Your message dated Thu, 05 Jan 2023 13:19:14 +0000
with message-id <[email protected]>
and subject line Bug#1024635: fixed in dash 0.5.12-1
has caused the Debian Bug report #1024635,
regarding dash: segfaults during runtime when executing a script with invalid
syntax
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1024635: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1024635
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: dash
Version: 0.5.11+git20210903+057cd650a4ed-9
Severity: normal
Tags: upstream
Control: forwarded -1
https://lore.kernel.org/dash/[email protected]/
Hey.
I've already forwarded this upstream, but there doesn't seem to be any
bug tracker, so report it here in addition, to keep some records until
it is fixed.
Cheers,
Chris.
I found the following issue by chance, when converting a shell
script[0] from bash to POSIX sh (well that + the use of "local"):
Below is a strongly reduced version of [0] which still causes the
error:
-------------------------------------------------------------------
#!/bin/sh
reject_and_die()
{
exit 1
}
reject_filtered_cmd()
{
reject_and_die "disallowed command${restrict_path_list:+ (restrict-path:
\"${restrict_path_list//|/\", \"}\")}"
}
reject_filtered_cmd
-------------------------------------------------------------------
As you can see, I missed one bashism, namely the
${parameter//pattern/string} form of parameter expansion.
Now executing this with dash:
$ dpkg -l dash | grep ^ii
ii dash 0.5.11+git20210903+057cd650a4ed-9 amd64
POSIX-compliant shell
$ dash ssh_filter_btrbk.sh
Segmentation fault
$
With kernel log:
Nov 21 03:31:37 heisenberg kernel: dash[145217]: segfault at 1 ip
000055fa32ef8cd4 sp 00007ffd79a75140 error 4 in dash[55fa32ef3000+13000]
Nov 21 03:31:37 heisenberg kernel: Code: e2 01 4c 8d 34 42 48 8d 05 61 d9 00 00
49 01 c6 89 f0 83 e0 02 89 85 fc fe ff ff 74 17 c7 85 fc fe ff ff 00 00 00 00
83 e3 fd <41> 80 3f 7e 0f 84 c2 05 00 00 48 8b 35 8b 58 01 00 48 8b 05 5c 53
Shouldn't that rather give some parsing error?
One some other system (where I cannot really test any further since I
have no root) it even may have caused some more:
[10527194.157467] ssh_filter_btrb[816610]: segfault at 0 ip 000055c8ac34a698 sp
00007ffd4a997080 error 4 in dash[55c8ac344000+13000]
[10527194.157482] Code: 85 c4 01 00 00 48 83 c4 68 4c 89 f8 5b 5d 41 5c 41 5d
41 5e 41 5f c3 0f 1f 00 48 83 c2 02 eb a2 66 90 4c 89 fa 4d 85 f6 78 98 <48> 8b
36 bf 01 00 00 00 eb 8e 66 0f 1f 44 00 00 0f b6 42 01 48 83
[10527195.790531] traps: pool-tracker-st[816482] trap int3 ip:7f94e8271295
sp:7f94deffc770 error:0 in libglib-2.0.so.0.6400.6[7f94e8235000+84000]
Not sure whether that traps is in anyway related or just some
coincidence.
Thanks,
Chris.
[0] https://github.com/digint/btrbk/blob/master/ssh_filter_btrbk.sh
--- End Message ---
--- Begin Message ---
Source: dash
Source-Version: 0.5.12-1
Done: Andrej Shadura <[email protected]>
We believe that the bug you reported is fixed in the latest version of
dash, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Andrej Shadura <[email protected]> (supplier of updated dash package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Format: 1.8
Date: Thu, 05 Jan 2023 14:06:02 +0100
Source: dash
Architecture: source
Version: 0.5.12-1
Distribution: unstable
Urgency: medium
Maintainer: Andrej Shadura <[email protected]>
Changed-By: Andrej Shadura <[email protected]>
Closes: 558607 819829 850202 975326 1017531 1024635
Changes:
dash (0.5.12-1) unstable; urgency=medium
.
* New upstream release (Closes: #1017531, #1024635).
* Refresh patches.
* Apply upstream patches for hash, ulimit and manpages
(Closes: #558607, #819829, #850202, #975326).
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