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Subject[PATCH] initramfs: fix "Decoding failed"
Date
From: Hongfei Shang <shanghongfei@kylinos.cn>

when initrd image file load in memory, it is align to 4 bytes,
so there are may be some padding bytes(<4),
should ignore these padding bytes and handle as normal end

before: (when size of initrd.img is: size%4 = 1, 2 or 3)
"Initramfs unpacking failed: Decoding failed"

after:
no error message

Signed-off-by: Hongfei Shang <shanghongfei@kylinos.cn>
---
lib/decompress_unlz4.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/lib/decompress_unlz4.c b/lib/decompress_unlz4.c
index c0cfcfd486be..7527f1541dfd 100644
--- a/lib/decompress_unlz4.c
+++ b/lib/decompress_unlz4.c
@@ -181,6 +181,14 @@ STATIC inline int INIT unlz4(u8 *input, long in_len,
goto exit_2;
}
inp += chunksize;
+
+ if (size < 4) {
+ unsigned int padding = 0;
+
+ memcpy(&padding, inp, size);
+ if (padding == 0)
+ break;
+ }
}
}

--
2.25.1
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