Commit ca65fe21 authored by Helge Deller's avatar Helge Deller Committed by Greg Kroah-Hartman

parisc: Fix vmap memory leak in ioremap()/iounmap()

commit 513f7f74 upstream.

Sven noticed that calling ioremap() and iounmap() multiple times leads
to a vmap memory leak:
	vmap allocation for size 4198400 failed:
	use vmalloc=<size> to increase size

It seems we missed calling vunmap() in iounmap().
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
Noticed-by: default avatarSven Schnelle <svens@stackframe.org>
Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 19e2ed7b
...@@ -3,7 +3,7 @@ ...@@ -3,7 +3,7 @@
* arch/parisc/mm/ioremap.c * arch/parisc/mm/ioremap.c
* *
* (C) Copyright 1995 1996 Linus Torvalds * (C) Copyright 1995 1996 Linus Torvalds
* (C) Copyright 2001-2006 Helge Deller <deller@gmx.de> * (C) Copyright 2001-2019 Helge Deller <deller@gmx.de>
* (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org> * (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
*/ */
...@@ -84,7 +84,7 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l ...@@ -84,7 +84,7 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
addr = (void __iomem *) area->addr; addr = (void __iomem *) area->addr;
if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size, if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
phys_addr, pgprot)) { phys_addr, pgprot)) {
vfree(addr); vunmap(addr);
return NULL; return NULL;
} }
...@@ -92,9 +92,11 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l ...@@ -92,9 +92,11 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
} }
EXPORT_SYMBOL(__ioremap); EXPORT_SYMBOL(__ioremap);
void iounmap(const volatile void __iomem *addr) void iounmap(const volatile void __iomem *io_addr)
{ {
if (addr > high_memory) unsigned long addr = (unsigned long)io_addr & PAGE_MASK;
return vfree((void *) (PAGE_MASK & (unsigned long __force) addr));
if (is_vmalloc_addr((void *)addr))
vunmap((void *)addr);
} }
EXPORT_SYMBOL(iounmap); EXPORT_SYMBOL(iounmap);
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