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

net: sungem: fix probe error cleanup

gem_init_one() calls gem_remove_one() when register_netdev() fails.
gem_remove_one() unregisters and frees resources owned by the net_device,
including the DMA block, MMIO mapping, PCI regions, and the net_device
itself. gem_init_one() then falls through to its own cleanup labels and
frees the same resources again.

Keep the register_netdev() error path in gem_init_one(): clear drvdata so
PM/remove paths do not see a half-registered device, remove the NAPI
instance added during probe, and let the existing cleanup labels release
the resources once.

The issue was found by a local static-analysis checker for probe error
paths. The reported path was manually inspected before sending this fix.

Compile-tested with CONFIG_SUNGEM=y. Runtime testing was not performed
because no sungem hardware is available.

https://git.kernel.org/stable/c/331c99029a1cee1111f82f63d15b3cdebefbd341

https://git.kernel.org/stable/c/36dea2f639249460d13f6ca66b2a9064187cd34d

https://git.kernel.org/stable/c/a63eaf7605d1579cf3f551792e478cfaf5ac37d1

https://git.kernel.org/stable/c/b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9

https://git.kernel.org/stable/c/bc49e8746584564dba47d963d1916cc876fc6f6b

https://git.kernel.org/stable/c/f1d04fefb0c2a2de32d9cee22cdc2088be3758d1

https://git.kernel.org/stable/c/f3bd60b26814b7c3c57c629abb0857dfc76d214a

https://git.kernel.org/stable/c/fb73cdc50b6755e5c3a80a195b2708a39ada0230

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