diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-04-24 08:43:38 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-04-27 08:07:40 +0200 |
| commit | 32927393dc1ccd60fb2bdc05b9e8e88753761469 (patch) | |
| tree | c488a5564cdde7594c953219a98e22fb4865c812 /net/decnet/dn_dev.c | |
| parent | sysctl: avoid forward declarations (diff) | |
| download | linux-32927393dc1ccd60fb2bdc05b9e8e88753761469.tar.xz linux-32927393dc1ccd60fb2bdc05b9e8e88753761469.zip | |
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 <hch@lst.de>
Acked-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'net/decnet/dn_dev.c')
| -rw-r--r-- | net/decnet/dn_dev.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c index cca7ae712995..65abcf1b3210 100644 --- a/net/decnet/dn_dev.c +++ b/net/decnet/dn_dev.c @@ -160,8 +160,8 @@ static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MU static int min_priority[1]; static int max_priority[] = { 127 }; /* From DECnet spec */ -static int dn_forwarding_proc(struct ctl_table *, int, - void __user *, size_t *, loff_t *); +static int dn_forwarding_proc(struct ctl_table *, int, void *, size_t *, + loff_t *); static struct dn_dev_sysctl_table { struct ctl_table_header *sysctl_header; struct ctl_table dn_dev_vars[5]; @@ -245,8 +245,7 @@ static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) } static int dn_forwarding_proc(struct ctl_table *table, int write, - void __user *buffer, - size_t *lenp, loff_t *ppos) + void *buffer, size_t *lenp, loff_t *ppos) { #ifdef CONFIG_DECNET_ROUTER struct net_device *dev = table->extra1; |