Hi Ian,
> From: Ian Munsie <[email protected]>
>
> If the system has a PCI device with a memory-controller device node,
> kexec-lite would spew hundreds of double free warnings and eventually
> segfault. This would result in a "kexec load failed" message from
> petitboot.
>
> This was due to kexec_memory_map() searching for "memory" nodes, but
> actually matching any node that started with "memory", including these
> "memory-controller" nodes. This patch changes the search to look for
> nodes starting with "memory@", which should only match memory nodes.
Nice catch! I wonder if we should be checking for device_type
"memory". Ben?
Anton
> An example of a device tree that can trigger this bug is as follows:
>
> {
> pciex@3fffe40000000 {
> ...
> pci@0 {
> #address-cells = <0x3>;
> #size-cells = <0x2>;
> ...
> memory-controller@0 {
> reg = <0x10000 0x0 0x0 0x0 0x0>;
> ...
> };
> };
> };
> };
>
> Signed-off-by: Ian Munsie <[email protected]>
> ---
> kexec_memory_map.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kexec_memory_map.c b/kexec_memory_map.c
> index fc1b7af..7f18de7 100644
> --- a/kexec_memory_map.c
> +++ b/kexec_memory_map.c
> @@ -192,7 +192,7 @@ void kexec_memory_map(void *fdt, int
> reserve_initrd)
> name = fdt_get_name(fdt, nodeoffset, NULL);
>
> - if (!name || strncmp(name, "memory",
> strlen("memory")))
> + if (!name || strncmp(name, "memory@",
> strlen("memory@"))) continue;
>
> reg = fdt_getprop(fdt, nodeoffset, "reg", &len);
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