Merge pull request #371 from IoT-Inspector/elf-kernel-initramfs-padding-fix

martonilles · web-flow · commit 4a6c871dae68 · 2022-05-10T21:23:00.000+02:00
elf: fixed kernel initramfs padding calculation
diff --git a/unblob/handlers/executable/elf.py b/unblob/handlers/executable/elf.py
@@ -73,7 +73,7 @@ def extract_initramfs(self, elf, inpath, outdir):
                     endian=endian,
                 )
 
-            padding = round_up(initramfs_size, 8) - initramfs_size
+            padding = round_up(initramfs_size + 4, 8) - initramfs_size - 4
             initramfs_end = initramfs_size_offset - padding
             initramfs_start = initramfs_end - initramfs_size
 

Original file line number	Diff line number	Diff line change
`@@ -73,7 +73,7 @@ def extract_initramfs(self, elf, inpath, outdir):`
`73`	`73`	`endian=endian,`
`74`	`74`	`)`
`75`	`75`
`76`		`- padding = round_up(initramfs_size, 8) - initramfs_size`
	`76`	`+ padding = round_up(initramfs_size + 4, 8) - initramfs_size - 4`
`77`	`77`	`initramfs_end = initramfs_size_offset - padding`
`78`	`78`	`initramfs_start = initramfs_end - initramfs_size`
`79`	`79`