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fs/ntfs: Add sizes sanity checks.

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Found by: Coverity scan.
This commit is contained in:
Vladimir Serbinenko 2015-01-25 13:28:50 +01:00
parent bc0ecd7104
commit 157f9a9cca
1 changed files with 4 additions and 0 deletions
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4
grub-core/fs/ntfs.c
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@ -920,12 +920,16 @@ grub_ntfs_mount (grub_disk_t disk)
if (bpb.clusters_per_mft > 0)
data->mft_size = ((grub_disk_addr_t) bpb.clusters_per_mft) << data->log_spc;
else if (-bpb.clusters_per_mft < GRUB_NTFS_BLK_SHR || -bpb.clusters_per_mft >= 31)
goto fail;
else
data->mft_size = 1ULL << (-bpb.clusters_per_mft - GRUB_NTFS_BLK_SHR);
if (bpb.clusters_per_index > 0)
data->idx_size = (((grub_disk_addr_t) bpb.clusters_per_index)
<< data->log_spc);
else if (-bpb.clusters_per_index < GRUB_NTFS_BLK_SHR || -bpb.clusters_per_index >= 31)
goto fail;
else
data->idx_size = 1ULL << (-bpb.clusters_per_index - GRUB_NTFS_BLK_SHR);