- Vulnerability/
- CVE-2024-27005
CVE-2024-27005: interconnect: Don't access req_list while it's being manipulated
First published: Wed May 01 2024(Updated: )
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")
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | <=6.1.106-3<=6.1.112-1 | 5.10.223-1 5.10.226-1 6.10.11-1 6.11.2-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://git.kernel.org/stable/c/4c65507121ea8e0b47fae6d2049c8688390d46b6
- https://git.kernel.org/stable/c/d0d04efa2e367921654b5106cc5c05e3757c2b42
- https://git.kernel.org/stable/c/de1bf25b6d771abdb52d43546cf57ad775fb68a1
- https://launchpad.net/bugs/cve/CVE-2024-27005
- https://git.kernel.org/linus/de1bf25b6d771abdb52d43546cf57ad775fb68a1
- https://security-tracker.debian.org/tracker/CVE-2024-27005
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27005
- https://nvd.nist.gov/vuln/detail/CVE-2024-27005
- https://ubuntu.com/security/CVE-2024-27005
- agent/title
- agent/type
- agent/severity
- collector/nvd-api
- source/NVD
- collector/nvd-cve
- collector/launchpad-cve
- source/Launchpad
- agent/remedy
- agent/first-publish-date
- agent/author
- agent/description
- agent/references
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/tags
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- package-manager/debian