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misc: tifm: fix possible memory leak in tifm_7xx1_switch_media()

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[ Upstream commit fd2c930cf6a5b9176382c15f9acb1996e76e25ad ]

If device_register() returns error in tifm_7xx1_switch_media(),
name of kobject which is allocated in dev_set_name() called in device_add()
is leaked.

Never directly free @dev after calling device_register(), even
if it returned an error! Always use put_device() to give up the
reference initialized.

Fixes: 2428a8fe2261 ("tifm: move common device management tasks from tifm_7xx1 to tifm_core")
Signed-off-by: ruanjinjie <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20221117064725.3478402-1-ruanjinjie@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
ruanjinjie 2022-11-17 14:47:25 +08:00 committed by Greg Kroah-Hartman
parent ed5cbafaf7
commit d861b7d41b
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/tifm_7xx1.c
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@ -194,7 +194,7 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
spin_unlock_irqrestore(&fm->lock, flags);
}
if (sock)
tifm_free_device(&sock->dev);
put_device(&sock->dev);
}
spin_lock_irqsave(&fm->lock, flags);
}