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While trying to figure a reproducer to rhbz#1403971
I managed to get /usr/bin/more to crash on another
condition. For example:
(gdb) bt
#0 __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:31
#1 0x00007ffff78c8d0f in __regcomp (preg=preg@entry=0x7fffffffde30, pattern=0x0, cflags=cflags@entry=8)
at regcomp.c:499
#2 0x0000000000405813 in search (buf=<optimized out>, file=file@entry=0x60ee00, n=n@entry=1)
at text-utils/more.c:1591
#3 0x0000000000405d6a in command (filename=filename@entry=0x0, f=f@entry=0x60ee00) at text-utils/more.c:1344
#4 0x0000000000406664 in screen (f=f@entry=0x60ee00, num_lines=<optimized out>, num_lines@entry=32)
at text-utils/more.c:708
#5 0x0000000000402365 in main (argc=<optimized out>, argv=<optimized out>) at text-utils/more.c:503
Sample steps to reproduce:
$ /usr/bin/more /etc/ld.so.cache
Press //.a to search for a pattern.
Press <Enter>
Press . to repeat least search.
It crashes.
It just needs a file that does not match. I used
/etc/ld.so.cache as an example, based on user example
on rhbz#1403971 :)
I confirm it is corrected in Fedora 25.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2017:2186
While trying to figure a reproducer to rhbz#1403971 I managed to get /usr/bin/more to crash on another condition. For example: (gdb) bt #0 __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:31 #1 0x00007ffff78c8d0f in __regcomp (preg=preg@entry=0x7fffffffde30, pattern=0x0, cflags=cflags@entry=8) at regcomp.c:499 #2 0x0000000000405813 in search (buf=<optimized out>, file=file@entry=0x60ee00, n=n@entry=1) at text-utils/more.c:1591 #3 0x0000000000405d6a in command (filename=filename@entry=0x0, f=f@entry=0x60ee00) at text-utils/more.c:1344 #4 0x0000000000406664 in screen (f=f@entry=0x60ee00, num_lines=<optimized out>, num_lines@entry=32) at text-utils/more.c:708 #5 0x0000000000402365 in main (argc=<optimized out>, argv=<optimized out>) at text-utils/more.c:503 Sample steps to reproduce: $ /usr/bin/more /etc/ld.so.cache Press //.a to search for a pattern. Press <Enter> Press . to repeat least search. It crashes.