[Buildroot] [PATCH 2/2] grub: fix ext2 segfaults

[Darius Augulis]

On 08/21/2011 07:52 PM, Darius Augulis wrote:
> Fix grub issue when loading stage2 from ext2.
> The symptom is periodically rebooting system.
> This fix is borrowed from *somewhere* but it
> does the job.

Hi all,

please review this patch and merge if it's ok.
Thanks.

Darius A.

>
> Signed-off-by: Darius Augulis<augulis.darius at gmail.com>
> ---
>   boot/grub/grub.600-ext2-fix.patch |   32 ++++++++++++++++++++++++++++++++
>   1 files changed, 32 insertions(+), 0 deletions(-)
>   create mode 100644 boot/grub/grub.600-ext2-fix.patch
>
> diff --git a/boot/grub/grub.600-ext2-fix.patch b/boot/grub/grub.600-ext2-fix.patch
> new file mode 100644
> index 0000000..8bbd199
> --- /dev/null
> +++ b/boot/grub/grub.600-ext2-fix.patch
> @@ -0,0 +1,32 @@
> +diff -uprN grub-0.97-orig//debian/patches/00list grub-0.97/debian/patches/00list
> +--- grub-0.97-orig//debian/patches/00list	2011-08-21 17:08:01.651441450 +0300
> ++++ grub-0.97/debian/patches/00list	2011-08-21 17:13:11.712978964 +0300
> +@@ -24,6 +24,7 @@ crossreference_manpages.diff
> + ext3_256byte_inode.diff
> + use_grub-probe_in_grub-install.diff
> + 128gib_disk_limit.diff
> ++ext2_fix.diff
> +
> + # We aren't building amd64 binaries, see #244498
> + #fix_amd64_compile.diff
> +diff -uprN grub-0.97-orig//debian/patches/ext2_fix.diff grub-0.97/debian/patches/ext2_fix.diff
> +--- grub-0.97-orig//debian/patches/ext2_fix.diff	1970-01-01 03:00:00.000000000 +0300
> ++++ grub-0.97/debian/patches/ext2_fix.diff	2011-08-21 17:12:10.088673380 +0300
> +@@ -0,0 +1,17 @@
> ++diff -uprN grub-0.97-orig//stage2/fsys_ext2fs.c grub-0.97/stage2/fsys_ext2fs.c
> ++--- grub-0.97-orig//stage2/fsys_ext2fs.c	2011-08-21 17:08:01.647441447 +0300
> +++++ grub-0.97/stage2/fsys_ext2fs.c	2011-08-21 17:11:05.312352171 +0300
> ++@@ -263,7 +263,12 @@ struct ext2_dir_entry
> ++ #define EXT2_ADDR_PER_BLOCK(s)          (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
> ++ #define EXT2_ADDR_PER_BLOCK_BITS(s)		(log2(EXT2_ADDR_PER_BLOCK(s)))
> ++
> ++-#define EXT2_INODE_SIZE(s)		(SUPERBLOCK->s_inode_size)
> +++#define EXT2_GOOD_OLD_REV   0   /* The good old (original) format */
> +++#define EXT2_DYNAMIC_REV    1   /* V2 format w/ dynamic inode sizes */
> +++#define EXT2_GOOD_OLD_INODE_SIZE 128
> +++#define EXT2_INODE_SIZE(s)  (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
> +++		EXT2_GOOD_OLD_INODE_SIZE : \
> +++		(s)->s_inode_size)
> ++ #define EXT2_INODES_PER_BLOCK(s)	(EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s))
> ++
> ++ /* linux/ext2_fs.h */