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Pari Malam
2026-07-15 14:22:49 +08:00
parent 673573dc11
commit 0967cbf67b
1 changed files with 7 additions and 4 deletions
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src/formats/ubi/ubifs.rs
+7 -4
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@@ -183,18 +183,21 @@ fn scan_nodes(
} }
let crc = le32(image, off + 4); let crc = le32(image, off + 4);
let len = le32(image, off + 8) as usize; // Common header: magic(0) crc(4) sqnum(8,u64) len(16,u32) node_type(20).
let node_type = image[off + 12]; let len = le32(image, off + 16) as usize;
let node_type = image[off + 20];
if len < CH_SZ || off + len > n { if len < CH_SZ || off + len > n {
off += 8; off += 8;
continue; continue;
} }
// Validate CRC-32 over everything after the crc field. // Validate CRC-32 over everything after the crc field. UBIFS uses the
// Linux crc32() (init 0xFFFFFFFF, no final XOR), which is the bitwise
// complement of the standard zlib CRC that flate2 computes.
let mut c = Crc::new(); let mut c = Crc::new();
c.update(&image[off + 8..off + len]); c.update(&image[off + 8..off + len]);
if c.sum() != crc { if (c.sum() ^ 0xFFFF_FFFF) != crc {
off += 8; off += 8;
continue; continue;
} }