eth: sungem: remove .ndo_poll_controller to avoid deadlocks
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.1
References 7
git.kernel.org
- stable/c/e22b23f5888a065d084e87db1eec639c445e677f
- stable/c/fbeeb55dbb33d562149c57e794f06b7414e44289
- stable/c/476adb3bbbd7886e8251d3b9ce2d3c3e680f35d6
- stable/c/5de5aeb98f9a000adb0db184e32765e4815d860b
- stable/c/faf94f1eb8a34b2c31b2042051ef36f63420ecce
- stable/c/6400d205fbbcbcf9b8510157e1f379c1d7e2e937
- stable/c/ac0a230f719b02432d8c7eba7615ebd691da86f4