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i2c: core: fix reference leak in i2c_register_adapter()

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JIRA: https://redhat.atlassian.net/browse/RHEL-222908
CVE: CVE-2026-64279

commit 3f8c4f5e9a57868fa107016c81165686d23325f2
Author: Joe Hattori <joe@pf.is.s.u-tokyo.ac.jp>
Date:   Wed Dec 11 12:08:03 2024 +0900

    i2c: core: fix reference leak in i2c_register_adapter()

    The reference count of the device incremented in device_initialize() is
    not decremented when device_add() fails. Add a put_device() call before
    returning from the function.

    This bug was found by an experimental static analysis tool that I am
    developing.

    Fixes: 60f6859702 ("i2c: core: Setup i2c_adapter runtime-pm before calling device_add()")
    Signed-off-by: Joe Hattori <joe@pf.is.s.u-tokyo.ac.jp>
    Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Signed-off-by: Steve Best <sbest@redhat.com>
This commit is contained in:
Steve Best
2026-08-04 04:22:23 -04:00
parent 41fbb1f9af
commit 31179a7019
1 changed files with 1 additions and 0 deletions
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drivers/i2c/i2c-core-base.c
+1
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@@ -1563,6 +1563,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
res = device_add(&adap->dev);
if (res) {
pr_err("adapter '%s': can't register device (%d)\n", adap->name, res);
put_device(&adap->dev);
goto out_list;
}