The patch titled
sysctl: fix sys_sysctl interface of ipc sysctls
has been removed from the -mm tree. Its filename was
sysctl-fix-sys_sysctl-interface-of-ipc-sysctls.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: sysctl: fix sys_sysctl interface of ipc sysctls
From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Currently there is a regression and the ipc sysctls don't show up in the
binary sysctl namespace.
This patch adds sysctl_ipc_data to read data/write from the appropriate
namespace and deliver it in the expected manner.
[akpm@xxxxxxxx: warning fix]
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/sysctl.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)
diff -puN kernel/sysctl.c~sysctl-fix-sys_sysctl-interface-of-ipc-sysctls kernel/sysctl.c
--- a/kernel/sysctl.c~sysctl-fix-sys_sysctl-interface-of-ipc-sysctls
+++ a/kernel/sysctl.c
@@ -143,6 +143,12 @@ static int sysctl_uts_string(ctl_table *
void __user *oldval, size_t __user *oldlenp,
void __user *newval, size_t newlen, void **context);
+#ifdef CONFIG_SYSVIPC
+static int sysctl_ipc_data(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context);
+#endif
+
#ifdef CONFIG_PROC_SYSCTL
static int proc_do_cad_pid(ctl_table *table, int write, struct file *filp,
void __user *buffer, size_t *lenp, loff_t *ppos);
@@ -476,6 +482,7 @@ static ctl_table kern_table[] = {
.maxlen = sizeof (init_ipc_ns.shm_ctlmax),
.mode = 0644,
.proc_handler = &proc_ipc_doulongvec_minmax,
+ .strategy = sysctl_ipc_data,
},
{
.ctl_name = KERN_SHMALL,
@@ -484,6 +491,7 @@ static ctl_table kern_table[] = {
.maxlen = sizeof (init_ipc_ns.shm_ctlall),
.mode = 0644,
.proc_handler = &proc_ipc_doulongvec_minmax,
+ .strategy = sysctl_ipc_data,
},
{
.ctl_name = KERN_SHMMNI,
@@ -492,6 +500,7 @@ static ctl_table kern_table[] = {
.maxlen = sizeof (init_ipc_ns.shm_ctlmni),
.mode = 0644,
.proc_handler = &proc_ipc_dointvec,
+ .strategy = sysctl_ipc_data,
},
{
.ctl_name = KERN_MSGMAX,
@@ -500,6 +509,7 @@ static ctl_table kern_table[] = {
.maxlen = sizeof (init_ipc_ns.msg_ctlmax),
.mode = 0644,
.proc_handler = &proc_ipc_dointvec,
+ .strategy = sysctl_ipc_data,
},
{
.ctl_name = KERN_MSGMNI,
@@ -508,6 +518,7 @@ static ctl_table kern_table[] = {
.maxlen = sizeof (init_ipc_ns.msg_ctlmni),
.mode = 0644,
.proc_handler = &proc_ipc_dointvec,
+ .strategy = sysctl_ipc_data,
},
{
.ctl_name = KERN_MSGMNB,
@@ -516,6 +527,7 @@ static ctl_table kern_table[] = {
.maxlen = sizeof (init_ipc_ns.msg_ctlmnb),
.mode = 0644,
.proc_handler = &proc_ipc_dointvec,
+ .strategy = sysctl_ipc_data,
},
{
.ctl_name = KERN_SEM,
@@ -524,6 +536,7 @@ static ctl_table kern_table[] = {
.maxlen = 4*sizeof (int),
.mode = 0644,
.proc_handler = &proc_ipc_dointvec,
+ .strategy = sysctl_ipc_data,
},
#endif
#ifdef CONFIG_MAGIC_SYSRQ
@@ -2611,6 +2624,47 @@ static int sysctl_uts_string(ctl_table *
return r;
}
+#ifdef CONFIG_SYSVIPC
+/* The generic sysctl ipc data routine. */
+static int sysctl_ipc_data(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ size_t len;
+ void *data;
+
+ /* Get out of I don't have a variable */
+ if (!table->data || !table->maxlen)
+ return -ENOTDIR;
+
+ data = get_ipc(table, 1);
+ if (!data)
+ return -ENOTDIR;
+
+ if (oldval && oldlenp) {
+ if (get_user(len, oldlenp))
+ return -EFAULT;
+ if (len) {
+ if (len > table->maxlen)
+ len = table->maxlen;
+ if (copy_to_user(oldval, data, len))
+ return -EFAULT;
+ if (put_user(len, oldlenp))
+ return -EFAULT;
+ }
+ }
+
+ if (newval && newlen) {
+ if (newlen > table->maxlen)
+ newlen = table->maxlen;
+
+ if (copy_from_user(data, newval, newlen))
+ return -EFAULT;
+ }
+ return 1;
+}
+#endif
+
#else /* CONFIG_SYSCTL_SYSCALL */
@@ -2681,6 +2735,12 @@ static int sysctl_uts_string(ctl_table *
{
return -ENOSYS;
}
+static int sysctl_ipc_data(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ return -ENOSYS;
+}
#endif /* CONFIG_SYSCTL_SYSCALL */
/*
_
Patches currently in -mm which might be from ebiederm@xxxxxxxxxxxx are
origin.patch
sysctl-fix-sys_sysctl-interface-of-ipc-sysctls.patch
genapic-optimize-fix-apic-mode-setup-2.patch
genapic-always-use-physical-delivery-mode-on-8-cpus.patch
genapic-remove-es7000-workaround.patch
genapic-remove-clustered-apic-mode.patch
genapic-default-to-physical-mode-on-hotplug-cpu-kernels.patch
sched2-sched-domain-sysctl-use-ctl_unnumbered.patch
mm-implement-swap-prefetching-use-ctl_unnumbered.patch
readahead-sysctl-parameters-use-ctl_unnumbered.patch
updated-i386-cleanup-apic-code.patch
updated-i386-rework-local-apic-calibration.patch
updated-dynticks-fix-nmi-watchdog.patch
clockevents-core-check-for-clock-event-device-handler-being-non-null-before-calling-it.patch
pidhash-temporary-debug-checks.patch
vdso-print-fatal-signals-use-ctl_unnumbered.patch
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