diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-11-08 15:34:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-31 15:32:24 +0300 |
| commit | f5ce76aeddf01ca8f2a80fc37119388d59db7c10 (patch) | |
| tree | 863f43842f7d29fdbe0363c4afc49d1985732f68 | |
| parent | 4e1dc24bcfc8257f24c0663badec7e4f3ae80558 (diff) | |
| download | linux-f5ce76aeddf01ca8f2a80fc37119388d59db7c10.tar.xz | |
mmc: meson-gx: fix return value check of mmc_add_host()
[ Upstream commit 90935f16f2650ab7416fa2ffbe5c28cb39cf3f1e ]
mmc_add_host() may return error, if we ignore its return value,
it will lead two issues:
1. The memory that allocated in mmc_alloc_host() is leaked.
2. In the remove() path, mmc_remove_host() will be called to
delete device, but it's not added yet, it will lead a kernel
crash because of null-ptr-deref in device_del().
Fix this by checking the return value and goto error path which
will call mmc_free_host().
Fixes: 51c5d8447bd7 ("MMC: meson: initial support for GX platforms")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20221108123417.479045-1-yangyingliang@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/mmc/host/meson-gx-mmc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index df05e60bed9a..6e5ea0213b47 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -1335,7 +1335,9 @@ static int meson_mmc_probe(struct platform_device *pdev) } mmc->ops = &meson_mmc_ops; - mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto err_free_irq; return 0; |