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Subject[PATCH 1/1] sys_sysfs: Add CONFIG_SYSFS_SYSCALL
sys_sysfs is an obsolete system call no longer supported by libc ...
-This patch adds a default CONFIG_SYSFS_SYSCALL=y
-Option can be turned off in expert mode.
-cond_syscall added to kernel/sys_ni.c

Signed-off-by: Fabian Frederick <fabf@skynet.be>
---
fs/filesystems.c | 2 ++
init/Kconfig | 10 ++++++++++
kernel/sys_ni.c | 1 +
3 files changed, 13 insertions(+)

diff --git a/fs/filesystems.c b/fs/filesystems.c
index 92567d9..5797d45 100644
--- a/fs/filesystems.c
+++ b/fs/filesystems.c
@@ -121,6 +121,7 @@ int unregister_filesystem(struct file_system_type * fs)

EXPORT_SYMBOL(unregister_filesystem);

+#ifdef CONFIG_SYSFS_SYSCALL
static int fs_index(const char __user * __name)
{
struct file_system_type * tmp;
@@ -199,6 +200,7 @@ SYSCALL_DEFINE3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2)
}
return retval;
}
+#endif

int __init get_filesystem_list(char *buf)
{
diff --git a/init/Kconfig b/init/Kconfig
index 009a797..013d13c 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1290,6 +1290,16 @@ config UID16
help
This enables the legacy 16-bit UID syscall wrappers.

+config SYSFS_SYSCALL
+ bool "Sysfs syscall support" if EXPERT
+ default y
+ ---help---
+ sys_sysfs is an obsolete system call no longer supported in
+ libc.Note that disabling this option while being more secure breaks
+ compatibility with other systems.
+
+ If unsure say Y here.
+
config SYSCTL_SYSCALL
bool "Sysctl syscall support" if EXPERT
depends on PROC_SYSCTL
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 7078052..74395a9 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -146,6 +146,7 @@ cond_syscall(sys_io_destroy);
cond_syscall(sys_io_submit);
cond_syscall(sys_io_cancel);
cond_syscall(sys_io_getevents);
+cond_syscall(sys_sysfs);
cond_syscall(sys_syslog);
cond_syscall(sys_process_vm_readv);
cond_syscall(sys_process_vm_writev);
--
1.8.1.4


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