CVE-2024-49976

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Source
https://cve.org/CVERecord?id=CVE-2024-49976
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49976.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-49976
Downstream
Related
Published
2024-10-21T18:02:23Z
Modified
2026-05-18T05:56:09Z
Summary
tracing/timerlat: Drop interface_lock in stop_kthread()
Details

In the Linux kernel, the following vulnerability has been resolved:

tracing/timerlat: Drop interface_lock in stop_kthread()

stop_kthread() is the offline callback for "trace/osnoise:online", since commit 5bfbcd1ee57b ("tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()"), the following ABBA deadlock scenario is introduced:

T1 | T2 [BP] | T3 [AP] osnoise_hotplug_workfn() | work_for_cpu_fn() | cpuhp_thread_fun() | _cpu_down() | osnoise_cpu_die() mutex_lock(&interface_lock) | | stop_kthread() | cpus_write_lock() | mutex_lock(&interface_lock) cpus_read_lock() | cpuhp_kick_ap() |

As the interface_lock here in just for protecting the "kthread" field of the osn_var, use xchg() instead to fix this issue. Also use for_each_online_cpu() back in stop_per_cpu_kthreads() as it can take cpu_read_lock() again.

Database specific 
{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49976.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
b4fdabffae14cca2c80d99bd81f3f27239ac7f5e
Fixed
a4a05ceffe8fad68b45de38fe2311bda619e76e2
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
4679272d5252720746fd9c5465352cbc5665f230
Fixed
09cb44cc3d3df7ade2cebc939d6257a2fa8afc7a
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
5bfbcd1ee57b607fd29e4645c7f350dd385dd9ad
Fixed
db8571a9a098086608c11a15856ff585789e67e8
Fixed
b484a02c9cedf8703eff8f0756f94618004bd165

Affected versions

v6.*
v6.10.10
v6.10.11
v6.10.12
v6.10.13
v6.6.51
v6.6.52
v6.6.53
v6.6.54

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49976.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.6.55
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.10.14
Type
ECOSYSTEM
Events
Introduced
6.11.0
Fixed
6.11.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49976.json"