Mercurial > hg > nginx
annotate src/mail/ngx_mail_pop3_module.c @ 6272:b6a665bf858a
HTTP/2: fix indirect reprioritization.
Previously, streams that were indirectly reprioritized (either because of
a new exclusive dependency on their parent or because of removal of their
parent from the dependency tree), didn't have their pointer to the parent
node updated.
This broke detection of circular dependencies and, as a result, nginx
worker would crash due to stack overflow whenever such dependency was
introduced.
Found with afl-fuzz.
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
| author | Piotr Sikora <piotrsikora@google.com> |
|---|---|
| date | Thu, 01 Oct 2015 20:25:55 -0700 |
| parents | ec01b1d1fff1 |
| children | 73b451d304c0 |
| rev | line source |
|---|---|
| 521 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 521 | 5 */ |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_event.h> | |
| 1136 | 11 #include <ngx_mail.h> |
|
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12 #include <ngx_mail_pop3_module.h> |
| 521 | 13 |
| 14 | |
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15 static void *ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf); |
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16 static char *ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent, |
| 521 | 17 void *child); |
| 18 | |
| 19 | |
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20 static ngx_str_t ngx_mail_pop3_default_capabilities[] = { |
| 527 | 21 ngx_string("TOP"), |
| 22 ngx_string("USER"), | |
| 23 ngx_string("UIDL"), | |
| 24 ngx_null_string | |
| 25 }; | |
| 26 | |
| 27 | |
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28 static ngx_conf_bitmask_t ngx_mail_pop3_auth_methods[] = { |
| 1136 | 29 { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED }, |
| 30 { ngx_string("apop"), NGX_MAIL_AUTH_APOP_ENABLED }, | |
| 31 { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED }, | |
| 800 | 32 { ngx_null_string, 0 } |
| 33 }; | |
| 34 | |
| 35 | |
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36 static ngx_str_t ngx_mail_pop3_auth_plain_capability = |
| 809 | 37 ngx_string("+OK methods supported:" CRLF |
| 38 "LOGIN" CRLF | |
| 39 "PLAIN" CRLF | |
| 40 "." CRLF); | |
| 41 | |
| 42 | |
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43 static ngx_str_t ngx_mail_pop3_auth_cram_md5_capability = |
| 809 | 44 ngx_string("+OK methods supported:" CRLF |
| 45 "LOGIN" CRLF | |
| 46 "PLAIN" CRLF | |
| 47 "CRAM-MD5" CRLF | |
| 48 "." CRLF); | |
| 49 | |
| 50 | |
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51 static ngx_mail_protocol_t ngx_mail_pop3_protocol = { |
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52 ngx_string("pop3"), |
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53 { 110, 995, 0, 0 }, |
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54 NGX_MAIL_POP3_PROTOCOL, |
| 521 | 55 |
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56 ngx_mail_pop3_init_session, |
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57 ngx_mail_pop3_init_protocol, |
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58 ngx_mail_pop3_parse_command, |
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59 ngx_mail_pop3_auth_state, |
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60 |
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61 ngx_string("-ERR internal server error" CRLF), |
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62 ngx_string("-ERR SSL certificate error" CRLF), |
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63 ngx_string("-ERR No required SSL certificate" CRLF) |
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64 }; |
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65 |
| 587 | 66 |
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67 static ngx_command_t ngx_mail_pop3_commands[] = { |
| 521 | 68 |
| 527 | 69 { ngx_string("pop3_capabilities"), |
| 1136 | 70 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, |
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71 ngx_mail_capabilities, |
| 1136 | 72 NGX_MAIL_SRV_CONF_OFFSET, |
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73 offsetof(ngx_mail_pop3_srv_conf_t, capabilities), |
| 527 | 74 NULL }, |
| 75 | |
| 1136 | 76 { ngx_string("pop3_auth"), |
| 77 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, | |
| 800 | 78 ngx_conf_set_bitmask_slot, |
