android-sparse: Split extents of 4GB or more#325
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michaelolbrich merged 1 commit intopengutronix:masterfrom Mar 13, 2026
Merged
android-sparse: Split extents of 4GB or more#325michaelolbrich merged 1 commit intopengutronix:masterfrom
michaelolbrich merged 1 commit intopengutronix:masterfrom
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The Android sparse image format uses chunk headers that include the (slightly redundant) overall size of each chunk. The size is stored in a 32-bit integer, limiting the maximum chunk size to 2**32 - 1. Fix a long-standing To Do by implementing the splitting of extents which are 4GB or larger. Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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FYI, this PR is the result of a real-world failure (https://forums.raspberrypi.com/viewtopic.php?p=2366517#p2366517), albeit one that I have yet to recreate using a real image. |
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The Android sparse image format uses chunk headers that include the (slightly redundant) overall size of each chunk. The size is stored in a 32-bit integer, limiting the maximum chunk size to 2**32 - 1.
Fix a long-standing To Do by implementing the splitting of extents which are 4GB or larger.