[squid-users] Squid BUG: assurance failed: tok.skip(WellKnownUrlPathPrefix())

Alex Rousskov rousskov at measurement-factory.com
Tue Sep 12 17:28:05 UTC 2023 

On 2023-09-12 13:06, Loučanský Lukáš wrote:
> Is this anyhow interesting?

Not really, IMO -- the problem happens earlier. I can confirm that you 
are running v6.3-based code. Let's call that progress :-).

Can you share the a _pointer_ to a compressed ALL,9 cache.log file while 
reproducing the problem using a single transaction?

https://wiki.squid-cache.org/SquidFaq/BugReporting#debugging-a-single-transaction

Alex.

> 
> 2023/09/12 18:47:04.267 kid4| 24,8| SBuf.cc(30) SBuf: SBuf15514952 created
> 2023/09/12 18:47:04.267 kid4| 24,8| SBuf.cc(30) SBuf: SBuf15514953 created
> 2023/09/12 18:47:04.267 kid4| 24,8| SBuf.cc(30) SBuf: SBuf15514954 created
> 2023/09/12 18:47:04.267 kid4| 24,7| SBuf.cc(85) assign: assigning 
> SBuf15514952 from SBuf15514912
> 2023/09/12 18:47:04.267 kid4| 24,8| SBuf.cc(38) SBuf: SBuf15514955 
> created from id SBuf15514915
> 2023/09/12 18:47:04.267 kid4| 24,8| SBuf.cc(445) startsWith: 
> SBuf15514955 startsWith SBuf125812, caseSensitive: 0
> 2023/09/12 18:47:04.267 kid4| 24,8| SBuf.cc(447) startsWith: no, too short
> 2023/09/12 18:47:04.267 kid4| 24,8| Tokenizer.cc(185) skip: no match, 
> not skipping '/squid-internal-mgr/'
> 2023/09/12 18:47:04 kid4| ERROR: Squid BUG: assurance failed: 
> tok.skip(WellKnownUrlPathPrefix())
> 2023/09/12 18:47:04.268 kid4| 24,8| SBuf.cc(70) ~SBuf: SBuf15514955 
> destructed
> 
> 
> BTW debug 24,9 makes pretty big log files... :-)
> 
> L
> 
> -----Původní zpráva-----
> Od: squid-users za uživatele Loučanský Lukáš
> Odesláno: út 12.9.2023 18:23
> Komu: squid-users at lists.squid-cache.org
> Předmět: Re: [squid-users] Squid BUG: assurance failed: 
> tok.skip(WellKnownUrlPathPrefix())
> 
> Hello Alex - here is the output of squid -v command:
> 
> squid -v
> Squid Cache: Version 6.3-20230903-ra9c06aa6a
> Service Name: squid
> no IPV6
> 
> This binary uses OpenSSL 1.1.1n  15 Mar 2022. For legal restrictions on 
> distribution see https://www.openssl.org/source/license.html 
> <https://www.openssl.org/source/license.html>
> 
> configure options:  '--build=x86_64-linux-gnu' '--prefix=/usr' 
> '--includedir=/include' '--mandir=/share/man' '--infodir=/share/info' 
> '--sysconfdir=/etc' '--localstatedir=/var' '--libexecdir=/lib/squid5' 
> '--disable-maintainer-mode' '--disable-silent-rules' 
> '--datadir=/usr/share/squid5' '--sysconfdir=/etc/squid5' 
> '--mandir=/usr/share/man' '--enable-build-info=no IPV6' 
> '--enable-inline' '--enable-arp-acl' '--disable-wccp' '--disable-wccp2' 
> '--disable-htcp--disable-arch-native' '--disable-ipv6' 
> '--enable-optimizations' '--enable-storeio=ufs,aufs,diskd,rock' 
> '--enable-removal-policies=lru,heap' '--enable-delay-pools' 
> '--enable-cache-digests' '--enable-icap-client' 
> '--enable-follow-x-forwarded-for' 
> '--enable-auth-basic=DB,fake,getpwnam,LDAP,NCSA,NIS,PAM,POP3,RADIUS,SASL,SMB' '--enable-auth-digest=file,LDAP' '--enable-auth-negotiate=kerberos,wrapper' '--enable-auth-ntlm=fake,SMB_LM' '--enable-external-acl-helpers=file_userip,kerberos_ldap_group,LDAP_group,session,SQL_session,time_quota,unix_group,wbinfo_group' '--enable-url-rewrite-helpers=fake' '--enable-security-cert-validators=fake' '--enable-storeid-rewrite-helpers=file' '--enable-eui' '--enable-esi' '--enable-icmp' '--enable-zph-qos' '--enable-ecap' '--enable-snmp' '--disable-ident-lookups' '--disable-translation' '--with-swapdir=/var/spool/squid5' '--with-logdir=/var/log/squid5' '--with-pidfile=/var/run/squid5.pid' '--with-large-files' '--with-default-user=proxy' '--with-openssl' '--with-filedescriptors=8192' '--enable-ssl-crtd' '--enable-security-cert-generators' '--enable-security-cert-validators' '--enable-linux-netfilter' '--enable-stacktraces' 'PKG_CONFIG_PATH=:/usr/local/lib/pkgconfig:/usr/lib64/pkgconfig:/usr/share/pkgconfig' 'CFLAGS=-g -O2 -m64 -fPIE -fstack-protector-strong -Wformat -Werror=format-security -Wall' 'LDFLAGS=-fPIE -pie -Wl,-z,relro -Wl,-z,now' 'CPPFLAGS=-D_FORTIFY_SOURCE=2' 'CXXFLAGS=-g -O2 -m64 -fPIE -fstack-protector-strong -Wformat -Werror=format-security' 'build_alias=x86_64-linux-gnu'
> 
> Please note two things - I was using 5.x branch for some time (ie. 
> squid5 prefix) and lately did upgrade to 6.x as the developers said 5.x 
> is EOL/not maintained, I do not have native ipv6 so I had some tun6to4 
