of_flat_dt_debugfs_export_fdt uses initial_boot_params without checking if it is valid, and ends up dereferencing a NULL pointer if there is no DT blob.
This patch adds a check that initial_boot_params is NULL, returning -ENOENT if it is. Signed-off-by: Phil Elwell <[email protected]> --- drivers/of/fdt.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index d1ffca8..f018e5b 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -1085,8 +1085,12 @@ static struct debugfs_blob_wrapper flat_dt_blob; static int __init of_flat_dt_debugfs_export_fdt(void) { - struct dentry *d = debugfs_create_dir("device-tree", NULL); + struct dentry *d; + if (!initial_boot_params) + return -ENOENT; + + d = debugfs_create_dir("device-tree", NULL); if (!d) return -ENOENT; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
