https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249533
Bug ID: 249533
Summary: fsck_msdosfs: Integer overflow in checksize() for
files close to 4GiB in size on 32-bit platform
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Reference:
https://android-review.googlesource.com/c/platform/external/fsck_msdos/+/1428461
In checksize(), the physicalSize is represented in size_t, which is 32-bit on
32-bit platforms. When the file size is within (4GiB-cluster size..4GiB)
range, the count of cluster * cluster size would be exactly 4 GiB, which will
wrap to 0 and cause the file to be errornously truncated.
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