Freetz-NG
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Hallo, Wie kann man das Problem lösen? |
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Replies: 21 comments 51 replies
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Versuchs mal so: |
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In diesem Thread schreibt ein Benutzer, dass Transmission 4.0.6 mit freetz-ng funktioniert. Allerdings ist es eine MIPS Box und ich verwende eine 7520 mit ARM CPU. Strace zeigt mit -fffff nicht mehr an. Ist es nicht merkwürdig, dass ld-uClibc.so.1 bei ldd an erster und letzter Stelle steht. Scheinbar wird dort der Interpreter geladen, weil am Ende eine Speicheradresse angegeben ist. In den einschlägigen Seiten habe ich keinen Hinweis auf ein solches Problem gefunden. |
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Keine Ahnung! |
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Vielleicht weil versucht wird, den Interpreter an erster Stelle als dynamische Library zu laden. Mit gdb ohne Symbole: |
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Ich hab noch nie gdb benutzt. |
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Transmission 4 lief auf der Box noch nicht. Ich wollte nun mal eine neue AVM/freetz-ng Firmware verwenden. Aufgrund der Rückmeldung, dass Transmission 4 auf einer MIPS Box läuft, wollte ich das nun ausprobieren. Leider ohne Erfolg. Solange Transmission 3 noch funktioniert, kann ich diese Version weiter nutzen. |
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Am einfachsten wäre wenn du auch eine mips Box nutzt?! |
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Das habe ich überlegt und wieder verworfen. Ich habe keine Lust auf eine 7590 mit defektem 2,4 GHz Wlan. Das scheint eine Krankheit ab einem gewissen Alter zu sein. |
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Dann versuch was anderes, zb die Sache mit der beta |
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Mit MIPS Box startet tranmission 4.0.6 |
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I guess it is still related to Curl https://github.com/orgs/Freetz-NG/discussions/1047 |
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The problem which I reported here ist related to the ARM CPU of Fritzbox 7520/7530. Transmission 4.0.6 crashes immediatly after the startup with segmentation fault. Possibly it is related to the tool chain or some missing options. I tested Transmission on Fritzbox 7590 afterwards because I read in the other thread that Transmission is running on Fritzboxes with MIPS CPU. It seams to run well on this box. I am using MBEDTLS instead of OPENSSL. This option can be configured in the libraries/Webdav section of freetz-ng menuconfig. Possibly it can solve your problem with curl. |
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Does curl 8.14.0 work 97ad4b7 ? |
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I tested Transmission 4.0.6 with curl 8.12.1 e71e74e . |
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I don't know since I did not have the time to try 8.14. |
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Thx! |
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Transmission 4.0.6 isn't build anymore because CMAKE was bumped to version 4.0.2. Some parts of Transmission 4.0.6 (dht, libnatpmp) require a compatibility with CMAKE < 3.5 which was revoved. Error message: Patch for Transmission 4.0.6: |
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Andere Packages wollten nicht wenn eine zu alte cmake version bei zb einem uralten Ubuntu installiert ist... Upstream gab es unter anderem diese Änderung transmission/transmission@67762b9 |
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I tested Transmission 4.0.6 with libcurl 8.14.0, OPENSSL and MBEDTLS (4fe5d56). I can download torrents independent of the utilized SSL library. |
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using which box? 7590 ? |
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@donacarr why you want to know it without time? |
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What do you mean? I don't understand sorry |
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With 7590. |
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Transmission 3.0 works with OPENSSL v1.1.1 or MBEDTLS but not with OPENSSL 3.0 Either OPENSSL v1.1.1 or MBEDTLS can be selected by default if Transmission is selected. MBEDTLS might be prefered because OPENSSL v1.1.1 is deprecated. Transmission 3.0 is still needed due to 2 reasons:
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Thx! Maybe we shold put this on the package help page! But all mbedtls versions of freetz are also deprecated:
so so need to bump it... https://github.com/Mbed-TLS/mbedtls/releases |
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falls jemand die beta ausprobieren möchte: beta.patch |
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on my box 4690 (ARM based) the transmission 3.0.0 crashes as soon as the download of a torrent starts. Any idea how to troubleshoot the issue? Thank you in advance. |
