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Commit 3de2403e authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: Fix fork/clone/vfork system call restart.
  sparc: Fix mmap VA span checking.
parents e0164af6 1e38c126

arch/sparc/kernel/process.c

+16 −4
Original line number Diff line number Diff line
@@ -419,14 +419,26 @@ asmlinkage int sparc_do_fork(unsigned long clone_flags, 
                             unsigned long stack_size)

{

	unsigned long parent_tid_ptr, child_tid_ptr;

	unsigned long orig_i1 = regs->u_regs[UREG_I1];

	long ret;



	parent_tid_ptr = regs->u_regs[UREG_I2];

	child_tid_ptr = regs->u_regs[UREG_I4];



	return do_fork(clone_flags, stack_start,

	ret = do_fork(clone_flags, stack_start,

		      regs, stack_size,

		      (int __user *) parent_tid_ptr,

		      (int __user *) child_tid_ptr);



	/* If we get an error and potentially restart the system

	 * call, we're screwed because copy_thread() clobbered

	 * the parent's %o1.  So detect that case and restore it

	 * here.

	 */

	if ((unsigned long)ret >= -ERESTART_RESTARTBLOCK)

		regs->u_regs[UREG_I1] = orig_i1;



	return ret;

}



/* Copy a Sparc thread.  The fork() return value conventions

arch/sparc/kernel/sys_sparc.c

+1 −2
Original line number Diff line number Diff line
@@ -223,8 +223,7 @@ int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags) 
{

	if (ARCH_SUN4C_SUN4 &&

	    (len > 0x20000000 ||

	     ((flags & MAP_FIXED) &&

	      addr < 0xe0000000 && addr + len > 0x20000000)))

	     (addr < 0xe0000000 && addr + len > 0x20000000)))

		return -EINVAL;



	/* See asm-sparc/uaccess.h */

arch/sparc64/kernel/process.c

+15 −3
Original line number Diff line number Diff line
@@ -503,6 +503,8 @@ asmlinkage long sparc_do_fork(unsigned long clone_flags, 
			      unsigned long stack_size)

{

	int __user *parent_tid_ptr, *child_tid_ptr;

	unsigned long orig_i1 = regs->u_regs[UREG_I1];

	long ret;



#ifdef CONFIG_COMPAT

	if (test_thread_flag(TIF_32BIT)) {
@@ -515,9 +517,19 @@ asmlinkage long sparc_do_fork(unsigned long clone_flags, 
		child_tid_ptr = (int __user *) regs->u_regs[UREG_I4];

	}



	return do_fork(clone_flags, stack_start,

	ret = do_fork(clone_flags, stack_start,

		      regs, stack_size,

		      parent_tid_ptr, child_tid_ptr);



	/* If we get an error and potentially restart the system

	 * call, we're screwed because copy_thread() clobbered

	 * the parent's %o1.  So detect that case and restore it

	 * here.

	 */

	if ((unsigned long)ret >= -ERESTART_RESTARTBLOCK)

		regs->u_regs[UREG_I1] = orig_i1;



	return ret;

}



/* Copy a Sparc thread.  The fork() return value conventions

arch/sparc64/kernel/sys_sparc.c

+2 −2
Original line number Diff line number Diff line
@@ -549,13 +549,13 @@ int sparc64_mmap_check(unsigned long addr, unsigned long len, 
		if (len >= STACK_TOP32)

			return -EINVAL;



		if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len)

		if (addr > STACK_TOP32 - len)

			return -EINVAL;

	} else {

		if (len >= VA_EXCLUDE_START)

			return -EINVAL;



		if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len))

		if (invalid_64bit_range(addr, len))

			return -EINVAL;

	}