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authorChristoph Hellwig <hch@lst.de>2020-04-24 09:43:38 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2020-04-27 09:07:40 +0300
commit32927393dc1ccd60fb2bdc05b9e8e88753761469 (patch)
treec488a5564cdde7594c953219a98e22fb4865c812 /ipc/mq_sysctl.c
parentf461d2dcd511c020a26d4d791fae595c65ed09b6 (diff)
downloadlinux-32927393dc1ccd60fb2bdc05b9e8e88753761469.tar.xz
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 'ipc/mq_sysctl.c')
-rw-r--r--ipc/mq_sysctl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/ipc/mq_sysctl.c b/ipc/mq_sysctl.c
index 7c00f28923a8..72a92a08c848 100644
--- a/ipc/mq_sysctl.c
+++ b/ipc/mq_sysctl.c
@@ -19,7 +19,7 @@ static void *get_mq(struct ctl_table *table)
}
static int proc_mq_dointvec(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table mq_table;
memcpy(&mq_table, table, sizeof(mq_table));
@@ -29,7 +29,7 @@ static int proc_mq_dointvec(struct ctl_table *table, int write,
}
static int proc_mq_dointvec_minmax(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table mq_table;
memcpy(&mq_table, table, sizeof(mq_table));