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sysctl: move cad_pid into kernel/pid.c

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Move cad_pid as well as supporting function proc_do_cad_pid into
kernel/pic.c. Replaced call to __do_proc_dointvec with proc_dointvec
inside proc_do_cad_pid which requires the copy of the ctl_table to
handle the temp value.

This is part of a greater effort to move ctl tables into their
respective subsystems which will reduce the merge conflicts in
kernel/sysctl.c.

Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Joel Granados <joel.granados@kernel.org>
This commit is contained in:
Joel Granados
2025-05-05 21:47:47 +02:00
parent 942b296a6c
commit e054bcbe7e
2 changed files with 31 additions and 31 deletions
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31
kernel/pid.c
View File

@@ -713,6 +713,29 @@ static struct ctl_table_root pid_table_root = {
.set_ownership = pid_table_root_set_ownership,
};
static int proc_do_cad_pid(const struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
struct pid *new_pid;
pid_t tmp_pid;
int r;
struct ctl_table tmp_table = *table;
tmp_pid = pid_vnr(cad_pid);
tmp_table.data = &tmp_pid;
r = proc_dointvec(&tmp_table, write, buffer, lenp, ppos);
if (r || !write)
return r;
new_pid = find_get_pid(tmp_pid);
if (!new_pid)
return -ESRCH;
put_pid(xchg(&cad_pid, new_pid));
return 0;
}
static const struct ctl_table pid_table[] = {
{
.procname = "pid_max",
@@ -723,6 +746,14 @@ static const struct ctl_table pid_table[] = {
.extra1 = &pid_max_min,
.extra2 = &pid_max_max,
},
#ifdef CONFIG_PROC_SYSCTL
{
.procname = "cad_pid",
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = proc_do_cad_pid,
},
#endif
};
#endif

31
kernel/sysctl.c
View File

@@ -1224,28 +1224,6 @@ int proc_dointvec_ms_jiffies(const struct ctl_table *table, int write, void *buf
do_proc_dointvec_ms_jiffies_conv, NULL);
}
static int proc_do_cad_pid(const struct ctl_table *table, int write, void *buffer,
size_t *lenp, loff_t *ppos)
{
struct pid *new_pid;
pid_t tmp;
int r;
tmp = pid_vnr(cad_pid);
r = __do_proc_dointvec(&tmp, table, write, buffer,
lenp, ppos, NULL, NULL);
if (r || !write)
return r;
new_pid = find_get_pid(tmp);
if (!new_pid)
return -ESRCH;
put_pid(xchg(&cad_pid, new_pid));
return 0;
}
/**
* proc_do_large_bitmap - read/write from/to a large bitmap
* @table: the sysctl table
@@ -1541,15 +1519,6 @@ static const struct ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = proc_dostring,
},
#endif
#ifdef CONFIG_PROC_SYSCTL
{
.procname = "cad_pid",
.data = NULL,
.maxlen = sizeof (int),
.mode = 0600,
.proc_handler = proc_do_cad_pid,
},
#endif
{
.procname = "overflowuid",