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SIGSEGV при запуске на OpenWrt 23.05.5 #197

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InHavk opened this issue Nov 30, 2024 · 6 comments
Closed

SIGSEGV при запуске на OpenWrt 23.05.5 #197

InHavk opened this issue Nov 30, 2024 · 6 comments
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bug Something isn't working

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@InHavk
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InHavk commented Nov 30, 2024

Bug description

Sat Nov 30 20:36:27 2024 kern.info kernel: [ 4352.204440] ra  = 00401f1b in youtubeUnblock[400000+9000]
Sat Nov 30 20:36:27 2024 kern.info kernel: [ 4352.189710] do_page_fault(): sending SIGSEGV to youtubeUnblock for invalid write access to 00000000
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Queue 537 started
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Target sni domains: googlevideo.com,ggpht.com,ytimg.com,youtube.com,play.google.com,youtu.be,googleapis.com,googleusercontent.com,gstatic.com,l.google.com,
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Past seq faking strategy will be used
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Fragmentation Client Hello will be reversed
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Fake SNI will be sent before each target client hello
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Using TCP segmentation
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Section #0
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: The sections will be processed in order they goes in this output
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Detected 1 config sections
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: IPv6 is enabled
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: GSO is enabled
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]:
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: Bypasses deep packet inspection systems that rely on SNI
Sat Nov 30 20:36:26 2024 daemon.info youtubeUnblock[4714]: youtubeUnblock 1.0.0-4

Собран от коммита 7303abd

buildbot@e9f16b0068cc:~/openwrt-sdk-23.05.5-ath79-generic_gcc-12.3.0_musl.Linux-x86_64$ grep "PKG_REV" package/feeds/youtubeUnblock/youtubeUnblock/Makefile
PKG_REV:=7303abdaf2809f0db53efb6ed1b206ab79694a24

Самое долгое что прожил - 30 секунд, в основном сразу падает.

Linux distribution

OpenWRT

Device architecture

DISTRIB_ID='OpenWrt'
DISTRIB_RELEASE='23.05.5'
DISTRIB_REVISION='r24106-10cc5fcd00'
DISTRIB_TARGET='ath79/generic'
DISTRIB_ARCH='mips_24kc'
DISTRIB_DESCRIPTION='OpenWrt 23.05.5 r24106-10cc5fcd00'
DISTRIB_TAINTS=''

Configuration

config youtubeUnblock 'youtubeUnblock'
option frag 'tcp'
option frag_sni_reverse '1'
option frag_middle_sni '1'
option frag_sni_pos '1'
option fk_winsize '0'
option seg2delay '0'
option packet_mark '32768'
option fake_sni '1'
option faking_strategy 'pastseq'
option fake_sni_seq_len '1'
option fake_sni_type 'default'
list sni_domains 'googlevideo.com'
list sni_domains 'ggpht.com'
list sni_domains 'ytimg.com'
list sni_domains 'youtube.com'
list sni_domains 'play.google.com'
list sni_domains 'youtu.be'
list sni_domains 'googleapis.com'
list sni_domains 'googleusercontent.com'
list sni_domains 'gstatic.com'
list sni_domains 'l.google.com'
@Waujito
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Waujito commented Nov 30, 2024 •
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Очень странно, у меня такого не случалось. Если отсюда скачать https://github.com/Waujito/youtubeUnblock/actions/runs/12090255264 (mips_24kc) что будет? Также убедитесь что все существующие анблоки не работают и попробуйте запустить его вручную с трейс флагом /usr/bin/youtubeUnblock --trace

@InHavk
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InHavk commented Nov 30, 2024

Проблема повторилась.

root@OpenWrt:~# /usr/bin/youtubeUnblock --sni-domains=googlevideo.com,ggpht.com,ytimg.com,youtube.com,play.google.com,youtu.be,googleapis.com,googleusercontent.com,gstatic.com,l.google.com, --fake-sni-seq-len=1 --faking-strategy=pastseq --frag=tcp --frag-sni-pos=1 --fk-winsize=0 --seg2delay=0 --packet-mark=32768 --fake-sni=1 --frag-sni-reverse=1 --frag-sni-faked=0 --frag-middle-sni=1 --synfake=0 --trace
youtubeUnblock 1.0.0-4
Bypasses deep packet inspection systems that rely on SNI

