https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219689
Bug ID: 219689
Summary: [PATCH] systat segfault when invoked with some invalid
arguments
Product: Base System
Version: 11.0-RELEASE
Hardware: Any
OS: Any
Status: New
Keywords: patch
Severity: Affects Many People
Priority: ---
Component: bin
Assignee: freebsd-bugs@FreeBSD.org
Reporter: m...@markoturk.info
Keywords: patch
Created attachment 183110
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=183110&action=edit
patch
Hi,
some combinations of invalid arguments can crash systat.
For example:
systat -vmstat -d
Segmentation fault (core dumped)
I've attached a patch that fixes this.
(gdb) bt
#0 strlen (str=0x0) at /usr/src/lib/libc/string/strlen.c:100
#1 0x0000000801170092 in strdup (str=0x0) at
/usr/src/lib/libc/string/strdup.c:46
#2 0x0000000000403c12 in dsselect (args=0x0, select_mode=DS_SELECT_ADDONLY,
maxshowdevs=7, s1=0x621e00) at /usr/src/usr.bin/systat/devs.c:267
#3 0x000000000040ff4e in cmdkre (cmd=<value optimized out>, args=0x0) at
_ctype.h:107
#4 0x0000000000405955 in main (argc=<value optimized out>, argv=<value
optimized out>) at /usr/src/usr.bin/systat/main.c:225
#5 0x0000000000402f1f in _start ()
#6 0x000000080063a000 in ?? ()
#7 0x0000000000000000 in ?? ()
/Marko
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