Description (CNA)
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]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d before e9ffd5f5050fbb199d270a85614cd27ebed6fbac; affected cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d before 0b88ecfbc9dc33b4db8836c37b50cf174e6c0691; affected cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d before 943e318eedbeaeea08ece3f5dd44c982f4ed2ef5; affected cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d before aa6ef734016912653a909477fb30aeb66c98b3a2; affected cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d before ff02add34ffd03449b8115904ebe2ec4fed022d4; affected cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d before ffbcf31f032eb454ebfd29309f51366fe57f4ac4; affected cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d before 4576621dc6577f21a032acfd16c3ad61907a5ea7; affected cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d before 617eb7c0961a8dfcfc811844a6396e406b2923ea |
| Linux / Linux | affected 2.6.29; unaffected 0 before 2.6.29; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.94 through 6.12.*; unaffected 6.18.36 through 6.18.*; unaffected 7.0.13 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e9ffd5f5050fbb199d270a85614cd27ebed6fbac
- https://git.kernel.org/stable/c/0b88ecfbc9dc33b4db8836c37b50cf174e6c0691
- https://git.kernel.org/stable/c/943e318eedbeaeea08ece3f5dd44c982f4ed2ef5
- https://git.kernel.org/stable/c/aa6ef734016912653a909477fb30aeb66c98b3a2
- https://git.kernel.org/stable/c/ff02add34ffd03449b8115904ebe2ec4fed022d4
- https://git.kernel.org/stable/c/ffbcf31f032eb454ebfd29309f51366fe57f4ac4
- https://git.kernel.org/stable/c/4576621dc6577f21a032acfd16c3ad61907a5ea7
- https://git.kernel.org/stable/c/617eb7c0961a8dfcfc811844a6396e406b2923ea
ADP enrichment
No English description supplied.