Your message dated Mon, 31 Jan 2022 18:37:09 +0100
with message-id <[email protected]>
and subject line Re: Bug#1004674: libnss-systemd: SIGABRT on getgrent pass 2 (
with dynamic user)
has caused the Debian Bug report #1004674,
regarding libnss-systemd: SIGABRT on getgrent pass 2 ( with dynamic user)
to be marked as done.
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--
1004674: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1004674
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: libnss-systemd
Version: 247.3-6
Severity: normal
X-Debbugs-Cc: [email protected]
Dear maintainer,
I discovered this issue when running "metastore -s":
Assertion 'name' failed at src/basic/strv.c:22, function strv_find(). Aborting.
The source in metastore is this block of code (src/utils.c:) :
/* Initial setup of the gid table */
static void
create_group_table()
{
struct group *tmp;
int count, index;
for (count = 0; getgrent(); count++) /* Do nothing */;
gtable = xmalloc(sizeof(struct group) * (count + 1));
memset(gtable, 0, sizeof(struct group) * (count + 1));
setgrent();
for (index = 0; (tmp = getgrent()) && index < count; index++) { //
<--- SIGABRT on getgrent()
gtable[index].gr_gid = tmp->gr_gid;
gtable[index].gr_name = xstrdup(tmp->gr_name);
}
endgrent();
}
I have a dynamic user:
getent passwd
#other users
earlyoom:x:61876:61876:Dynamic User:/:/usr/sbin/nologin
#EOF
The first pass through the group table with getgrent goes fine (and earlyoom's
group shows up no problem).
The second pass, it bugs out at the last group entry (which is also
earlyoom's). The issue disappears after
# systemctl stop earlyoom
(and the earlyoom passwd entry goes away, as expected).
- The following reproduces the problem (as the body of create_group_table):
for (count = 0; getgrent(); count++) /* Do nothing */;
setgrent();
for (count = 0; getgrent(); count++) /* Do nothing */;
(ABRT on last line).
I don't know if this reproduces on other non-Debian systems. The only related
upstream bug I could find
is [1] which is resolved by [2], and is apparently included as of 247.3-6 (by
inspection of source).
Best,
Antonio
[1] https://github.com/systemd/systemd/issues/17870
[2] https://github.com/systemd/systemd/pull/17873
-- System Information:
Debian Release: 11.2
APT prefers stable-updates
APT policy: (990, 'stable-updates'), (990, 'stable-security'), (990,
'stable'), (600, 'proposed-updates')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.4.0-172-amd64 (SMP w/16 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not
set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages libnss-systemd depends on:
ii libc6 2.31-13+deb11u2
ii systemd 247.3-6
libnss-systemd recommends no packages.
libnss-systemd suggests no packages.
--- End Message ---
--- Begin Message ---
Version: 250.3-2
Am 31.01.22 um 17:26 schrieb Michael Biebl:
Control: tags -1 + moreinfo
Am 31.01.22 um 16:31 schrieb Antonio Russo:
I discovered this issue when running "metastore -s":
Assertion 'name' failed at src/basic/strv.c:22, function strv_find().
Aborting.
..
I don't know if this reproduces on other non-Debian systems. The only
related upstream bug I could find
is [1] which is resolved by [2], and is apparently included as of
247.3-6 (by inspection of source).
Since we don't ship any Debian specific modifications in that regard, it
would be great if you can try with systemd v250 from unstable/testing
and if it's still reproducible there, report the issue at
https://github.com/systemd/systemd/issues
I could easily reproduce the issue by install earlyoom and metastore in
bullseye VM.
After only upgrading systemd/libnss-systemd to 250.3-2, the issue was
gone. Marking as fixed for that version.
Given that, there is no need to forward this to upstream.
Michael
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--- End Message ---
