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 02:07:40 -0400 |
| commit | 32927393dc1ccd60fb2bdc05b9e8e88753761469 (patch) | |
| tree | c488a5564cdde7594c953219a98e22fb4865c812 /net/ipv4/devinet.c | |
| parent | f461d2dcd511c020a26d4d791fae595c65ed09b6 (diff) | |
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/ipv4/devinet.c')
| -rw-r--r-- | net/ipv4/devinet.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 30fa42f5997d..a118978d222c 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -2361,8 +2361,7 @@ static int devinet_conf_ifindex(struct net *net, struct ipv4_devconf *cnf) } static int devinet_conf_proc(struct ctl_table *ctl, int write, - void __user *buffer, - size_t *lenp, loff_t *ppos) + void *buffer, size_t *lenp, loff_t *ppos) { int old_value = *(int *)ctl->data; int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); @@ -2414,8 +2413,7 @@ static int devinet_conf_proc(struct ctl_table *ctl, int write, } static int devinet_sysctl_forward(struct ctl_table *ctl, int write, - void __user *buffer, - size_t *lenp, loff_t *ppos) + void *buffer, size_t *lenp, loff_t *ppos) { int *valp = ctl->data; int val = *valp; @@ -2458,8 +2456,7 @@ static int devinet_sysctl_forward(struct ctl_table *ctl, int write, } static int ipv4_doint_and_flush(struct ctl_table *ctl, int write, - void __user *buffer, - size_t *lenp, loff_t *ppos) + void *buffer, size_t *lenp, loff_t *ppos) { int *valp = ctl->data; int val = *valp; |