In the Linux kernel, the following vulnerability has been resolved: i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl While fuzzing with Syzkaller, a persistent `schedule_timeout: wrong timeout value` warning was observed, accompanied by SMBus controller state machine corruption. The I2C_TIMEOUT ioctl accepts a user-provided timeout in multiples of 10 ms. The user argument is checked against INT_MAX, but it is subsequently multiplied by 10 before being passed to msecs_to_jiffies(). A malicious user can pass a large value (e.g., 429496729) that passes the `arg > INT_MAX` check but overflows when multiplied by 10. This results in a truncated 32-bit unsigned value that bypasses the internal `(int)m < 0` check in `msecs_to_jiffies()`. The truncated value is then assigned to `client->adapter->timeout` (a signed 32-bit int), which is reinterpreted as a negative number. When passed to wait_for_completion_timeout(), this negative value undergoes sign extension to a 64-bit unsigned long, triggering the `schedule_timeout` warning and causing premature returns. This leaves the SMBus state machine in an unrecoverable state, constituting a local Denial of Service (DoS). Fix this by bounding the user argument to `INT_MAX / 10`. [wsa: move the comment as well]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-190
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd39deefc00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd37035df00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd340f0c0c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3842b7080> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd39deee880> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3842b4f00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3840e7480> | Operating System |
| linux | linux_kernel | 2.6.29 | <built-in method update of dict object at 0x7fd3842b7f00> | Operating System |
| linux | linux_kernel | 2.6.29 | <built-in method update of dict object at 0x7fd3842b6b00> | Operating System |
| linux | linux_kernel | 2.6.29 | <built-in method update of dict object at 0x7fd39deee780> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd340f0ce00> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd37035fe40> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.29:-:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.29:rc7:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.29:rc8:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* |