> tunel to closed broker - so now I do not have ipv6 connectivity. So I 
> decided to set --disable-ipv6 for now.
> 
> I have gcc
>   gcc -v
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
> OFFLOAD_TARGET_NAMES=nvptx-none
> OFFLOAD_TARGET_DEFAULT=1
> Target: x86_64-linux-gnu
> Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-6' 
> --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs 
> <file:///usr/share/doc/gcc-8/README.Bugs> 
> --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ 
> --prefix=/usr --with-gcc-major-version-only --program-suffix=-8 
> --program-prefix=x86_64-linux-gnu- --enable-shared 
> --enable-linker-build-id --libexecdir=/usr/lib 
> --without-included-gettext --enable-threads=posix --libdir=/usr/lib 
> --enable-nls --enable-bootstrap --enable-clocale=gnu 
> --enable-libstdcxx-debug --enable-libstdcxx-time=yes 
> --with-default-libstdcxx-abi=new --enable-gnu-unique-object 
> --disable-vtable-verify --enable-libmpx --enable-plugin 
> --enable-default-pie --with-system-zlib --with-target-system-zlib 
> --enable-objc-gc=auto --enable-multiarch --disable-werror 
> --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 
> --enable-multilib --with-tune=generic 
> --enable-offload-targets=nvptx-none --without-cuda-driver 
> --enable-checking=release --build=x86_64-linux-gnu 
> --host=x86_64-linux-gnu --target=x86_64-linux-gnu
> Thread model: posix
> gcc version 8.3.0 (Debian 8.3.0-6)
> 
> with Debian 10 x64
> 
> LL
> 
> 
> -----Původní zpráva-----
> Od: squid-users za uživatele Alex Rousskov
> Odesláno: út 12.9.2023 16:48
> Komu: squid-users at lists.squid-cache.org
> Předmět: Re: [squid-users] Squid BUG: assurance failed: 
> tok.skip(WellKnownUrlPathPrefix())
> 
> On 2023-09-12 10:21, Loučanský Lukáš wrote:
>  > today I was going to compile a new version of my beloved squid
>  > proxy (v6.3 or 6.3-20230903-ra9c06aa6a)
> 
> FWIW, "was going to compile" part does not make it clear (to me) whether
> you did actually compile/test v6.3.
> 
> 
>  > just to be welcomed by non
>  > working older configmgr.cgi and [debian package installed] squidclient
>  > (v4.6). After replacing squidclient with (compiled with squid) version
>  > 6.3 it's still not working, giving me accesss denied page.
>  >
>  > My cache.log contains these bug info lines:
>  >
>  > 023/09/12 16:07:03 kid3| ERROR: Squid BUG: assurance failed:
>  > tok.skip(WellKnownUrlPathPrefix())
>  >      exception location: cache_manager.cc(193) ParseUrl
> 
> 
> If the above output is from Squid v6.3, then you may have found a v6.3
> problem that we do not know about. Please share the HTTP request that
> triggers the above output.
> 
> Otherwise, please try to upgrade to Squid v6.3 because its commit
> 6695897 is meant to fix a v6.1 bug with the above symptoms.
> 
> 
> Thank you,
> 
> Alex.
> 
> 
>  >      current master transaction: master469155
>  > 2023/09/12 16:07:03 kid3| ERROR: Squid BUG: assurance failed:
>  > tok.skip(WellKnownUrlPathPrefix())
>  >      exception location: cache_manager.cc(193) ParseUrl
>  >      current master transaction: master469155
>  >
>  > In the file src/cache_manager.cc there is this
>  >
>  > const SBuf &
>  > CacheManager::WellKnownUrlPathPrefix()
>  > {
>  >      static const SBuf prefix("/squid-internal-mgr/");
>  >      return prefix;
>  > }
>  >
>  > and on the line 193 is this assure (after tok tokenizer)
>  >
>  >   Parser::Tokenizer tok(uri.path());
>  >
>  >      Assure(tok.skip(WellKnownUrlPathPrefix()));
>  >
>  > Is there something wrong with my config I should change after 6.2 to 6.3
>  > upgrade? I have some classic http_access manager allow ... and
>  > http_access manager deny lines. No definition what [acl] manager means.
>  >
>  > I have found some mentions here
>  > https://github.com/squid-cache/squid/blob/master/ChangeLog 
> <https://github.com/squid-cache/squid/blob/master/ChangeLog> and somewhere
>  > inside the commit / review git hub section for squid. But nothing says
>  > what to do make it work right. Besides this it seems squid as a proxy
>  > works fine...
>  >
>  > Thanks
>  >
>  > Lukas
>  >
>  >
>  >
>  > _______________________________________________
>  > squid-users mailing list
>  > squid-users at lists.squid-cache.org
>  > https://lists.squid-cache.org/listinfo/squid-users 
> <https://lists.squid-cache.org/listinfo/squid-users>
> 
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> 
> 
> 
> 
> 
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