| 1136 | 79 NGX_MAIL_SRV_CONF_OFFSET, |
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80 offsetof(ngx_mail_pop3_srv_conf_t, auth_methods), |
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81 &ngx_mail_pop3_auth_methods }, |
| 800 | 82 |
| 521 | 83 ngx_null_command |
| 84 }; | |
| 85 | |
| 86 | |
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87 static ngx_mail_module_t ngx_mail_pop3_module_ctx = { |
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88 &ngx_mail_pop3_protocol, /* protocol */ |
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89 |
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90 NULL, /* create main configuration */ |
| 521 | 91 NULL, /* init main configuration */ |
| 92 | |
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93 ngx_mail_pop3_create_srv_conf, /* create server configuration */ |
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94 ngx_mail_pop3_merge_srv_conf /* merge server configuration */ |
| 521 | 95 }; |
| 96 | |
| 97 | |
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98 ngx_module_t ngx_mail_pop3_module = { |
| 521 | 99 NGX_MODULE_V1, |
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100 &ngx_mail_pop3_module_ctx, /* module context */ |
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101 ngx_mail_pop3_commands, /* module directives */ |
| 1136 | 102 NGX_MAIL_MODULE, /* module type */ |
| 541 | 103 NULL, /* init master */ |
| 521 | 104 NULL, /* init module */ |
| 541 | 105 NULL, /* init process */ |
| 106 NULL, /* init thread */ | |
| 107 NULL, /* exit thread */ | |
| 108 NULL, /* exit process */ | |
| 109 NULL, /* exit master */ | |
| 110 NGX_MODULE_V1_PADDING | |
| 521 | 111 }; |
| 112 | |
| 113 | |
| 114 static void * | |
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115 ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf) |
| 577 | 116 { |
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117 ngx_mail_pop3_srv_conf_t *pscf; |
| 641 | 118 |
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119 pscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_pop3_srv_conf_t)); |
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120 if (pscf == NULL) { |
| 527 | 121 return NULL; |
| 521 | 122 } |
| 123 | |
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124 if (ngx_array_init(&pscf->capabilities, cf->pool, 4, sizeof(ngx_str_t)) |
| 1136 | 125 != NGX_OK) |
| 126 { | |
| 127 return NULL; | |
| 128 } | |
| 129 | |
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130 return pscf; |
| 521 | 131 } |
| 132 | |
| 133 | |
| 134 static char * | |
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135 ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
| 521 | 136 { |
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137 ngx_mail_pop3_srv_conf_t *prev = parent; |
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138 ngx_mail_pop3_srv_conf_t *conf = child; |
| 521 | 139 |
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140 u_char *p; |
| 1136 | 141 size_t size, stls_only_size; |
| 527 | 142 ngx_str_t *c, *d; |
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143 ngx_uint_t i; |
| 1136 | 144 |
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145 ngx_conf_merge_bitmask_value(conf->auth_methods, |
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146 prev->auth_methods, |
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147 (NGX_CONF_BITMASK_SET |
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148 |NGX_MAIL_AUTH_PLAIN_ENABLED)); |
| 800 | 149 |
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150 if (conf->capabilities.nelts == 0) { |
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151 conf->capabilities = prev->capabilities; |
| 800 | 152 } |
| 153 | |
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154 if (conf->capabilities.nelts == 0) { |
| 527 | 155 |
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156 for (d = ngx_mail_pop3_default_capabilities; d->len; d++) { |
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157 c = ngx_array_push(&conf->capabilities); |
| 527 | 158 if (c == NULL) { |
| 159 return NGX_CONF_ERROR; | |
| 160 } | |
| 161 | |
| 162 *c = *d; | |
| 163 } | |
| 164 } | |
| 165 | |
| 166 size = sizeof("+OK Capability list follows" CRLF) - 1 | |
| 167 + sizeof("." CRLF) - 1; | |
| 168 | |
| 1136 | 169 stls_only_size = size + sizeof("STLS" CRLF) - 1; |