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You should change the OPENSSL version to v1.1.1 or use MBEDTLS for Transmission 3.0. You may also try transmission 4.0.6. The segmentation fault problem occured with an older ARM CPU than yours. |
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Thx! What about Openssl 3.5 and Transmission 4? |
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Warning added: 8dfc497 |
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Dont know (even what transmission does, i never used it!), but the current stable is 4.0.6 |
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hi @AkteX I did more tests and below you find the results with my box 4690 (ARM based): transmission 4.0.6 does not work with any OpenSSL version I tried to build 4.0.6 with mbed TLS 3.6 (since the 2.28 is DEPRECATED and build fails suggesting to use at least 3.2.0) Do you know how fix the build when using mbed TLS 3.6 ? |
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@AkteX Please ignore !!! |
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Build runs through with SSL 1.1.1 - tested for 7520/7530
Build runs through with any SSL version 1.1.1, 3.0, 3.5 - tested for 7520/7530
Build stops using transmission 3.0.0 or transmission 4.0.6 and mbedTLS 2.2.8 with the suggestion to use at least 3.2.0
mbedTLS 3.6 is only for developers! @fda77 Curl package 8.16.0 is selected by default and requires at least mbedTLS 3.2.0. |
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Thanks for the info, atm mbedtls needs to be disabled for curl, until freetz has the newer (working) version |
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mbedtls 3 can now be tested (i have not) |
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Build runs trough if I select nzbget with the option "With SSL/TLS encryption support". I used mbedtls because only with this library I was able to build nzbget and transmission 3.0 for 7520. Now I can't build transmission 3.0 with mbedtls 3.6. Transmission 4.0.6 can't be build neither with any ssl library nor with mbedtls 3.6. Transmission 3.0 with mbedtls 3.6: Transmission 4.0.6 with mbedtls 3.6: It seams that it can't continue the build at this point. Transmission 4.0.6 with libssl 3.5: It seams that it can't continue the build at this point. Currently it is not possible to build transmission 4.0.6 for 7520/7530. @Ircama, do you have an idea why cmake can't build Transmission 4.0.6 successfully for boxes with ARM CPU? |
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You should use all the shared libraries. Install #!/bin/sh
# Script to test each library individually on Fritz!Box
echo "=== TRANSMISSION-DAEMON LIBRARY TEST ==="
echo "Testing each library with LD_PRELOAD to identify which causes segfault"
echo ""
# List of libraries required by transmission-daemon (space-separated)
LIBS="libevent-2.1.so.7 libdeflate.so.0 libssl.so.3 libcrypto.so.3 libcurl.so.4 libpsl.so.5 libstdc++.so.6 libgcc_s.so.1 libc.so.0 libatomic.so.1"
# Indirect dependencies (loaded indirectly)
INDIRECT_LIBS="ld-uClibc.so.1"
LIB_PATH="/usr/lib/freetz"
echo "--- Test 1: Check library existence ---"
for lib in $LIBS $INDIRECT_LIBS; do
if [ -f "$LIB_PATH/$lib" ]; then
SIZE=$(ls -lh "$LIB_PATH/$lib" | awk '{print $5}')
echo "✓ $lib ($SIZE)"
else
echo "✗ $lib - MISSING!"
fi
done
echo ""
echo "--- Test 2: Test /bin/true (baseline) ---"
/bin/true
if [ $? -eq 0 ]; then
echo "✓ /bin/true works normally"
else
echo "✗ /bin/true fails - system compromised!"
fi
echo ""
echo "--- Test 3: Test LD_PRELOAD for each library ---"
for lib in $LIBS; do
if [ -f "$LIB_PATH/$lib" ]; then
printf "Testing $lib ... "
# Test without timeout first (BusyBox timeout syntax varies)
LD_PRELOAD=$LIB_PATH/$lib /bin/true >/dev/null 2>&1
EXIT_CODE=$?
case $EXIT_CODE in
0)
echo "✓ OK"
;;
139)
echo "✗ SEGFAULT (exit code 139) *** PROBLEM HERE ***"
;;
*)
echo "✗ FAIL (exit code $EXIT_CODE)"
;;
esac
fi
done
echo ""
echo "--- Test 4: Test critical combinations ---"
printf "Test OpenSSL (libssl + libcrypto) ... "
LD_PRELOAD=$LIB_PATH/libssl.so.3:$LIB_PATH/libcrypto.so.3 /bin/true >/dev/null 2>&1
[ $? -eq 0 ] && echo "✓ OK" || echo "✗ FAIL (exit $?)"
printf "Test OpenSSL + libatomic ... "
LD_PRELOAD=$LIB_PATH/libssl.so.3:$LIB_PATH/libcrypto.so.3:$LIB_PATH/libatomic.so.1 /bin/true >/dev/null 2>&1
[ $? -eq 0 ] && echo "✓ OK" || echo "✗ FAIL (exit $?)"
printf "Test all libraries together ... "
ALL_LIBS=""
for lib in $LIBS; do
if [ -f "$LIB_PATH/$lib" ]; then
ALL_LIBS="$ALL_LIBS:$LIB_PATH/$lib"
fi
done
ALL_LIBS="${ALL_LIBS#:}"
LD_PRELOAD=$ALL_LIBS /bin/true >/dev/null 2>&1
[ $? -eq 0 ] && echo "✓ OK" || echo "✗ FAIL (exit $?)"
echo ""
echo "--- Test 5: Test transmission-daemon directly ---"
printf "Test transmission-daemon --version ... "
/usr/bin/transmission-daemon --version >/dev/null 2>&1
EXIT_CODE=$?
case $EXIT_CODE in
0)
echo "✓ OK - IT WORKS!"
