CVE-2023-54220
Description
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Fix oops for port->pm on uart_change_pm() Unloading a hardware specific 8250 driver can produce error "Unable to handle kernel paging request at virtual address" about ten seconds after unloading the driver. This happens on uart_hangup() calling uart_change_pm(). Turns out commit 04e82793f068 ("serial: 8250: Reinit port->pm on port specific driver unbind") was only a partial fix. If the hardware specific driver has initialized port->pm function, we need to clear port->pm too. Just reinitializing port->ops does not do this. Otherwise serial8250_pm() will call port->pm() instead of serial8250_do_pm().
How to fix
- Linux Linux66f3e55960698c874b0598277913b478ecd29573, 720a297b334e85d34099e83d1f375b92c3efedd6, b653289ca6460a6552c8590b75dfa84a0140a46b, bd70d0b28010d560a8be96b44fea86fe2ba016ae, 18e27df4f2b4e257c317ba8076f31a888f6cc64b, 0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c, 375806616f8c772c33d40e112530887b37c1a816, dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534, 4.14.324, 4.19.293, 5.4.255, 5.10.192, 5.15.128, 6.1.47, 6.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 490bf37eaabb0a857ed1ae8e75d8854e41662f1c ≤ v < 66f3e55960698c874b0598277913b478ecd29573, c9e080c3005fd183c56ff8f4d75edb5da0765d2c ≤ v < 720a297b334e85d34099e83d1f375b92c3efedd6, d5cd2928d31042a7c0a01464f9a8d95be736421d ≤ v < b653289ca6460a6552c8590b75dfa84a0140a46b, 2c86a1305c1406f45ea780d06953c484ea1d9e6e ≤ v < bd70d0b28010d560a8be96b44fea86fe2ba016ae, 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41 ≤ v < 18e27df4f2b4e257c317ba8076f31a888f6cc64b, af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872 ≤ v < 0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c, 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 ≤ v < 375806616f8c772c33d40e112530887b37c1a816, 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 ≤ v < dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534, 8e596aed5f2f98cf3e6e98d6fe1d689f4a319308, 4.14.316 ≤ v < 4.14.324, 4.19.284 ≤ v < 4.19.293, 5.4.244 ≤ v < 5.4.255, 5.10.181 ≤ v < 5.10.192, 5.15.113 ≤ v < 5.15.128, 6.1.30 ≤ v < 6.1.47, 6.3.4 ≤ v < 6.4, 6.4 | 66f3e55960698c874b0598277913b478ecd29573, 720a297b334e85d34099e83d1f375b92c3efedd6, b653289ca6460a6552c8590b75dfa84a0140a46b, bd70d0b28010d560a8be96b44fea86fe2ba016ae, 18e27df4f2b4e257c317ba8076f31a888f6cc64b, 0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c, 375806616f8c772c33d40e112530887b37c1a816, dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534, 4.14.324, 4.19.293, 5.4.255, 5.10.192, 5.15.128, 6.1.47, 6.4 |
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