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Fix potential out of bounds access in msc_disk.c #2939

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@PwnVerse PwnVerse commented Jan 9, 2025

Description

This PR addresses a potential buffer overflow issue in the tud_msc_read10_cb function. Previously, the function did not validate whether the combination of offset and bufsize exceeded the disk block size, which could result in out-of-bounds memory access during the memcpy operation.

Changes

Added a validation check to ensure offset + bufsize does not exceed the defined DISK_BLOCK_SIZE. If this condition is violated, the function now returns -1.

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