[5.10] [Bugfix] Bug fix for net/tls support · Pull Request !12106 · anolis/cloud-kernel

bugzilla: https://bugzilla.openanolis.cn/show_bug.cgi?id=42042

Issue: When using `splice()` to read data from a kTLS socket on the RX side, `tls_sw_splice_read()` has two bugs:

1. It fails to check `rx_list`, and partially-consumed records are not returned to `rx_list`, causing `splice()` to skip or re-read data (fixed by e062fe99cccd).

2. It advances the read pointer by the requested length (`len`) instead of the actual number of bytes spliced into the pipe (`copied`), leading to silent data loss under pipe backpressure (fixed by 7e7be31bfdb0).

**Symptom:** Data relayed through kTLS + `splice()` does not match the original content (though the length may appear correct), whereas the regular read/write copy path works as expected.

These two commits are from:
- https://github.com/torvalds/linux/commit/e062fe99cccd9ff9f232e593d163ecabd244fae8
- https://github.com/torvalds/linux/commit/7e7be31bfdb066c1c780dcd6b1224078fc54063f

They were fixed in kernel versions 5.16 and 7.1 respectively, but neither has been backported to the 5.19 cloud-linux kernel.

类型	指派人员	状态
审查	xunlei Dust.Li Philo Lu Wen Gu David Guixin Liu	已完成 (0/0人)
测试	小龙已测试通过	已完成 (1/1人)

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