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| author | Kunwu Chan <chentao@kylinos.cn> | 2023-12-04 12:24:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-26 02:27:44 +0300 |
| commit | 527e8c5f3d00299822612c495d5adf1f8f43c001 (patch) | |
| tree | 04e7109beca495a1fbd000c6f54efb81ed89cd15 | |
| parent | ac3b65cbc68deeabc6100e7bac254416675a7052 (diff) | |
| download | linux-527e8c5f3d00299822612c495d5adf1f8f43c001.tar.xz | |
mfd: syscon: Fix null pointer dereference in of_syscon_register()
[ Upstream commit 41673c66b3d0c09915698fec5c13b24336f18dd1 ]
kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure.
Fixes: e15d7f2b81d2 ("mfd: syscon: Use a unique name with regmap_config")
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20231204092443.2462115-1-chentao@kylinos.cn
Signed-off-by: Lee Jones <lee@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/mfd/syscon.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c index bdb2ce7ff03b..6196724ef39b 100644 --- a/drivers/mfd/syscon.c +++ b/drivers/mfd/syscon.c @@ -102,6 +102,10 @@ static struct syscon *of_syscon_register(struct device_node *np, bool check_clk) } syscon_config.name = kasprintf(GFP_KERNEL, "%pOFn@%pa", np, &res.start); + if (!syscon_config.name) { + ret = -ENOMEM; + goto err_regmap; + } syscon_config.reg_stride = reg_io_width; syscon_config.val_bits = reg_io_width * 8; syscon_config.max_register = resource_size(&res) - reg_io_width; |