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authorFabian Frederick <fabf@skynet.be>2014-04-03 14:48:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-03 16:21:05 -0700
commit6af9f7bf3c399e0ab1eee048e13572c6d4e15fe9 (patch)
tree1d298fe98692134505d10f2d4d7fc0f9c6494ad1
parente3a0cfdc8c8904236f91a506c1e760b0d60dd918 (diff)
downloadlinux-6af9f7bf3c399e0ab1eee048e13572c6d4e15fe9.tar.bz2
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 [akpm@linux-foundation.org: tweak Kconfig help text] Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/filesystems.c2
-rw-r--r--init/Kconfig10
-rw-r--r--kernel/sys_ni.c1
3 files changed, 13 insertions, 0 deletions
diff --git a/fs/filesystems.c b/fs/filesystems.c
index 92567d95ba6a..5797d45a78cb 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 d56cb03c1b49..e45cc62904b3 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 is more secure but might break
+ compatibility with some 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 7078052284fd..74395a95b7e9 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);