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 /fs/drop_caches.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 'fs/drop_caches.c')
| -rw-r--r-- | fs/drop_caches.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/drop_caches.c b/fs/drop_caches.c index dc1a1d5d825b..f00fcc4a4f72 100644 --- a/fs/drop_caches.c +++ b/fs/drop_caches.c @@ -47,7 +47,7 @@ static void drop_pagecache_sb(struct super_block *sb, void *unused) } int drop_caches_sysctl_handler(struct ctl_table *table, int write, - void __user *buffer, size_t *length, loff_t *ppos) + void *buffer, size_t *length, loff_t *ppos) { int ret; |