GSO is enabled
IPv6 is enabled
Detected 1 config sections
The sections will be processed in order they goes in this output
Section #0
Using TCP segmentation
Fake SNI will be sent before each target client hello
Fragmentation Client Hello will be reversed
Past seq faking strategy will be used
Target sni domains: googlevideo.com,ggpht.com,ytimg.com,youtube.com,play.google.com,youtu.be,googleapis.com,googleusercontent.com,gstatic.com,l.google.com,
Queue 537 started
[TRACE]  ( IPv4, TCP, Section #0, TLS analyzed, continue_flow, ) 
[TRACE]  ( IPv4, TCP, Section #0, TLS analyzed, continue_flow, ) 
[TRACE]  ( IPv4, TCP, Section #0, TLS analyzed, continue_flow, ) 
[TRACE]  ( IPv4, TCP, Section #0, TLS analyzed, continue_flow, ) 
Segmentation fault

Из замеченного сейчас - краш только в момент обработки пакетов с youtube. Пока этого трафика нет - все работает отлично.
До этого видимо было какое-то устройство, которое из сети ломилось туда, но я не обратил на это внимание.

@Waujito
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Waujito commented Nov 30, 2024 •
edited
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Самый важный лог не отправился из-за сегфолта) Дайте ему флаг --syslog и, после того как крашнется, сделайте logread -l 100

@InHavk
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InHavk commented Dec 1, 2024 

...
Sun Dec  1 12:35:45 2024 user.info : [TRACE]  (
Sun Dec  1 12:35:45 2024 user.info : IPv4,
Sun Dec  1 12:35:45 2024 user.info : TCP,
Sun Dec  1 12:35:45 2024 user.info : Section #0,
Sun Dec  1 12:35:45 2024 user.info : TLS analyzed,
Sun Dec  1 12:35:45 2024 user.info : continue_flow,
Sun Dec  1 12:35:45 2024 user.info : )
Sun Dec  1 12:35:47 2024 user.info : [TRACE]  (
Sun Dec  1 12:35:47 2024 user.info : IPv4,
Sun Dec  1 12:35:47 2024 user.info : UDP,
Sun Dec  1 12:35:47 2024 user.info : Section #0,
Sun Dec  1 12:35:47 2024 user.info : UDP payload start: [ 46 ec 57 0b 40 be 12 25 db e4 ],
Sun Dec  1 12:35:47 2024 user.info : continue_flow,
Sun Dec  1 12:35:47 2024 kern.info kernel: [43954.640040] do_page_fault(): sending SIGSEGV to youtubeUnblock for invalid write access to 00000000
Sun Dec  1 12:35:47 2024 kern.info kernel: [43954.650013] epc = 77da29cc in libc.so[77d7e000+ab000]
Sun Dec  1 12:35:47 2024 kern.info kernel: [43954.655369] ra  = 00401f1b in youtubeUnblock[400000+9000]

Waujito added a commit that referenced this issue Dec 1, 2024
@Waujito
Fix SIGSEGV/stacksmash in UDP logger.
aefabe7 
The bug was reported in #197. Caused by insufficient size of logging
buffer.
@Waujito Waujito added the bug Something isn't working label Dec 1, 2024
@Waujito
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Waujito commented Dec 1, 2024

Кто-то не умеет считать :) при логировании UDP пакета буфер переполнялся.
Спасибо за оперативное тестирование и репорт! Все версии обновил. Можете либо самостоятельно собирать, либо скачать из Actions: https://github.com/Waujito/youtubeUnblock/actions/runs/12106718808

@Waujito
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Waujito commented Dec 2, 2024

Полагаю, проблема ушла, закрываю issue.

@Waujito Waujito closed this as completed Dec 2, 2024
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