Exceptions do not work when processing requests with long paths (kinopoisk.ru)

[dimisa-RUAdList]

Google Chrome 84.0.4147.125
uBlock Origin 1.28.4 default + RU AdList

Firefox 79.0
uBlock Origin 1.29.0 default + RU AdList

How to reproduce
Open: https://www.kinopoisk.ru/media/video/4002311/
Refresh the page several times.

Regular expression /^https?://www\.kinopoisk\.ru/[^\s]{300,}/$popup,subdocument,domain=www.kinopoisk.ru
will block a frame with a path like:
https://www.kinopoisk.ru/1t5O5H170/4960867nE/VxgT4Bsgza-uFjtqf9PVZqHzLX3DZ0QOaCi0p46vBoy_CbkK9W5sZpCtbbiIhDypWO6GoMgok-5VHCapV2ogZJekA-xCSMWGrhJvB2fStWLFg-m8g_vcElVMIDfaE4KsmyhNcj2ybIaUKJ1skIFkTZzirnw0qGsiQQQyPecGSCjrDBekE9R9Cr4SP6OTKkyKnevFbc-XSNbBxCQnIoNKLFfw0fL1NnyiDCwNtHTdkIEMPp447AhD1mGMHmmrQgDYkxRvrNNcSWLC_u-fU7LE7tHTWRFLz8hOATSIBzbTdnjvzAn-CcYMLsQ4cbTIjWDZ8L4KsCDYj4rBcL5dczLgqLuM42B3JKlimv4DX-PCpAa5Sz3Nn3tU8tUwIE_mc2J4U9TN-slibJIoZAHs0DlUCeSOAojIDL8ybSTOHU_qQCCjFBeEr3xVQjaCR-NLLny-zfsxVRvLLG4VSOyH6k92UJOorRKlHtTutKBdNFDpJAXkRvY8JJgL2oXw-kUnYtB0GwzTkD9MdTLahhtbd8JUkinj_ZUL37CKWTRoaxo7AjwvnGHW6brwDsxk_SxcURA1_IL2NOysa07dpJZl_xLAmDcgk3gjyEVuzv7_M_9erEapb8kRZ-8Iqp1AjMemy-okH1htBr0WbBZorBlAyNGUXVyC2qwM_LMuybBi_af6ZOQ_qB84XzwlwjbGO5MjAsiWvRtNZUsHIA5hGADjpi_2jNsgQTo1fuzyZMQJWGD9tF3YerbADHjz2rm05t2rAiwcu1SfjBvAXfrWfoeXh6J8jqHTVXm7s3yW6ZD0hyYzWqgf0CUC2YpUujg01dxQeTC15OJeACjk67YRWB6dz6YsuBfY86SnaD3Ksh4r46smPEJlA6H1qx-0euEsnP8KN9qQl6QJliWmTAIE9A1YGNUQzdjKhpBMnH8m3bBqCXsCMLwThHP8E9yxYvbK4-sfEgge2d9B5TML9Bal_CDDGqNuSI8Q4So9ZgSyjGBJ1HhJEEHAtjYwQFhzpgFY_ll7jhQgU5SHcM-s-WaKqn8vc_as8m1_LVHru9zKcXS4j-J_HnxvEEGG_arY_qQk5QyQPTzxRD6aMAgcv_KxSHLRR3JQzOu0F1CLUFkSkrYDG6P2sHqpa33VS_PIzvGIsFvat8LYv8SBFqGebGogCPHIlGHUoeSKipC0hPtGuUyKZSumXFSngOu0U9xhut6ez29nDlD6yUvFkRNjCAYFjIxzGkcCPMtAgTI9giBSiEhlVIx9ZKX8GkYQNGR7QoUI5k0vAmxEdziLhM90AabC7jvra9bIQoFPOdEzezzKDbg8XxIfRhTnJB3OWf5UuuB4QUTE7ai9LJI2lJBwQ479CHYBf7aQ4Fu02yCTwL2uchI3rw_auGpFNwmNF2fAFo2QPNNaAwaACyBR-lGezGpMXH0ojAnYSdhSGrBMnA8-hZzuwVMODKwTtIcch1DBBvIquwufDlAeoVulASPDOI6NGBj3psdmuAM4IT61CkyCKMDtJNAJZMUQ4hqApGRzmvkghoXbNpTUe7BnkLtU_eJeGqePz6pIYolv0dXDd1xiYdBke2YPwowXSFEuVYLMKuxURTCwcVSpZLoyLJzU68qNMP4ZM7JAsK9Qf9C_LGH6zqJPNytaWNItl7XFpz98DmF8GM-qK0rESzw1jr3uoPrEIFXIxO00Vcg-njyAaLsm-YRuledqYEw3-I9U-7hBKloqFy9vuoCCbZuxgVubyM7N2DDztpMKiOcQPUJxnmya_NDdQARpYG0IZgp4jCy_Xm0ACr1f9hBU59DXdANIzQ5CIstv-0IcdsXHHdnbEzgObUwkV34LesAnOD0qXYJcqiCoGWBgYdxl4PaCkAh0O1pJHPLtR6awWAcY46SjPNHCPoYjN_t-HOZdP6FxZ_fscgm4zPP6twKIJwSVCnmq7N7MpMX8gJVU-ZjySpwc9PuaXciqbQuuRMwXBEsgW1jhmr52k3MD1kz6CUOR5ePH7EqNXJxjfstOlEuAGY5V4uAClEBpRNhRUEGoziKEKBwnNrmUSu1zihDIU3j_LIMo_eoyluPjl6IcylmHMQEza9gClYT4I-pPSoAbqJ1C3a4UUqDkeXy0YRj94ErGaDSw27plzO7tU-rYUDdEE4SDWFEyUh5_N8vevJ6ZB01Rx2voToWQ4OdSB2oIF8wdTt1KqCrwzDHQZGk8ofwGzghgWPsqiZwCaXNKpOhXwBcE22A5pk6C__9vIjiSHZ-xIS9DPEaFvBy_4tPScC8gpfqBxuS6bFydhFjdqOnYNsqQmIjT2n0AbnH7dqTEpwB7CDcofaqysrt7Ez6Q1rWL3U1ju-gK-fygOy7ffogLtNmqXWb8sjC8FTx4veDRRHYm4ADwL5b9yD5Z_6Yw8OPYW-hb9Nn6dk47Wx8O-IpBb8FxNxtAEpXYGLeCU77UHwS1zk0-IOIYzG2ATFWw2exqivhIVN8yhUASiVMqUCxnBBMQe6gxptqap_uL2hwymedBSSfr7J7lXByzEouS8BsszbI1egBivCiBXJxBzO2sVtogOLCjdh0U_mUjbijsmxjrWBtERepWziczl0aEEpmLsQ3TP7ge0bBM4-b_ZojTAK3-yebIfmQgDSh4MdTJHMqW4DhwW6rtAALtczLYcINci7wnFHFq0nozF1_GzBqxz5lpL2-o3kmUTH8C947I08AB0m12dAK8tPXsaH0oKVyGhgxQiOvewdjGjWcKxFhvNPs0M6Qp6ko2g4MD0kzWOX8Jzbuf3B4V2PB7Wlf68IuAbVIpHpw6eITB6FAZrLUMCi4YWDCPhvk4_lnzejhka9xPrPfEXTKuEhcPl1qMChFnsXkbw8heYQg0x3J3HgCDSO3SaYYEDvjMuSh4dSC19H6ywMzwK6bxeD5tR8rU5IsgHyiLVFV-copvd5e23MoZ_7Wpx9dwUhWEfOOOn8r4ozgxIkHG0Jqo9MU8RHGgRWBWunikJKtShVgE/dist/embed.html?frameId=frame32706

