diff options
| author | Helge Deller <deller@gmx.de> | 2019-10-04 20:23:37 +0300 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2019-10-14 22:44:17 +0300 |
| commit | 513f7f747e1cba81f28a436911fba0b485878ebd (patch) | |
| tree | 1d6d3351b0fb65e2f262645a9f5514bddad572f9 /arch/parisc/mm/ioremap.c | |
| parent | 0703ad217ebd441dd730af71f8d9cdbf144fbc03 (diff) | |
| download | linux-513f7f747e1cba81f28a436911fba0b485878ebd.tar.xz | |
parisc: Fix vmap memory leak in ioremap()/iounmap()
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: Helge Deller <deller@gmx.de>
Noticed-by: Sven Schnelle <svens@stackframe.org>
Cc: <stable@vger.kernel.org> # v3.16+
Diffstat (limited to 'arch/parisc/mm/ioremap.c')
| -rw-r--r-- | arch/parisc/mm/ioremap.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/parisc/mm/ioremap.c b/arch/parisc/mm/ioremap.c index 92a9b5f12f98..f29f682352f0 100644 --- a/arch/parisc/mm/ioremap.c +++ b/arch/parisc/mm/ioremap.c @@ -3,7 +3,7 @@ * arch/parisc/mm/ioremap.c * * (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> */ @@ -84,7 +84,7 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l addr = (void __iomem *) area->addr; if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size, phys_addr, pgprot)) { - vfree(addr); + vunmap(addr); return NULL; } @@ -92,9 +92,11 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l } EXPORT_SYMBOL(__ioremap); -void iounmap(const volatile void __iomem *addr) +void iounmap(const volatile void __iomem *io_addr) { - if (addr > high_memory) - return vfree((void *) (PAGE_MASK & (unsigned long __force) addr)); + unsigned long addr = (unsigned long)io_addr & PAGE_MASK; + + if (is_vmalloc_addr((void *)addr)) + vunmap((void *)addr); } EXPORT_SYMBOL(iounmap); |