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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-01-30 11:21:05 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-01-31 10:53:41 +0000
commitb0a2679d27408d97ce31e5f800b44227d3388b84 (patch)
tree5e1e6748d2208904a7223fff37e18eb956c4fa5f
parent5f2c1b30c7f60670c8b9d1cb1ea7c818b9c743a6 (diff)
ARM: initrd: disable initrd if passed address overlaps reserved region
Disable the initrd if the passed address already overlaps the reserved region. This avoids oopses on Netwinders when NeTTrom tells the kernel that an initrd is located at mem+4MB, but this overlaps the BSS, resulting in the kernels in-use BSS being freed. This should be applied to v2.6.37-stable. Cc: <stable@kernel.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mm/init.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 5164069ced4..cddd684364d 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -297,6 +297,12 @@ void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc)
memblock_reserve(__pa(_stext), _end - _stext);
#endif
#ifdef CONFIG_BLK_DEV_INITRD
+ if (phys_initrd_size &&
+ memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) {
+ pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region - disabling initrd\n",
+ phys_initrd_start, phys_initrd_size);
+ phys_initrd_start = phys_initrd_size = 0;
+ }
if (phys_initrd_size) {
memblock_reserve(phys_initrd_start, phys_initrd_size);