;;
139)
echo "✗ SEGFAULT (exit code 139)"
;;
*)
echo "✗ FAIL (exit code $EXIT_CODE)"
;;
esac
echo ""
echo "--- Test 6: Test with strace (first lines) ---"
echo "Last lines before crash:"
strace -e trace=all /usr/bin/transmission-daemon 2>&1 | tail -20
echo ""
echo "=== END TEST ==="
echo ""
echo "RESULTS INTERPRETATION:"
echo "- Exit code 0 = success, 139 = segfault"
echo "- If a library causes SEGFAULT (exit 139), that's the problematic library"
echo "- If libatomic.so.1 gives SEGFAULT, the problem is in libatomic"
echo "- If libssl.so.3 or libcrypto.so.3 give SEGFAULT, the problem is in OpenSSL 3.x"
echo ""
echo "NOTE: All libraries shown above are used by transmission-daemon."
echo "If Transmission 3.0 works but Transmission 4.0.6 doesn't, and both use the"
echo "same libraries, then the issue is likely in how Transmission 4.0.6 uses those"
echo "libraries (especially OpenSSL 3.x API) rather than the libraries themselves."
echo ""
echo "However, if libssl.so.3 or libcrypto.so.3 fail in LD_PRELOAD test above,"
echo "it confirms OpenSSL 3.x is incompatible with this ARM CPU + uClibc combination."This is the output on my device: |
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This is the output of my 7420: |
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Mmmm.... it should not be a libssl issue, not a library issue: it is an immediate crash after just 3 syscalls while the dynamic linker is initializing; si_addr=0x3c. The TLS segment (10KB) might trigger a bug in the old ARM uClibc dynamic linker. I'm thinking about a workaround using emulated TLS: please try adding the following after line 82 in $(PKG)_EXTRA_CFLAGS += -femulated-tls -fno-threadsafe-staticsExample: # add EXTRA_(C|LD)FLAGS
$(PKG)_CONFIGURE_PRE_CMDS += $(call PKG_ADD_EXTRA_FLAGS,(C|LD)FLAGS)
$(PKG)_EXTRA_CFLAGS += -ffunction-sections -fdata-sections
$(PKG)_EXTRA_CFLAGS += -femulated-tls -fno-threadsafe-statics
$(PKG)_EXTRA_LDFLAGS += -Wl,--gc-sectionsThen recompile with: make transmission-dirclean
make transmission-precompiledThen test the executable with: transmission-daemon --versionOther interesting tests: readelf -a transmission-daemon
strace transmission-daemon --version
LD_DEBUG=all transmission-daemon --version |
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Build fails with the following output: I changed the options to |
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This is not valid (and Try this again please: Example: Then recompile with: Then test the executable with: |
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The result is unchanged. |
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The Segmentation Fault also occurs with Transmission 4.0.6 on Fritzbox 6591. I can't get running both Nzbget and Transmission on this device. Transmission 3.0 needs OpenSSL 1.1.1 but Nzbget needs OpenSSL 3.0 or 3.5. Only Fritzbox 7590 is able to run Transmission 4.0.6. |
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Please try to create a core dump and check it with gdb. You need to use an ext4 filesystem to get a non-null core. Also, try to run or Maybe there is an issue limilar to this one 2a01452. As soon as I have time I will publish a new version of gdb 17.1 and rtorrent/rutorrent (together with mediainfo). |
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Try also to comment in https://github.com/Freetz-NG/freetz-ng/blob/master/make/pkgs/transmission/transmission.mk#L132 and rebuild the package. |
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After deactivation of readelf 7520 file 7520 Try to create core dump: It seams that a directory isn't specified where the system shall store core dump files. |
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Can you show |
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file 6591 |
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@AkteX, the crash occurs during dynamic linking, before the transmission code even gets to execute. From gdb, only ld-uClibc is mapped in memory and none of the dependent libraries (libevent, libssl, libcrypto, etc.) have been loaded. The crash occurs inside the loader itself. This is a core toolchain issue. I do not have experience on it. From some search I did, try the following commands: Also this |
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@AkteX Please ignore !!!
https://github.com/Freetz-NG/freetz-ng/blob/master/make/libs/mbedtls/Config.in#L40