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Bug 1411083 - merge upstream seccomp whilelisted syscalls
Summary: merge upstream seccomp whilelisted syscalls
Alias: None
Product: Fedora
Classification: Fedora
Component: tracker
Version: 24
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Igor Gnatenko
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2017-01-08 09:59 UTC by Fabrice Bellet
Modified: 2017-08-08 19:33 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2017-08-08 19:33:14 UTC
Type: Bug

Attachments (Terms of Use)

Description Fabrice Bellet 2017-01-08 09:59:27 UTC

I noticed a systematic segfault of tracker-extract on my fedora 24 box, while working on a djvu file. I found that this crash is related to the newly added seccomp sandboxing feature.

Would it make sense to merge some upstream patches that whitelist supplementary syscall. Taken from master, I identified these patches :

47b4958 libtracker-common: Allow querying process stats/limits
c9acfe0 libtracker-common: Handle mlock*/munlock* syscalls
73f5cd5 libtracker-common: Whitelist umask
435eca3 libtracker-common: Whitelist dup/dup2/dup3
88cfdc5 libtracker-common: Whitelist gettimeofday() syscall
2860120 libtracker-common: Whitelist clock_gettime/getres
fff1ba0 libtracker-common: Whitelist more syscalls used on non-x86_64 arches
14f77ae libtracker-common: Whitelist *64() stat/getdents syscalls

F24 (version 1.8.3) can add the first 5 patches
F25 (version 1.10.3) can add the first 5 patches too
devel (version 1.11.2) can add the 8 patches

For information, the crash on djvu files comes from the missing getrusage syscall:

#0  0x00007ffff1a07777 in getrusage () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffc065be30 in _rnd_get_event (e=e@entry=0x7fffd55d70b0) at rnd-common.c:68
#2  0x00007fffc065c3fa in wrap_nettle_rnd_init (ctx=<optimized out>) at rnd.c:230
#3  0x00007fffc05bdcc9 in _gnutls_rnd_init () at random.c:49
#4  0x00007fffc05b17ce in gnutls_global_init () at gnutls_global.c:296
#5  0x00007fffc0592a3c in lib_init () at gnutls_global.c:483
#6  0x00007ffff7de8daa in call_init (l=<optimized out>, argc=argc@entry=3, argv=argv@entry=0x7fffffffde08, env=env@entry=0x55555579d200) at dl-init.c:72
#7  0x00007ffff7de8ebb in call_init (env=0x55555579d200, argv=0x7fffffffde08, argc=3, l=<optimized out>) at dl-init.c:30
#8  _dl_init (main_map=main_map@entry=0x7fffc801e0e0, argc=3, argv=0x7fffffffde08, env=0x55555579d200) at dl-init.c:120
#9  0x00007ffff7dedab1 in dl_open_worker (a=a@entry=0x7fffd55d7640) at dl-open.c:564
#10 0x00007ffff7de8c54 in _dl_catch_error (objname=objname@entry=0x7fffd55d7630, errstring=errstring@entry=0x7fffd55d7638, mallocedp=mallocedp@entry=0x7fffd55d762f, operate=operate@entry=0x7ffff7ded660 <dl_open_worker>, args=args@entry=0x7fffd55d7640) at dl-error.c:187
#11 0x00007ffff7ded009 in _dl_open (file=0x7fffc806c3d0 "/usr/lib64/gstreamer-1.0/libgstlibav.so", mode=-2147483646, caller_dlopen=0x7ffff2f14801 <g_module_open+705>, nsid=-2, argc=<optimized out>, argv=<optimized out>, env=0x55555579d200) at dl-open.c:649
#12 0x00007ffff06f9f09 in dlopen_doit (a=a@entry=0x7fffd55d7870) at dlopen.c:66
#13 0x00007ffff7de8c54 in _dl_catch_error (objname=0x7fffc8002e10, errstring=0x7fffc8002e18, mallocedp=0x7fffc8002e08, operate=0x7ffff06f9eb0 <dlopen_doit>, args=0x7fffd55d7870) at dl-error.c:187
#14 0x00007ffff06fa591 in _dlerror_run (operate=operate@entry=0x7ffff06f9eb0 <dlopen_doit>, args=args@entry=0x7fffd55d7870) at dlerror.c:163
#15 0x00007ffff06f9fa2 in __dlopen (file=file@entry=0x7fffc806c3d0 "/usr/lib64/gstreamer-1.0/libgstlibav.so", mode=<optimized out>) at dlopen.c:87
#16 0x00007ffff2f14801 in _g_module_open (bind_local=<optimized out>, bind_lazy=0, file_name=<optimized out>) at gmodule-dl.c:97
#17 g_module_open (file_name=file_name@entry=0x7fffc40c67a0 "/usr/lib64/gstreamer-1.0/libgstlibav.so", flags=<optimized out>) at gmodule.c:573
#18 0x00007fffd6ccd5cd in _priv_gst_plugin_load_file_for_registry (filename=0x7fffc40c67a0 "/usr/lib64/gstreamer-1.0/libgstlibav.so", registry=0x5555558d3f50, registry@entry=0x0, error=error@entry=0x7fffd55d7ad0) at gstplugin.c:745
#19 0x00007fffd6ccdfca in gst_plugin_load_file (filename=<optimized out>, error=error@entry=0x7fffd55d7ad0) at gstplugin.c:680
#20 0x00007fffd6cce40a in gst_plugin_load_by_name (name=0x7fffc40c3ea0 "libav") at gstplugin.c:1265
#21 0x00007fffd6cced8e in gst_plugin_feature_load (feature=feature@entry=0x7fffc414ab00) at gstpluginfeature.c:111
#22 0x00007fffd6cf4b13 in gst_type_find_factory_call_function (factory=0x7fffc414ab00, find=0x7fffd55d7bb0) at gsttypefindfactory.c:210
#23 0x00007fffd6a334b1 in gst_type_find_helper_get_range (obj=obj@entry=0x7fffc421a3b0, parent=<optimized out>, func=<optimized out>, size=<optimized out>, extension=extension@entry=0x7fffc80010c0 "djvu", prob=prob@entry=0x7fffd55d7c44) at gsttypefindhelper.c:355
#24 0x00007fffd5615ac0 in gst_type_find_element_loop (pad=0x7fffc4212720) at gsttypefindelement.c:1132
#25 0x00007fffd6cf0181 in gst_task_func (task=0x7fffc4220050) at gsttask.c:332
#26 0x00007ffff25d06ee in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#27 0x00007ffff25cfcf5 in g_thread_proxy (data=0x7fffc420ff70) at gthread.c:780
#28 0x00007ffff1cd85ca in start_thread (arg=0x7fffd55d8700) at pthread_create.c:333
#29 0x00007ffff1a120ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Comment 1 Fedora End Of Life 2017-07-26 00:10:18 UTC
This message is a reminder that Fedora 24 is nearing its end of life.
Approximately 2 (two) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 24. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
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Comment 2 Fedora End Of Life 2017-08-08 19:33:14 UTC
Fedora 24 changed to end-of-life (EOL) status on 2017-08-08. Fedora 24 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

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