CVE-2023-52811 (GCVE-0-2023-52811)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-01-05 10:17
VLAI?
Title
scsi: ibmvfc: Remove BUG_ON in the case of an empty event pool
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: ibmvfc: Remove BUG_ON in the case of an empty event pool In practice the driver should never send more commands than are allocated to a queue's event pool. In the unlikely event that this happens, the code asserts a BUG_ON, and in the case that the kernel is not configured to crash on panic returns a junk event pointer from the empty event list causing things to spiral from there. This BUG_ON is a historical artifact of the ibmvfc driver first being upstreamed, and it is well known now that the use of BUG_ON is bad practice except in the most unrecoverable scenario. There is nothing about this scenario that prevents the driver from recovering and carrying on. Remove the BUG_ON in question from ibmvfc_get_event() and return a NULL pointer in the case of an empty event pool. Update all call sites to ibmvfc_get_event() to check for a NULL pointer and perfrom the appropriate failure or recovery action.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 , < e1d1f79b1929dce470a5dc9281c574cd58e8c6c0 (git)
Affected: 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 , < 88984ec4792766df5a9de7a2ff2b5f281f94c7d4 (git)
Affected: 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 , < d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8 (git)
Affected: 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 , < 8bbe784c2ff28d56ca0c548aaf3e584edc77052d (git)
Affected: 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 , < b39f2d10b86d0af353ea339e5815820026bca48f (git)
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    Linux Linux Affected: 2.6.27
Unaffected: 0 , < 2.6.27 (semver)
Unaffected: 5.15.140 , ≤ 5.15.* (semver)
Unaffected: 6.1.64 , ≤ 6.1.* (semver)
Unaffected: 6.5.13 , ≤ 6.5.* (semver)
Unaffected: 6.6.3 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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