Mercurial > hg > nginx
annotate src/core/ngx_murmurhash.c @ 7978:2ca57257252d
Core: fixed ngx_pcre_studies cleanup.
If a configuration parsing fails for some reason, ngx_regex_module_init()
is not called, and ngx_pcre_studies remained set despite the fact that
the pool it was allocated from is already freed. This might result in
a segmentation fault during runtime regular expression compilation, such
as in SSI, for example, in the single process mode, or if a worker process
died and was respawned from a master process in such an inconsistent state.
Fix is to clear ngx_pcre_studies from the pool cleanup handler (which is
anyway used to free JIT-compiled patterns).
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Sat, 25 Dec 2021 01:07:10 +0300 |
parents | f38647c651a8 |
children |
rev | line source |
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3891 | 1 |
2 /* | |
3 * Copyright (C) Austin Appleby | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 | |
10 | |
11 uint32_t | |
12 ngx_murmur_hash2(u_char *data, size_t len) | |
13 { | |
14 uint32_t h, k; | |
15 | |
16 h = 0 ^ len; | |
17 | |
18 while (len >= 4) { | |
19 k = data[0]; | |
20 k |= data[1] << 8; | |
21 k |= data[2] << 16; | |
22 k |= data[3] << 24; | |
23 | |
24 k *= 0x5bd1e995; | |
25 k ^= k >> 24; | |
26 k *= 0x5bd1e995; | |
27 | |
28 h *= 0x5bd1e995; | |
29 h ^= k; | |
30 | |
31 data += 4; | |
32 len -= 4; | |
33 } | |
34 | |
35 switch (len) { | |
36 case 3: | |
37 h ^= data[2] << 16; | |
6994
f38647c651a8
Added missing "fall through" comments (ticket #1259).
Maxim Dounin <mdounin@mdounin.ru>
parents:
3891
diff
changeset
|
38 /* fall through */ |
3891 | 39 case 2: |
40 h ^= data[1] << 8; | |
6994
f38647c651a8
Added missing "fall through" comments (ticket #1259).
Maxim Dounin <mdounin@mdounin.ru>
parents:
3891
diff
changeset
|
41 /* fall through */ |
3891 | 42 case 1: |
43 h ^= data[0]; | |
44 h *= 0x5bd1e995; | |
45 } | |
46 | |
47 h ^= h >> 13; | |
48 h *= 0x5bd1e995; | |
49 h ^= h >> 15; | |
50 | |
51 return h; | |
52 } |