In this case, the exception @@||www.kinopoisk.ru^*/dist/embed.html?frameId=$subdocument,domain=www.kinopoisk.ru is not working.

This problem does not exist when using Adblock Plus.

[mapx-]

parsing correctly the first 2096 bytes

[mapx-]

maybe the bug was introduced here:
uBlock-LLC/uBlock@ab15132

and currently the code in utils.js

    // https://github.com/chrisaljoudi/uBlock/issues/1118
    // We limit to a maximum number of tokens.

    _tokenize(encodeInto) {
        const tokens = this._tokens;
        let url = this._urlOut;
        let l = url.length;
        if ( l === 0 ) { return 0; }
        if ( l > 2048 ) {
            url = url.slice(0, 2048);
            l = 2048;
        }

[dimisa-RUAdList]

For now, I've disabled the blocking rule for uBlock Origin users so that they can use the site normally. But I think there are other cases when the rules do not work correctly.

[gorhill]

This isn't trivial to fix, because this involves revisiting a lot of optimizations, including in WASM modules. With WASM, buffer size have to be preset, so I can't just change the slice value to fix this.

A workaround for when the target URL to match may be longer than the buffer size (2048 characters) is to force the filter to be parsed as a generic one, like so:

@@||www.kinopoisk.ru^**/dist/embed.html?frameId=$subdocument,domain=www.kinopoisk.ru

Without the extra wildcard, the filter is optimized as a ^*-separated dual patterns. Simply adding a wildcard defuse this optimization and the pattern is then evaluated as a plain generic filter representation -- no typed array involved. I don't think the extra wildcard would be an issue with ABP.

[dimisa-RUAdList]

Yes, it works.
Fix

[WizardShotTheFood]

I ran into the same issue with a chatbro.com embed. Gorhill's workaround worked there as well.

[gwarser]

/\.clstorage\.net/[^\s]{300,}/$popup,subdocument,domain=www.kinopoisk.ru
@@||clstorage.net^*/dist/embed.html?frameId=$subdocument,domain=www.kinopoisk.ru