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HSI: core: Fix return freed object in hsi_new_client

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[ Upstream commit a1ee1c08fcd5af03187dcd41dcab12fd5b379555 ]

cl is freed on error of calling device_register, but this
object is return later, which will cause uaf issue. Fix it
by return NULL on error.

Signed-off-by: Chengfeng Ye <cyeaa@connect.ust.hk>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chengfeng Ye 2021-11-05 06:45:07 -07:00 committed by Greg Kroah-Hartman
parent f4295b7dca
commit 240cf5d3cb
1 changed files with 1 additions and 0 deletions
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drivers/hsi/hsi_core.c
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@ -102,6 +102,7 @@ struct hsi_client *hsi_new_client(struct hsi_port *port,
if (device_register(&cl->device) < 0) {
pr_err("hsi: failed to register client: %s\n", info->name);
put_device(&cl->device);
goto err;
}
return cl;