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[v2,5.10.y,0/3] scsi: Backport fixes for CVE-2021-47182

Message ID 20241209170330.113179-1-kovalev@altlinux.org (mailing list archive)
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Series scsi: Backport fixes for CVE-2021-47182 | expand

Message

Vasiliy Kovalev Dec. 9, 2024, 5:03 p.m. UTC 
The patch titled "scsi: core: Fix scsi_mode_sense() buffer length handling"
addresses CVE-2021-47182, fixing the following issues in `scsi_mode_sense()`
buffer length handling:  

1. Incorrect handling of the allocation length field in the MODE SENSE(10)
   command, causing truncation of buffer lengths larger than 255 bytes.  

2. Memory corruption when handling small buffer lengths due to lack of proper
   validation.  

CVE announcement in linux-cve-announce:  
https://lore.kernel.org/linux-cve-announce/2024041032-CVE-2021-47182-377e@gregkh/  
Fixed versions:  
- Fixed in 5.15.5 with commit e15de347faf4  
- Fixed in 5.16 with commit 17b49bcbf835  

Official CVE entry:  
https://cve.org/CVERecord/?id=CVE-2021-47182

---
v2: To ensure consistency and completeness of the fixes, this backport
includes all 3 patches from the series [1].
In addition to the first patch that addresses the CVE, the second and
third patches are included, which prevent further regressions and align
with the fixes already backported and proposed for backporting [2] to
the stable 5.15 kernel.

[1] https://lore.kernel.org/all/20210820070255.682775-1-damien.lemoal@wdc.com/
[2] https://lore.kernel.org/all/20241209165340.112862-1-kovalev@altlinux.org/

[PATCH 5.10.y 1/3] scsi: core: Fix scsi_mode_sense() buffer length handling
[PATCH 5.10.y 2/3] scsi: core: Fix scsi_mode_select() buffer length handling
[PATCH 5.10.y 3/3] scsi: sd: Fix sd_do_mode_sense() buffer length handling