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formats/fs_fat.cpp: Guard against divide by zero errors when the bytes per sector field in the parameter block is not properly set (as on some early PC-DOS disks)

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AJR 2024-11-09 10:08:15 -05:00
parent 93eb3514b1
commit 94ee92901b
1 changed files with 2 additions and 0 deletions
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src/lib/formats/fs_fat.cpp
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@ -564,6 +564,8 @@ impl::impl(fsblk_t &blockdev, fsblk_t::block_t &&boot_sector_block, std::vector<
, m_last_cluster_indicator(((u64)1 << bits_per_fat_entry) - 1)
, m_last_valid_cluster(m_last_cluster_indicator - 0x10)
{
if (m_bytes_per_sector == 0)
m_bytes_per_sector = 512;
}