From: Johannes Altmanninger <aclopte@gmail.com>
To: dash@vger.kernel.org
Subject: Crash in expandarg
Date: Sat, 14 Sep 2024 00:05:48 +0200 [thread overview]
Message-ID: <ZuS3PI7He-T7pugf@gmail.com> (raw)
I'm hitting an easily reproducible crash.
It bisects to c5bf970 (expand: Add multi-byte support to pmatch, 2024-06-02).
After bisecting I reduced it to this example (probably not minimal)
echo \\ | dash -c 'foo=$(cat; printf .); foo=${foo%.}'
stacktrace from gdb:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000061d927e57bbd in expandarg (arg=arg@entry=0x61d927e6dce00000, arglist=arglist@entry=0x7fff2ea3bbe0, flag=flag@entry=4) at expand.c:228
228 argbackq = arg->narg.backquote;
(gdb) bt
#0 0x000061d927e57bbd in expandarg (arg=arg@entry=0x61d927e6dce00000, arglist=arglist@entry=0x7fff2ea3bbe0, flag=flag@entry=4) at expand.c:228
#1 0x000061d927e53168 in evalcommand (cmd=0x61d927e6dd10 <stackbase+400>, flags=1) at eval.c:865
#2 0x000061d927e522e7 in evaltree (n=0x61d927e6dd10 <stackbase+400>, flags=1) at eval.c:305
#3 0x000061d927e522e7 in evaltree (n=0x61d927e6dd10 <stackbase+400>, n@entry=0x61d927e6dd30 <stackbase+432>, flags=1) at eval.c:305
#4 0x000061d927e52cf3 in evalstring (s=0x61d927e6db88 <stackbase+8> "foo=$(cat; printf .); foo=${foo%.}", flags=1) at eval.c:190
#5 0x000061d927e506f5 in main (argc=3, argv=0x7fff2ea3bec8) at main.c:176
next reply other threads:[~2024-09-13 22:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-13 22:05 Johannes Altmanninger [this message]
2024-11-17 2:25 ` [PATCH] expand: Fix scanleft/right for !FNMATCH_IS_ENABLED && quotes Herbert Xu
2024-11-17 6:55 ` Johannes Altmanninger
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZuS3PI7He-T7pugf@gmail.com \
--to=aclopte@gmail.com \
--cc=dash@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox