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| author | Zhang Shurong <zhang_shurong@foxmail.com> | 2023-07-15 22:13:38 +0800 |
|---|---|---|
| committer | Neil Armstrong <neil.armstrong@linaro.org> | 2023-08-04 15:19:01 +0200 |
| commit | f2ed165619c16577c02b703a114a1f6b52026df4 (patch) | |
| tree | 41c43d24a5dfb30c6cbfc24661e435406419c8c6 /drivers/firmware | |
| parent | 584ed6d4afca4824f3bf18e588cc0cb555278bff (diff) | |
| download | linux-stable-f2ed165619c16577c02b703a114a1f6b52026df4.tar.gz linux-stable-f2ed165619c16577c02b703a114a1f6b52026df4.tar.bz2 linux-stable-f2ed165619c16577c02b703a114a1f6b52026df4.zip | |
firmware: meson_sm: fix to avoid potential NULL pointer dereference
of_match_device() may fail and returns a NULL pointer.
Fix this by checking the return value of of_match_device.
Fixes: 8cde3c2153e8 ("firmware: meson_sm: Rework driver as a proper platform driver")
Signed-off-by: Zhang Shurong <zhang_shurong@foxmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/tencent_AA08AAA6C4F34D53ADCE962E188A879B8206@qq.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/meson/meson_sm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/firmware/meson/meson_sm.c b/drivers/firmware/meson/meson_sm.c index 798bcdb05d84..9a2656d73600 100644 --- a/drivers/firmware/meson/meson_sm.c +++ b/drivers/firmware/meson/meson_sm.c @@ -292,6 +292,8 @@ static int __init meson_sm_probe(struct platform_device *pdev) return -ENOMEM; chip = of_match_device(meson_sm_ids, dev)->data; + if (!chip) + return -EINVAL; if (chip->cmd_shmem_in_base) { fw->sm_shmem_in_base = meson_sm_map_shmem(chip->cmd_shmem_in_base, |