| 170 | |
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171 c = conf->capabilities.elts; |
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172 for (i = 0; i < conf->capabilities.nelts; i++) { |
| 527 | 173 size += c[i].len + sizeof(CRLF) - 1; |
| 1136 | 174 |
| 175 if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) { | |
| 176 continue; | |
| 177 } | |
| 178 | |
| 179 stls_only_size += c[i].len + sizeof(CRLF) - 1; | |
| 527 | 180 } |
| 181 | |
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182 if (conf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) { |
| 809 | 183 size += sizeof("SASL LOGIN PLAIN CRAM-MD5" CRLF) - 1; |
| 184 | |
| 185 } else { | |
| 186 size += sizeof("SASL LOGIN PLAIN" CRLF) - 1; | |
| 187 } | |
| 188 | |
| 2049 | 189 p = ngx_pnalloc(cf->pool, size); |
| 583 | 190 if (p == NULL) { |
| 527 | 191 return NGX_CONF_ERROR; |
| 192 } | |
| 193 | |
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194 conf->capability.len = size; |
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195 conf->capability.data = p; |
| 583 | 196 |
| 197 p = ngx_cpymem(p, "+OK Capability list follows" CRLF, | |
| 198 sizeof("+OK Capability list follows" CRLF) - 1); | |
| 527 | 199 |
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200 for (i = 0; i < conf->capabilities.nelts; i++) { |
| 583 | 201 p = ngx_cpymem(p, c[i].data, c[i].len); |
| 202 *p++ = CR; *p++ = LF; | |
| 527 | 203 } |
| 204 | |
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205 if (conf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) { |
| 809 | 206 p = ngx_cpymem(p, "SASL LOGIN PLAIN CRAM-MD5" CRLF, |
| 207 sizeof("SASL LOGIN PLAIN CRAM-MD5" CRLF) - 1); | |
| 208 | |
| 209 } else { | |
| 210 p = ngx_cpymem(p, "SASL LOGIN PLAIN" CRLF, | |
| 211 sizeof("SASL LOGIN PLAIN" CRLF) - 1); | |
| 212 } | |
| 213 | |
| 583 | 214 *p++ = '.'; *p++ = CR; *p = LF; |
| 215 | |
| 216 | |
| 217 size += sizeof("STLS" CRLF) - 1; | |
| 527 | 218 |
| 2049 | 219 p = ngx_pnalloc(cf->pool, size); |
| 583 | 220 if (p == NULL) { |
| 221 return NGX_CONF_ERROR; | |
| 222 } | |
| 223 | |
|
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f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
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224 conf->starttls_capability.len = size; |
|
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
|
225 conf->starttls_capability.data = p; |
| 583 | 226 |
|
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f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
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227 p = ngx_cpymem(p, conf->capability.data, |
|
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
|
228 conf->capability.len - (sizeof("." CRLF) - 1)); |
| 583 | 229 |
| 230 p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1); | |
| 231 *p++ = '.'; *p++ = CR; *p = LF; | |
| 527 | 232 |
| 233 | |
|
1487
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
|
234 if (conf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) { |
|
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
|
235 conf->auth_capability = ngx_mail_pop3_auth_cram_md5_capability; |
| 809 | 236 |
| 237 } else { | |
|
1487
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
|
238 conf->auth_capability = ngx_mail_pop3_auth_plain_capability; |
| 809 | 239 } |
| 240 | |
| 241 | |
| 2049 | 242 p = ngx_pnalloc(cf->pool, stls_only_size); |
| 1136 | 243 if (p == NULL) { |
| 244 return NGX_CONF_ERROR; | |
| 245 } | |
| 246 | |
|
1487
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
|
247 conf->starttls_only_capability.len = stls_only_size; |
|
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
|
248 conf->starttls_only_capability.data = p; |
| 1136 | 249 |
| 250 p = ngx_cpymem(p, "+OK Capability list follows" CRLF, | |
| 251 sizeof("+OK Capability list follows" CRLF) - 1); | |
| 252 | |
|
1487
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1481
diff
changeset
|
253 for (i = 0; i < conf->capabilities.nelts; i++) { |
| 1136 | 254 if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) { |
| 255 continue; | |
| 256 } | |
| 257 | |
| 258 p = ngx_cpymem(p, c[i].data, c[i].len); | |
| 259 *p++ = CR; *p++ = LF; | |
| 260 } | |
| 261 | |
| 262 p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1); | |
| 263 *p++ = '.'; *p++ = CR; *p = LF; | |
| 264 | |
| 521 | 265 return NGX_CONF_OK; |
| 266 } |