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Subject[PATCH] unlz4: always set an error return code on failures
"ret", being set to -1 early on, gets cleared by the first invocation
of lz4_decompress()/lz4_decompress_unknownoutputsize(), and hence
subsequent failures wouldn't be noticed by the caller without setting
it back to -1 right after those calls.

Reported-by: Matthew Daley <>
Signed-off-by: Jan Beulich <>
Cc: Kyungsik Lee <>
Cc: Andrew Morton <>

--- a/lib/decompress_unlz4.c
+++ b/lib/decompress_unlz4.c
@@ -141,6 +141,7 @@ STATIC inline int INIT unlz4(u8 *input,
goto exit_2;

+ ret = -1;
if (flush && flush(outp, dest_len) != dest_len)
goto exit_2;
if (output)

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