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ext2: accept block count until the disk size plus one

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my understanding is that it's possible that the last block (for instance of size 4KB)
is too large for the last few partition sectors, if the partition size isn't a multiple
of the block size.

Change-Id: I88c709d6e449aa52358fd9343c9f68f7ac1c01fe
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5399
Reviewed-by: Adrien Destugues <[email protected]>
Tested-by: Commit checker robot <[email protected]>
This commit is contained in:
Jérôme Duval
2022-06-25 20:16:06 +00:00
parent 442298d494
commit 732f5f0f87
1 changed files with 3 additions and 1 deletions
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src/add-ons/kernel/file_systems/ext2/Volume.cpp
+3 -1
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@@ -233,8 +233,10 @@ Volume::Mount(const char* deviceName, uint32 flags)
status = opener.GetSize(&diskSize);
if (status != B_OK)
return status;
if (diskSize < ((off_t)NumBlocks() << BlockShift()))
if ((diskSize + fBlockSize) <= ((off_t)NumBlocks() << BlockShift())) {
FATAL("diskSize is too small for the number of blocks!\n");
return B_BAD_VALUE;
}
fBlockCache = opener.InitCache(NumBlocks(), fBlockSize);
if (fBlockCache == NULL)