File grub2-fix-enumeration-of-extended-partition.patch of Package grub2
From: Andrey Borzenkov <arvidjaar@gmail.com> Subject: [PATCH] fix off by one error in enumerating MSDOS partitions References: bnc#779534 As reported in https://bugzilla.novell.com/show_bug.cgi?id=779534, grub2 assigns incorrect partition number to extended partitions. This is due to slightly non-standard EBR which contains single extended partition record, but no normal partition. Due to incorrect p.number comparison, grub2 includes it in partition numbering. With standard EBR first entry is "true" partition that correctly gets assigned next available number. At the point of comparison p.number is one less than partition number; so make correct comparison. Actual partition chain is visible in this attachement: http://bugzilla.novell.com/attachment.cgi?id=519076 Signed-off-by: Andrey Borzenkov <arvidjaar@gmail.com> --- grub-core/partmap/msdos.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: grub-2.00/grub-core/partmap/msdos.c =================================================================== --- grub-2.00.orig/grub-core/partmap/msdos.c +++ grub-2.00/grub-core/partmap/msdos.c @@ -196,7 +196,7 @@ grub_partition_msdos_iterate (grub_disk_ return grub_errno; } } - else if (p.number < 4) + else if (p.number < 3) /* If this partition is a logical one, shouldn't increase the partition number. */ p.number++;
