CVE-2024-38597
Published: June 21, 2024Last modified: June 21, 2024
Description
In the Linux kernel, the following vulnerability has been resolved: eth: sungem: remove .ndo_poll_controller to avoid deadlocks Erhard reports netpoll warnings from sungem: netpoll_send_skb_on_dev(): eth0 enabled interrupts in poll (gem_start_xmit+0x0/0x398) WARNING: CPU: 1 PID: 1 at net/core/netpoll.c:370 netpoll_send_skb+0x1fc/0x20c gem_poll_controller() disables interrupts, which may sleep. We can't sleep in netpoll, it has interrupts disabled completely. Strangely, gem_poll_controller() doesn't even poll the completions, and instead acts as if an interrupt has fired so it just schedules NAPI and exits. None of this has been necessary for years, since netpoll invokes NAPI directly.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.97-r0) |
| Stream | linux-lts | Fixed (6.6.58-r0) |
References
- https://git.kernel.org/stable/c/476adb3bbbd7886e8251d3b9ce2d3c3e680f35d6
- https://git.kernel.org/stable/c/5de5aeb98f9a000adb0db184e32765e4815d860b
- https://git.kernel.org/stable/c/6400d205fbbcbcf9b8510157e1f379c1d7e2e937
- https://git.kernel.org/stable/c/ac0a230f719b02432d8c7eba7615ebd691da86f4
- https://git.kernel.org/stable/c/e22b23f5888a065d084e87db1eec639c445e677f
- https://git.kernel.org/stable/c/faf94f1eb8a34b2c31b2042051ef36f63420ecce
- https://git.kernel.org/stable/c/fbeeb55dbb33d562149c57e794f06b7414e44289