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CVE PROGRAM SOURCE RECORDUnscored

CVE-2021-47567

powerpc/32: Fix hardlockup on vmap stack overflow

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct") a vmap stack overflow results in a hard lockup. This is because emergency_ctx is still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by using a physical address instead.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c118c7303ad528be8ff2aea8cd1ee15452c763f0 to < dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7affected
  • c118c7303ad528be8ff2aea8cd1ee15452c763f0 to < c4e3ff8b8b1d54f0c755670174c453b06e17114baffected
  • c118c7303ad528be8ff2aea8cd1ee15452c763f0 to < 5bb60ea611db1e04814426ed4bd1c95d1487678eaffected
  • 3b234b4a6651ed6bdca94553aa0038fc7ded9271affected
  • 5.9.5 to < 5.10affected

Linux Linux

Default version status: affected

  • 5.10affected
  • 0 to < 5.10unaffected
  • 5.10.83 to ≤ 5.10.*unaffected
  • 5.15.6 to ≤ 5.15.*unaffected
  • 5.16 to ≤ *unaffected

References