Riskcovery

CVE-2024-26587

net: netdevsim: don't try to destroy PHC on VFs

State
Published
Severity
Not scored
Published
Feb 22, 2024
Updated
May 11, 2026
Reserved
Feb 19, 2024

Read the record on cve.org

Description

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

net: netdevsim: don't try to destroy PHC on VFs

PHC gets initialized in nsim_init_netdevsim(), which is only called if (nsim_dev_port_is_pf()).

Create a counterpart of nsim_init_netdevsim() and move the mock_phc_destroy() there.

This fixes a crash trying to destroy netdevsim with VFs instantiated, as caught by running the devlink.sh test:

BUG: kernel NULL pointer dereference, address: 00000000000000b8 RIP: 0010:mock_phc_destroy+0xd/0x30 Call Trace: <TASK> nsim_destroy+0x4a/0x70 [netdevsim] __nsim_dev_port_del+0x47/0x70 [netdevsim] nsim_dev_reload_destroy+0x105/0x120 [netdevsim] nsim_drv_remove+0x2f/0xb0 [netdevsim] device_release_driver_internal+0x1a1/0x210 bus_remove_device+0xd5/0x120 device_del+0x159/0x490 device_unregister+0x12/0x30 del_device_store+0x11a/0x1a0 [netdevsim] kernfs_fop_write_iter+0x130/0x1d0 vfs_write+0x30b/0x4b0 ksys_write+0x69/0xf0 do_syscall_64+0xcc/0x1e0 entry_SYSCALL_64_after_hwframe+0x6f/0x77

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • b63e78fca889e07931ec8f259701718a24e5052e to before 08aca65997fb6f233066883b1f1e653bcb1f26caAffected
  • b63e78fca889e07931ec8f259701718a24e5052e to before c5068e442eed063d2f1658e6b6d3c1c6fcf1e588Affected
  • b63e78fca889e07931ec8f259701718a24e5052e to before ea937f77208323d35ffe2f8d8fc81b00118bfcdaAffected
LinuxLinux
  • 6.6Affected
  • before 6.6Not affected
  • 6.6.14 through 6.6.*Not affected
  • 6.7.2 through 6.7.*Not affected
  • 6.8 and laterNot affected

References

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