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igzip: Use unaligned load on static header to fix usan

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Clang with sanitizer on was catching on cast of static header.
Switching to uload64 macro for better general solution.

Change-Id: I495d440407bb1773841e2f7cdc48bd95fc1a2df4
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
This commit is contained in:
Greg Tucker 2020-11-04 12:29:37 -07:00
parent 269df8a67d
commit dca9dd221e
1 changed files with 2 additions and 2 deletions
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4
igzip/igzip_inflate.c
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@ -943,12 +943,12 @@ static int header_matches_pregen(struct inflate_state *state)
uint32_t bytes_read_in, header_len, last_bits, last_bit_mask;
uint64_t bits_read_mask;
uint64_t hdr_stash, in_stash;
const uint32_t bits_read_prior = 3; // Have read bfinal(1) and btype(2)
const uint64_t bits_read_prior = 3; // Have read bfinal(1) and btype(2)
/* Check if stashed read_in_bytes match header */
hdr = &(hufftables_default.deflate_hdr[0]);
bits_read_mask = (1ull << state->read_in_length) - 1;
hdr_stash = (*((uint64_t *) hdr) >> bits_read_prior) & bits_read_mask;
hdr_stash = (load_u64(hdr) >> bits_read_prior) & bits_read_mask;
in_stash = state->read_in & bits_read_mask;
if (hdr_stash != in_stash)