idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()
Summary
| CVE | CVE-2026-64162 |
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| State | PUBLISHED |
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| Assigner | Linux |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2026-07-19 16:17:58 UTC |
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| Updated | 2026-07-19 16:17:58 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()
In idpf_ptp_init(), read_dev_clk_lock is initialized after
ptp_schedule_worker() had already been called (and after
idpf_ptp_settime64() could reach the lock). The PTP aux worker
fires immediately upon scheduling and can call into
idpf_ptp_read_src_clk_reg_direct(), which takes
spin_lock(&ptp->read_dev_clk_lock) on an uninitialized lock, triggering
the lockdep "non-static key" warning:
[12973.796587] idpf 0000:83:00.0: Device HW Reset initiated
[12974.094507] INFO: trying to register non-static key.
...
[12974.097208] Call Trace:
[12974.097213] <TASK>
[12974.097218] dump_stack_lvl+0x93/0xe0
[12974.097234] register_lock_class+0x4c4/0x4e0
[12974.097249] ? __lock_acquire+0x427/0x2290
[12974.097259] __lock_acquire+0x98/0x2290
[12974.097272] lock_acquire+0xc6/0x310
[12974.097281] ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]
[12974.097311] ? lockdep_hardirqs_on_prepare+0xde/0x190
[12974.097318] ? finish_task_switch.isra.0+0xd2/0x350
[12974.097330] ? __pfx_ptp_aux_kworker+0x10/0x10 [ptp]
[12974.097343] _raw_spin_lock+0x30/0x40
[12974.097353] ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]
[12974.097373] idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]
[12974.097391] ? kthread_worker_fn+0x88/0x3d0
[12974.097404] ? kthread_worker_fn+0x4e/0x3d0
[12974.097411] idpf_ptp_update_cached_phctime+0x26/0x120 [idpf]
[12974.097428] ? _raw_spin_unlock_irq+0x28/0x50
[12974.097436] idpf_ptp_do_aux_work+0x15/0x20 [idpf]
[12974.097454] ptp_aux_kworker+0x20/0x40 [ptp]
[12974.097464] kthread_worker_fn+0xd5/0x3d0
[12974.097474] ? __pfx_kthread_worker_fn+0x10/0x10
[12974.097482] kthread+0xf4/0x130
[12974.097489] ? __pfx_kthread+0x10/0x10
[12974.097498] ret_from_fork+0x32c/0x410
[12974.097512] ? __pfx_kthread+0x10/0x10
[12974.097519] ret_from_fork_asm+0x1a/0x30
[12974.097540] </TASK>
Move the call to spin_lock_init() up a bit to make sure read_dev_clk_lock
is not touched before it's been initialized. |
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Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 5cb8805d2366b20ee4d7afff586d8acf17649330 eb5991d4c8ba2e8153dfcda3e66a9608377b7dce git |
Not specified |
| CNA |
Linux |
Linux |
affected 5cb8805d2366b20ee4d7afff586d8acf17649330 3122d70b7c0101d897fb795658a7b93f854935f2 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5cb8805d2366b20ee4d7afff586d8acf17649330 da4f76b6a84ede14a71282ef841768299ead0221 git |
Not specified |
| CNA |
Linux |
Linux |
affected 6.16 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.16 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.34 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.0.11 7.0.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/da4f76b6a84ede14a71282ef841768299ead0221 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/3122d70b7c0101d897fb795658a7b93f854935f2 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/eb5991d4c8ba2e8153dfcda3e66a9608377b7dce |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.
