Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (powerz) Fix missing usb_kill_urb() on signal interrupt wait_for_completion_interruptible_timeout() returns -ERESTARTSYS when interrupted. This needs to abort the URB and return an error. No data has been received from the device so any reads from the transfer buffer are invalid. The original code tests !ret, which only catches the timeout case (0). On signal delivery (-ERESTARTSYS), !ret is false so the function skips usb_kill_urb() and falls through to read from the unfilled transfer buffer. Fix by capturing the return value into a long (matching the function return type) and handling signal (negative) and timeout (zero) cases with separate checks that both call usb_kill_urb() before returning.
Product status
4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before 8b51277eec433d4e724b273a5a5c64e8acfbe405
4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before b6cb07f02253bdefd2339e57eaa1428a7b28cd0f
4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before d64458784036f5818e22781254b6be299d52a19c
4381a36abdf1c5c0323c1c51f869dc000115eb20 (git) before b66437cb20a2d9ef201f40b675569f8ea7787c9f
6.7
Any version before 6.7
6.12.86 (semver)
6.18.27 (semver)
7.0.4 (semver)
7.1-rc1 (original_commit_for_fix)
References
git.kernel.org/...c/8b51277eec433d4e724b273a5a5c64e8acfbe405
git.kernel.org/...c/b6cb07f02253bdefd2339e57eaa1428a7b28cd0f
git.kernel.org/...c/d64458784036f5818e22781254b6be299d52a19c
git.kernel.org/...c/b66437cb20a2d9ef201f40b675569f8ea7787c9f