c4f683d08ac9ba86f to < 490bf37eaabb0a857ed1ae8e75d8854e41662f1caffected
  • c161afe9759ddcc174d08e7c4f683d08ac9ba86f to < c9e080c3005fd183c56ff8f4d75edb5da0765d2caffected
  • c161afe9759ddcc174d08e7c4f683d08ac9ba86f to < d5cd2928d31042a7c0a01464f9a8d95be736421daffected
  • c161afe9759ddcc174d08e7c4f683d08ac9ba86f to < 2c86a1305c1406f45ea780d06953c484ea1d9e6eaffected
  • c161afe9759ddcc174d08e7c4f683d08ac9ba86f to < 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41affected
  • c161afe9759ddcc174d08e7c4f683d08ac9ba86f to < af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872affected
  • c161afe9759ddcc174d08e7c4f683d08ac9ba86f to < 8e596aed5f2f98cf3e6e98d6fe1d689f4a319308affected
  • c161afe9759ddcc174d08e7c4f683d08ac9ba86f to < 04e82793f068d2f0ffe62fcea03d007a8cdc16a7affected

Linux Linux

Default version status: affected

  • 2.6.37affected
  • 0 to < 2.6.37unaffected
  • 4.14.316 to ≤ 4.14.*unaffected
  • 4.19.284 to ≤ 4.19.*unaffected
  • 5.4.244 to ≤ 5.4.*unaffected
  • 5.10.181 to ≤ 5.10.*unaffected
  • 5.15.113 to ≤ 5.15.*unaffected
  • 6.1.30 to ≤ 6.1.*unaffected
  • 6.3.4 to ≤ 6.3.*unaffected
  • 6.4 to ≤ *unaffected

References