CVE-2024-27005 (GCVE-0-2024-27005)
Vulnerability from cvelistv5
Published
2024-05-01 05:28
Modified
2026-05-23 15:41
Severity ?
6.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: interconnect: Don't access req_list while it's being manipulated The icc_lock mutex was split into separate icc_lock and icc_bw_lock mutexes in [1] to avoid lockdep splats. However, this didn't adequately protect access to icc_node::req_list. The icc_set_bw() function will eventually iterate over req_list while only holding icc_bw_lock, but req_list can be modified while only holding icc_lock. This causes races between icc_set_bw(), of_icc_get(), and icc_put(). Example A: CPU0 CPU1 ---- ---- icc_set_bw(path_a) mutex_lock(&icc_bw_lock); icc_put(path_b) mutex_lock(&icc_lock); aggregate_requests() hlist_for_each_entry(r, ... hlist_del(... <r = invalid pointer> Example B: CPU0 CPU1 ---- ---- icc_set_bw(path_a) mutex_lock(&icc_bw_lock); path_b = of_icc_get() of_icc_get_by_index() mutex_lock(&icc_lock); path_find() path_init() aggregate_requests() hlist_for_each_entry(r, ... hlist_add_head(... <r = invalid pointer> Fix this by ensuring icc_bw_lock is always held before manipulating icc_node::req_list. The additional places icc_bw_lock is held don't perform any memory allocations, so we should still be safe from the original lockdep splats that motivated the separate locks. [1] commit af42269c3523 ("interconnect: Fix locking for runpm vs reclaim")
References
Impacted products
Vendor Product Version
Linux Linux Version: 9be2957f014d91088db1eb5dd09d9a03d7184dce
Version: ee42bfc791aa3cd78e29046f26a09d189beb3efb
Version: af42269c3523492d71ebbe11fefae2653e9cdc78
Version: af42269c3523492d71ebbe11fefae2653e9cdc78
Version: af42269c3523492d71ebbe11fefae2653e9cdc78
Version: 2f3a124696d43de3c837f87a9f767c56ee86cf2a
Version: 5.15.133   ≤
Version: 6.1.55   ≤
Version: 6.5.5   ≤
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