Hello Sven Schmidt,
This is a semi-automatic email about new static checker warnings.
The patch e355e356f87b: "lib: update LZ4 compressor module" from Jan
25, 2017, leads to the following Smatch complaint:
lib/lz4/lz4_compress.c:890 lz4_compress()
warn: variable dereferenced before check 'dst_len' (see line 880)
lib/lz4/lz4_compress.c
879 size_t *dst_len, void *wrkmem) {
880 *dst_len = LZ4_compress_default(src, dst, (int)src_len,
^^^^^^^
Dereference.
881 (int)((size_t)dst_len), wrkmem);
882
883 /*
884 * Prior lz4_compress will return -1 in case of error
885 * and 0 on success
886 * while new LZ4_compress_fast/default
887 * returns 0 in case of error
888 * and the output length on success
889 */
890 if (!dst_len)
^^^^^^^
Checked too late. Can this test just be deleted?
891 return -1;
892 else
regards,
dan carpenter
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