Bug 2315195 (CVE-2024-46843) - CVE-2024-46843 kernel: scsi: ufs: core: Remove SCSI host only if added
Summary: CVE-2024-46843 kernel: scsi: ufs: core: Remove SCSI host only if added
Keywords:
Status: NEW
Alias: CVE-2024-46843
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2315263
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-09-27 13:22 UTC by OSIDB Bzimport
Modified: 2024-09-27 18:06 UTC (History)
4 users (show)

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Description OSIDB Bzimport 2024-09-27 13:22:32 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: ufs: core: Remove SCSI host only if added

If host tries to remove ufshcd driver from a UFS device it would cause a
kernel panic if ufshcd_async_scan fails during ufshcd_probe_hba before
adding a SCSI host with scsi_add_host and MCQ is enabled since SCSI host
has been defered after MCQ configuration introduced by commit 0cab4023ec7b
("scsi: ufs: core: Defer adding host to SCSI if MCQ is supported").

To guarantee that SCSI host is removed only if it has been added, set the
scsi_host_added flag to true after adding a SCSI host and check whether it
is set or not before removing it.
Comment 1 Robb Gatica 2024-09-27 14:54:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024092755-CVE-2024-46843-82c5@gregkh/T
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