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[tor-bugs] #30658 [Core Tor/Torsocks]: Unsupported syscalls (292/dup3, 293/pipe2, 332/statx)
#30658: Unsupported syscalls (292/dup3, 293/pipe2, 332/statx)
------------------------+-----------------------------------
Reporter: eirizuhaex | Owner: dgoulet
Type: defect | Status: new
Priority: Medium | Component: Core Tor/Torsocks
Version: | Severity: Normal
Keywords: | Actual Points:
Parent ID: | Points:
Reviewer: | Sponsor:
------------------------+-----------------------------------
I've been playing around with an torified environment via `. torsocks on`.
Running a vanilla vim, torsocks complains about the mentioned syscalls:
{{{#!sh
$ vim -u NONE
1559028872 WARNING torsocks[6802]: [syscall] Unsupported syscall number
293. Denying the call (in tsocks_syscall() at syscall.c:568)
1559028872 WARNING torsocks[6802]: [syscall] Unsupported syscall number
332. Denying the call (in tsocks_syscall() at syscall.c:568)
1559028873 WARNING torsocks[6802]: [syscall] Unsupported syscall number
292. Denying the call (in tsocks_syscall() at syscall.c:568)
}}}
Peeking in the linux kernel source tree, these naively look safe to me:
{{{#!sh
$ egrep '^(293|332|292)' arch/x86/entry/syscalls/syscall_64.tbl
292 common dup3 __x64_sys_dup3
293 common pipe2 __x64_sys_pipe2
332 common statx __x64_sys_statx
}}}
Does adding these to the whitelist seem reasonable?
=== Version Info
{{{#!sh
$ torsocks --version
Torsocks 2.3.0
$ lsb_release --all
LSB Version: 1.0
Distributor ID: VoidLinux
Description: Void Linux
Release: rolling
Codename: void
$ uname -a
Linux lang 5.0.17_1 #1 SMP PREEMPT Fri May 17 08:23:10 UTC 2019 x86_64
GNU/Linux
}}}
=== Notes
This is my first ticket here, so if I've commited some ''faux pas'' please
forgive me. Cheers!
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30658>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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