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Re: [tor-bugs] #29819 [Core Tor/Tor]: Seccomp: sandbox crash on rt_sigaction with libseccomp 0.2.4
#29819: Seccomp: sandbox crash on rt_sigaction with libseccomp 0.2.4
-----------------------------------+------------------------------------
Reporter: toralf | Owner: nickm
Type: defect | Status: assigned
Priority: Medium | Milestone: Tor: 0.4.0.x-final
Component: Core Tor/Tor | Version: Tor: unspecified
Severity: Normal | Resolution:
Keywords: crash, linux, sandbox | Actual Points:
Parent ID: | Points: 0.2
Reviewer: | Sponsor:
-----------------------------------+------------------------------------
Comment (by toralf):
I applied the 2.4.0..2.4.1 diff here at a stable Gentoo hardened and got
not
{{{
t44 /etc/portage/patches/sys-libs/libseccomp-2.4.0 # tail -f
/tmp/notice.log
Apr 18 16:40:34.000 [notice] Bootstrapped 20% (onehop_create):
Establishing an encrypted directory connection
Apr 18 16:40:34.000 [notice] Bootstrapped 25% (requesting_status): Asking
for networkstatus consensus
Apr 18 16:40:34.000 [notice] Bootstrapped 30% (loading_status): Loading
networkstatus consensus
Apr 18 16:40:34.000 [notice] I learned some more directory information,
but not enough to build a circuit: We have no usable consensus.
Apr 18 16:40:34.000 [notice] Bootstrapped 40% (loading_keys): Loading
authority key certs
Apr 18 16:40:34.000 [warn] Could not open "/var/lib/tor/data/unverified-
microdesc-consensus" for mmap(): Permission denied
Apr 18 16:40:34.000 [notice] I learned some more directory information,
but not enough to build a circuit: We have no usable consensus.
Apr 18 16:40:44.000 [notice] Application request when we haven't used
client functionality lately. Optimistically trying directory fetches
again.
Apr 18 16:40:47.000 [notice] Application request when we haven't used
client functionality lately. Optimistically trying directory fetches
again.
Apr 18 16:40:47.000 [notice] Application request when we haven't used
client functionality lately. Optimistically trying directory fetches
again.
}}}
The perms are:
{{{
t44 /etc/portage/patches/sys-libs/libseccomp-2.4.0 # ls -l
/var/lib/tor/data/
total 12108
-rw------- 1 tor tor 20442 Apr 18 16:40 cached-certs
-rw------- 1 tor tor 2110905 Apr 18 16:16 cached-microdesc-consensus
-rw------- 1 tor tor 5965233 Apr 11 18:20 cached-microdescs
-rw------- 1 tor tor 2163133 Apr 18 16:17 cached-microdescs.new
-rw------- 1 tor tor 32 Apr 18 16:40 control_auth_cookie
drwx------ 1 tor tor 224 Aug 18 2017 keys
-rw------- 1 tor tor 0 Apr 18 16:40 lock
-rw------- 1 tor tor 12212 Apr 18 16:40 state
-rw------- 1 tor tor 2111522 Apr 18 16:40 unverified-microdesc-consensus
}}}
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29819#comment:20>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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