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ata: libata: Fix memory leak for error path in ata_host_alloc()

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commit 284b75a3d83c7631586d98f6dede1d90f128f0db upstream.

In ata_host_alloc(), if devres_alloc() fails to allocate the device host
resource data pointer, the already allocated ata_host structure is not
freed before returning from the function. This results in a potential
memory leak.

Call kfree(host) before jumping to the error handling path to ensure
that the ata_host structure is properly freed if devres_alloc() fails.

Fixes: 2623c7a5f2 ("libata: add refcounting to ata_host")
Cc: stable@vger.kernel.org
Signed-off-by: Zheng Qixing <zhengqixing@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zheng Qixing 2024-08-22 11:30:50 +08:00 • committed by Greg Kroah-Hartman
parent f75881f54c
commit c0fbc9593b
1 changed files with 3 additions and 1 deletions
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4
drivers/ata/libata-core.c
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@ -5593,8 +5593,10 @@ struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
}
dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
if (!dr)
if (!dr) {
kfree(host);
goto err_out;
}
devres_add(dev, dr);
dev_set_drvdata(dev, host);