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From www@netbsd.org Sun Jan 19 10:36:05 2025
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by mollari.NetBSD.org (Postfix) with ESMTPS id 30CA91A923A
for <gnats-bugs@gnats.NetBSD.org>; Sun, 19 Jan 2025 10:36:05 +0000 (UTC)
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Date: Sun, 19 Jan 2025 10:36:03 +0000 (UTC)
From: campbell+netbsd@mumble.net
Reply-To: campbell+netbsd@mumble.net
To: gnats-bugs@NetBSD.org
Subject: pbulk-build SIGSEGV on null pointer dereference
X-Send-Pr-Version: www-1.0
>Number: 59009
>Category: pkg
>Synopsis: pbulk-build SIGSEGV on null pointer dereference
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: joerg
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sun Jan 19 10:40:00 +0000 2025
>Last-Modified: Sun Jan 19 10:45:01 +0000 2025
>Originator: Taylor R Campbell
>Release: 2024Q4
>Organization:
The NetBulkbuilD Foundacrash
>Environment:
>Description:
Resolving...
Building...
Initialisation complete.
[1245/28443] Starting build of cwrappers-20220403
pbulk-build: Premature end of stream while reading path from socket
[1] Segmentation fault (core dumped) ${pbuild} -r ${loc}/pbuild -I ${pbuild_start_s...
$ gdb /pbulk/2024Q4/pkg/bin/pbulk-build ./pbulk-build.core
...
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000000001d60389c in send_build_info (arg=0x7b40d8c92270) at master.c:128
128 master.c: No such file or directory.
(gdb) info locals
peer = 0x7b40d8c92270
(gdb) print peer->job
$1 = (struct build_job *) 0x0
(gdb) print *peer
$2 = {peer_link = {le_next = 0x0, le_prev = 0x1d80f328 <inactive_peers>}, job = 0x0, fd = 9, tmp_buf = "\000\000\021h", buf = 0x0}
(gdb) print active_peers
$3 = {lh_first = 0x7b40d8c92270}
(gdb) print *active_peers->lh_first
$4 = {peer_link = {le_next = 0x0, le_prev = 0x1d80f328 <inactive_peers>}, job = 0x0, fd = 9, tmp_buf = "\000\000\021h", buf = 0x0}
(gdb) print inactive_peers
$5 = {lh_first = 0x7b40d8c92270}
(gdb) print active_peers.lh_first == inactive_peers.lh_first
$6 = 1
(gdb) print unassigned_peers
$7 = {lh_first = 0x0}
(gdb) print clients_started
$8 = 1
(gdb) print child_event
$9 = {sig_link = {le_next = 0x0, le_prev = 0x1d80f3c8 <all_signals>}, sig_id = 20, sig_received = 0, sig_handler = 0x1d603be1 <child_handler>}
(gdb) print child_pid
$10 = 278
master.c:
128 deferred_write(peer->fd, peer->job->begin, peer->job->end - peer->job->begin, peer, recv_status,
129 kill_peer);
It is curious that both active_peers and inactive_peers point to the same peer. This seems suboptimal.
Have a core dump and pbulk-build program with debug data, can print more info on request.
>How-To-Repeat:
run pbulk a lot
>Fix:
Yes, please!
>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: pkg-manager->joerg
Responsible-Changed-By: riastradh@NetBSD.org
Responsible-Changed-When: Sun, 19 Jan 2025 10:44:39 +0000
Responsible-Changed-Why:
Can you please take a look?
From: Taylor R Campbell <riastradh@NetBSD.org>
To: gnats-bugs@NetBSD.org, netbsd-bugs@NetBSD.org
Cc:
Subject: Re: pkg/59009: pbulk-build SIGSEGV on null pointer dereference
Date: Sun, 19 Jan 2025 10:44:02 +0000
I guess I should add a stack trace too:
(gdb) bt
#0 0x000000001d60389c in send_build_info (arg=3D0x7b40d8c92270) at master.=
c:128
#1 0x000000001d604b57 in deferred_write_handler (fd=3D<optimized out>, arg=
=3D0x7b40cdd0e060) at event.c:134
#2 0x000000001d604e77 in event_dispatch () at event.c:360
#3 0x000000001d603ef5 in master_mode (master_port=3D0x7f7fff84d052 "127.0.=
0.1:2002", start_script=3D0x7f7fff84d01c "/pbulk/2024Q4/pkg/libexec/pbulk/b=
uild-client-start") at master.c:322
#4 0x000000001d602327 in main (argc=3D3, argv=3D0x7f7fff84ca88) at pbuild.=
c:166
And this is the version of pbulk (unmodified from 2024Q4):
$ /pbulk/2024Q4/pkg/sbin/pkg_info -I pbulk-base pbulk
pbulk-base-0.57 Core components of the modular bulk build framework
pbulk-0.73 Modular bulk build framework
>Unformatted:
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