CVE-2022-50868

Summary

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

hwrng: amd - Fix PCI device refcount leak

for_each_pci_dev() is implemented by pci_get_device(). The comment of pci_get_device() says that it will increase the reference count for the returned pci_dev and also decrease the reference count for the input pci_dev @from if it is not NULL.

If we break for_each_pci_dev() loop with pdev not NULL, we need to call pci_dev_put() to decrease the reference count. Add the missing pci_dev_put() for the normal and error path.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < f1c97f72ffd504f49882774e2ab689d982dc7afcaffected
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < 526c316948819d3ecd2bb20fe5e2580c51a1b760affected
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < e246f5eff26055bdcb61a2cc99c50af72a19680faffected
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < 1199f8e02941b326c60ab71a63002b7c80e38212affected
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < 5998e5c30e839f73e62cb29e0d9617b0d16ccba3affected
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < 2b79a5e560779b35e1164d57ae35c48b43373082affected
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < cb348c7908631dd9f60083a0a1542eab055d3edfaffected
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < 2e10ecd012ae2b2a374b34f307e9bc1e6096c03daffected
LinuxLinux96d63c0297ccfd6d9059c614b3f5555d9441a2b3 < ecadb5b0111ea19fc7c240bb25d424a94471eb7daffected
LinuxLinux2.6.18affected
LinuxLinux0 < 2.6.18unaffected
LinuxLinux4.9.337 <= 4.9.*unaffected
LinuxLinux4.14.303 <= 4.14.*unaffected
LinuxLinux4.19.270 <= 4.19.*unaffected
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