CVE-2024-57985

EPSS 0.11%
Veröffentlicht 27.02.2025 02:15:11
Zuletzt bearbeitet 23.10.2025 17:56:25
Quelle 416baaa9-dc9f-4396-8d5f-8c081f
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firmware: qcom: scm: Cleanup global '__scm' on probe failures

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

firmware: qcom: scm: Cleanup global '__scm' on probe failures

If SCM driver fails the probe, it should not leave global '__scm'
variable assigned, because external users of this driver will assume the
probe finished successfully.  For example TZMEM parts ('__scm->mempool')
are initialized later in the probe, but users of it (__scm_smc_call())
rely on the '__scm' variable.

This fixes theoretical NULL pointer exception, triggered via introducing
probe deferral in SCM driver with call trace:

  qcom_tzmem_alloc+0x70/0x1ac (P)
  qcom_tzmem_alloc+0x64/0x1ac (L)
  qcom_scm_assign_mem+0x78/0x194
  qcom_rmtfs_mem_probe+0x2d4/0x38c
  platform_probe+0x68/0xc8