CVE-2022-49137

Summary

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

drm/amd/amdgpu/amdgpu_cs: fix refcount leak of a dma_fence obj

This issue takes place in an error path in amdgpu_cs_fence_to_handle_ioctl(). When info->in.what falls into default case, the function simply returns -EINVAL, forgetting to decrement the reference count of a dma_fence obj, which is bumped earlier by amdgpu_cs_get_fence(). This may result in reference count leaks.

Fix it by decreasing the refcount of specific object before returning the error code.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 72d77ddb2224ebc00648f4f78f8a9a259dccbdf7affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 4009f104b02b223d1a11d74b36b1cc083bc37028affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 927beb05aaa429c883cc0ec6adc48964b187e291affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 3edd8646cb7c11b57c90e026bda6f21076223f5baffected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < b6d1f7d97c81ebaf2cda9c4c943ee2e484fffdcfaffected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < bc2d5c0775c839e2b072884f4ee6a93ba410f107affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < dfced44f122c500004a48ecc8db516bb6a295a1baffected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux4.19.238 <= 4.19.*unaffected
LinuxLinux5.4.189 <= 5.4.*unaffected
LinuxLinux5.10.111 <= 5.10.*unaffected
LinuxLinux5.15.34 <= 5.15.*unaffected
LinuxLinux5.16.20 <= 5.16.*unaffected
LinuxLinux5.17.3 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References