CVE-2024-50081: blk-mq: setup queue ->tag_set before initializing hctx
First published: Tue Oct 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: blk-mq: setup queue ->tag_set before initializing hctx Commit 7b815817aa58 ("blk-mq: add helper for checking if one CPU is mapped to specified hctx") needs to check queue mapping via tag set in hctx's cpuhp handler. However, q->tag_set may not be setup yet when the cpuhp handler is enabled, then kernel oops is triggered. Fix the issue by setup queue tag_set before initializing hctx.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.10<6.11.5 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 |
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Reference Links
- https://git.kernel.org/stable/c/d28b256db525d9432bc3eb2c8d83f7d3f5e1cc87
- https://git.kernel.org/stable/c/c25c0c9035bb8b28c844dfddeda7b8bdbcfcae95
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50081
- https://nvd.nist.gov/vuln/detail/CVE-2024-50081
- https://launchpad.net/bugs/cve/CVE-2024-50081
- https://security-tracker.debian.org/tracker/CVE-2024-50081
- https://ubuntu.com/security/CVE-2024-50081
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