In the Linux kernel, the following vulnerability has been resolved:
tracing: Fix sleeping function called from invalid context on RT kernel
When setting bootparams="trace_event=initcall:initcall_start tp_printk=1" in the cmdline, the output_printk() was called, and the spin_lock_irqsave() was called in the atomic and irq disable interrupt context suitation. On the PREEMPT_RT kernel, these locks are replaced with sleepable rt-spinlock, so the stack calltrace will be triggered. Fix it by raw_spin_lock_irqsave when PREEMPT_RT and "trace_event=initcall:initcall_start tp_printk=1" enabled.
BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1, name: swapper/0 preempt_count: 2, expected: 0 RCU nest depth: 0, expected: 0 Preemption disabled at: [<ffffffff8992303e>] try_to_wake_up+0x7e/0xba0 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.1-rt17+ #19 34c5812404187a875f32bee7977f7367f9679ea7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x60/0x8c dump_stack+0x10/0x12 __might_resched.cold+0x11d/0x155 rt_spin_lock+0x40/0x70 trace_event_buffer_commit+0x2fa/0x4c0 ? map_vsyscall+0x93/0x93 trace_event_raw_event_initcall_start+0xbe/0x110 ? perf_trace_initcall_finish+0x210/0x210 ? probe_sched_wakeup+0x34/0x40 ? ttwu_do_wakeup+0xda/0x310 ? trace_hardirqs_on+0x35/0x170 ? map_vsyscall+0x93/0x93 do_one_initcall+0x217/0x3c0 ? trace_event_raw_event_initcall_level+0x170/0x170 ? push_cpu_stop+0x400/0x400 ? cblist_init_generic+0x241/0x290 kernel_init_freeable+0x1ac/0x347 ? _raw_spin_unlock_irq+0x65/0x80 ? rest_init+0xf0/0xf0 kernel_init+0x1e/0x150 ret_from_fork+0x22/0x30 </TASK>
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernelUpgrade kernel-headersUpgrade kernel-livepatch-5.15.50-23.125Upgrade bpftool-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade python-perfUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-develUpgrade kernel-livepatch-5.10.126-117.518Upgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-livepatch-4.14.285-215.501 | May 21, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-azure-fipsUpgrade linux-hweUpgrade linuxUpgrade linux-azure-5.15Upgrade linux-aws-hweUpgrade linux-ibm-5.4Upgrade linux-ibmUpgrade linux-aws-fipsUpgrade linux-gcp-4.15Upgrade linux-gcp-5.4Upgrade linux-lowlatencyUpgrade linux-hwe-5.4Upgrade linux-gcp-fipsUpgrade linux-oracle-5.15Upgrade linux-gkeopUpgrade linux-iotUpgrade linux-kvmUpgrade linux-raspiUpgrade linux-aws-5.15Upgrade linux-hwe-5.15Upgrade linux-riscv-5.15Upgrade linux-gcp-5.15Upgrade linux-intel-iotgUpgrade linux-azure-5.4Upgrade linux-azure-fdeUpgrade linux-bluefieldUpgrade linux-realtimeUpgrade linux-fipsUpgrade linux-intel-iotg-5.15Upgrade linux-oracleUpgrade linux-lowlatency-hwe-5.15Upgrade linux-awsUpgrade linux-aws-5.4Upgrade linux-azure-4.15Upgrade linux-gkeUpgrade linux-oracle-5.4Upgrade linux-nvidiaUpgrade linux-azureUpgrade linux-gcpUpgrade linux-raspi-5.4 | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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