From 32927393dc1ccd60fb2bdc05b9e8e88753761469 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 24 Apr 2020 08:43:38 +0200 Subject: sysctl: pass kernel pointers to ->proc_handler Instead of having all the sysctl handlers deal with user pointers, which is rather hairy in terms of the BPF interaction, copy the input to and from userspace in common code. This also means that the strings are always NUL-terminated by the common code, making the API a little bit safer. As most handler just pass through the data to one of the common handlers a lot of the changes are mechnical. Signed-off-by: Christoph Hellwig Acked-by: Andrey Ignatov Signed-off-by: Al Viro --- fs/fscache/main.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'fs/fscache') diff --git a/fs/fscache/main.c b/fs/fscache/main.c index 59c2494efda3..c1e6cc9091aa 100644 --- a/fs/fscache/main.c +++ b/fs/fscache/main.c @@ -51,8 +51,7 @@ static unsigned fscache_op_max_active = 2; static struct ctl_table_header *fscache_sysctl_header; static int fscache_max_active_sysctl(struct ctl_table *table, int write, - void __user *buffer, - size_t *lenp, loff_t *ppos) + void *buffer, size_t *lenp, loff_t *ppos) { struct workqueue_struct **wqp = table->extra1; unsigned int *datap = table->data; -- cgit v1.2.3