CVE-2024-43889 (GCVE-0-2024-43889)

Vulnerability from cvelistv5 – Published: 2024-08-26 10:10 – Updated: 2025-11-03 22:06
VLAI?
Title
padata: Fix possible divide-by-0 panic in padata_mt_helper()
Summary
In the Linux kernel, the following vulnerability has been resolved: padata: Fix possible divide-by-0 panic in padata_mt_helper() We are hit with a not easily reproducible divide-by-0 panic in padata.c at bootup time. [ 10.017908] Oops: divide error: 0000 1 PREEMPT SMP NOPTI [ 10.017908] CPU: 26 PID: 2627 Comm: kworker/u1666:1 Not tainted 6.10.0-15.el10.x86_64 #1 [ 10.017908] Hardware name: Lenovo ThinkSystem SR950 [7X12CTO1WW]/[7X12CTO1WW], BIOS [PSE140J-2.30] 07/20/2021 [ 10.017908] Workqueue: events_unbound padata_mt_helper [ 10.017908] RIP: 0010:padata_mt_helper+0x39/0xb0 : [ 10.017963] Call Trace: [ 10.017968] <TASK> [ 10.018004] ? padata_mt_helper+0x39/0xb0 [ 10.018084] process_one_work+0x174/0x330 [ 10.018093] worker_thread+0x266/0x3a0 [ 10.018111] kthread+0xcf/0x100 [ 10.018124] ret_from_fork+0x31/0x50 [ 10.018138] ret_from_fork_asm+0x1a/0x30 [ 10.018147] </TASK> Looking at the padata_mt_helper() function, the only way a divide-by-0 panic can happen is when ps->chunk_size is 0. The way that chunk_size is initialized in padata_do_multithreaded(), chunk_size can be 0 when the min_chunk in the passed-in padata_mt_job structure is 0. Fix this divide-by-0 panic by making sure that chunk_size will be at least 1 no matter what the input parameters are.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 004ed42638f4428e70ead59d170f3d17ff761a0f , < ab8b397d5997d8c37610252528edc54bebf9f6d3 (git)
Affected: 004ed42638f4428e70ead59d170f3d17ff761a0f , < 8f5ffd2af7274853ff91d6cd62541191d9fbd10d (git)
Affected: 004ed42638f4428e70ead59d170f3d17ff761a0f , < a29cfcb848c31f22b4de6a531c3e1d68c9bfe09f (git)
Affected: 004ed42638f4428e70ead59d170f3d17ff761a0f , < 924f788c906dccaca30acab86c7124371e1d6f2c (git)
Affected: 004ed42638f4428e70ead59d170f3d17ff761a0f , < da0ffe84fcc1627a7dff82c80b823b94236af905 (git)
Affected: 004ed42638f4428e70ead59d170f3d17ff761a0f , < 6d45e1c948a8b7ed6ceddb14319af69424db730c (git)
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    Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.224 , ≤ 5.10.* (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.105 , ≤ 6.1.* (semver)
Unaffected: 6.6.46 , ≤ 6.6.* (semver)
Unaffected: 6.10.5 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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