From 2b1c6bd77d4e6a727ffac8630cd154b2144b751a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 28 Nov 2008 10:09:09 +0100 Subject: generic compat_sys_ustat Due to a different size of ino_t ustat needs a compat handler, but currently only x86 and mips provide one. Add a generic compat_sys_ustat and switch all architectures over to it. Instead of doing various user copy hacks compat_sys_ustat just reimplements sys_ustat as it's trivial. This was suggested by Arnd Bergmann. Found by Eric Sandeen when running xfstests/017 on ppc64, which causes stack smashing warnings on RHEL/Fedora due to the too large amount of data writen by the syscall. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- arch/mips/kernel/linux32.c | 34 ---------------------------------- arch/mips/kernel/scall64-n32.S | 2 +- arch/mips/kernel/scall64-o32.S | 2 +- 3 files changed, 2 insertions(+), 36 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index 1a86f84fa94..784859cedef 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -356,40 +356,6 @@ SYSCALL_DEFINE1(32_personality, unsigned long, personality) return ret; } -/* ustat compatibility */ -struct ustat32 { - compat_daddr_t f_tfree; - compat_ino_t f_tinode; - char f_fname[6]; - char f_fpack[6]; -}; - -extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf); - -SYSCALL_DEFINE2(32_ustat, dev_t, dev, struct ustat32 __user *, ubuf32) -{ - int err; - struct ustat tmp; - struct ustat32 tmp32; - mm_segment_t old_fs = get_fs(); - - set_fs(KERNEL_DS); - err = sys_ustat(dev, (struct ustat __user *)&tmp); - set_fs(old_fs); - - if (err) - goto out; - - memset(&tmp32, 0, sizeof(struct ustat32)); - tmp32.f_tfree = tmp.f_tfree; - tmp32.f_tinode = tmp.f_tinode; - - err = copy_to_user(ubuf32, &tmp32, sizeof(struct ustat32)) ? -EFAULT : 0; - -out: - return err; -} - SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd, compat_off_t __user *, offset, s32, count) { diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S index 7438e92f8a0..f61d6b0e573 100644 --- a/arch/mips/kernel/scall64-n32.S +++ b/arch/mips/kernel/scall64-n32.S @@ -253,7 +253,7 @@ EXPORT(sysn32_call_table) PTR compat_sys_utime /* 6130 */ PTR sys_mknod PTR sys_32_personality - PTR sys_32_ustat + PTR compat_sys_ustat PTR compat_sys_statfs PTR compat_sys_fstatfs /* 6135 */ PTR sys_sysfs diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S index b0fef4ff982..60997f1f69d 100644 --- a/arch/mips/kernel/scall64-o32.S +++ b/arch/mips/kernel/scall64-o32.S @@ -265,7 +265,7 @@ sys_call_table: PTR sys_olduname PTR sys_umask /* 4060 */ PTR sys_chroot - PTR sys_32_ustat + PTR compat_sys_ustat PTR sys_dup2 PTR sys_getppid PTR sys_getpgrp /* 4065 */ -- cgit v1.2.3-70-g09d2