cve/2024/CVE-2024-57891.md

### [CVE-2024-57891](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-57891)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=0e7ffff1b8117b05635c87d3c9099f6aa9c9b689%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=6.12%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=blue)

### Description

In the Linux kernel, the following vulnerability has been resolved:sched_ext: Fix invalid irq restore in scx_ops_bypass()While adding outer irqsave/restore locking, 0e7ffff1b811 ("scx: Fix racinessin scx_ops_bypass()") forgot to convert an inner rq_unlock_irqrestore() torq_unlock() which could re-enable IRQ prematurely leading to the followingwarning:  raw_local_irq_restore() called with IRQs enabled  WARNING: CPU: 1 PID: 96 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x30/0x40  ...  Sched_ext: create_dsq (enabling)  pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)  pc : warn_bogus_irq_restore+0x30/0x40  lr : warn_bogus_irq_restore+0x30/0x40  ...  Call trace:   warn_bogus_irq_restore+0x30/0x40 (P)   warn_bogus_irq_restore+0x30/0x40 (L)   scx_ops_bypass+0x224/0x3b8   scx_ops_enable.isra.0+0x2c8/0xaa8   bpf_scx_reg+0x18/0x30  ...  irq event stamp: 33739  hardirqs last  enabled at (33739): [<ffff8000800b699c>] scx_ops_bypass+0x174/0x3b8  hardirqs last disabled at (33738): [<ffff800080d48ad4>] _raw_spin_lock_irqsave+0xb4/0xd8Drop the stray _irqrestore().

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds