Linux Kernel Daily: Lifetime Hardening and Resume Reliability
Today's merges focus on lifetime and memory safety across DMA, timers, and input, plus resume and platform stability fixes. The main pattern is closing use-after-free, disclosure, and teardown races ahead of the 7.3 release candidate.
Duration: PT2M15S
Episode overview
This episode is a short developer briefing from Linux Kernel Daily.
It explains recent repository work in plain language.
- Show: Linux Kernel Daily
- Published: 2026-09-21T06:00:06Z
- Audio duration: PT2M15S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning, it's Monday, September 21st, 2026.
Today's activity is dominated by lifetime and memory-safety hardening, with core fixes to stop use-after-free crashes, memory disclosure, and failed resume.
First, object lifetime. A D-M-A engine bundle fixes a reference-count underflow in the channel release path, fixes a use-after-free when releasing channels, and waits for R-C-U readers before freeing devices. That matters because faulty teardown can corrupt memory or crash on unload. The same pattern shows up in…
Second, input security. An input bundle zero-initializes force-feedback and absolute-axis structures before copying from user space, closing a kernel stack disclosure. It also clamps a device-supplied H-I-D report size before copying to stop a buffer overflow, and fixes an out-of-bounds read in multi-chunk S-M-Bus…
Third, resume and platform stability. A Q-R-T-R networking fix resends the hello handshake on M-H-I resume, fixing WiFi 7 timeouts after suspend on Qualcomm systems, validated across ten suspend-resume cycles. On x86, a problematic microcode version is now rejected on Granite Rapids, and FRED systems reconstruct…
What to watch: test suspend-resume on wireless…