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igb: Fix potential invalid memory access in igb_init_module()

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[ Upstream commit 0566f83d206c7a864abcd741fe39d6e0ae5eef29 ]

The pci_register_driver() can fail and when this happened, the dca_notifier
needs to be unregistered, otherwise the dca_notifier can be called when
igb fails to install, resulting to invalid memory access.

Fixes: bbd98fe48a ("igb: Fix DCA errors and do not use context index for 82576")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yuan Can 2024-10-23 20:10:48 +08:00 • committed by Greg Kroah-Hartman
parent 5cabe42ead
commit 4458046617
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/intel/igb/igb_main.c
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@ -674,6 +674,10 @@ static int __init igb_init_module(void)
dca_register_notify(&dca_notifier);
#endif
ret = pci_register_driver(&igb_driver);
#ifdef CONFIG_IGB_DCA
if (ret)
dca_unregister_notify(&dca_notifier);
#endif
return ret;
}