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Reject NILFS2 superblocks with over 1GiB blocks.

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* grub-core/fs/nilfs2.c (grub_nilfs2_valid_sb): Check that
	block size is <= 1GiB.
This commit is contained in:
Vladimir Serbinenko 2015-01-20 14:27:27 +01:00
parent f27ccb584c
commit 9201cd79a3
2 changed files with 11 additions and 0 deletions
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4
grub-core/fs/nilfs2.c
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@ -724,6 +724,10 @@ grub_nilfs2_valid_sb (struct grub_nilfs2_super_block *sbp)
if (grub_le_to_cpu32 (sbp->s_rev_level) != NILFS_SUPORT_REV)
return 0;
/* 20 already means 1GiB blocks. We don't want to deal with blocks overflowing int32. */
if (grub_le_to_cpu32 (sbp->s_log_block_size) > 20)
return 0;
return 1;
}