CVE-2022-50672

Summary

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

mailbox: zynq-ipi: fix error handling while device_register() fails

If device_register() fails, it has two issues:

  1. The name allocated by dev_set_name() is leaked.
  2. The parent of device is not NULL, device_unregister() is called in zynqmp_ipi_free_mboxes(), it will lead a kernel crash because of removing not added device.

Call put_device() to give up the reference, so the name is freed in kobject_cleanup(). Add device registered check in zynqmp_ipi_free_mboxes() to avoid null-ptr-deref.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4981b82ba2ff87df6a711fcd7a233c615df5fc79 < b3a5c76f61e2b380e29dfc6705854ca1ee85501daffected
LinuxLinux4981b82ba2ff87df6a711fcd7a233c615df5fc79 < a39b4de0804f9fe0ae911b359ffd4afe7d9d933baffected
LinuxLinux4981b82ba2ff87df6a711fcd7a233c615df5fc79 < 4f05d8e2fb3ab702c2633a74571e1b31cb579985affected
LinuxLinux4981b82ba2ff87df6a711fcd7a233c615df5fc79 < f2d63cefc012cafe1b7651bbf3302f8bcd8bea4aaffected
LinuxLinux4981b82ba2ff87df6a711fcd7a233c615df5fc79 < 3fcf079958c00d83c51e4f250abf2c77fe9cc1b9affected
LinuxLinux4981b82ba2ff87df6a711fcd7a233c615df5fc79 < a6792a0cdef0b1c2d77920246283a72537e60e94affected
LinuxLinux5.1affected
LinuxLinux0 < 5.1unaffected
LinuxLinux5.4.229 <= 5.4.*unaffected
LinuxLinux5.10.163 <= 5.10.*unaffected
LinuxLinux5.15.86 <= 5.15.*unaffected
LinuxLinux6.0.16 <= 6.0.*unaffected
LinuxLinux6.1.2 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

References