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Ticket Resolution Summary Owner Reporter
#3955 fixed regex checking crashes on long lines with UTF-8 locale mutt-dev thorsten
Description

The regex

color body brightblue default "[[:space:]][^[:space:]]+\\*"

lets mutt crash when viewing the attached mail. The mail was composed with mutt and has a plain-text attachment with a very long line (with spaces and stars).

For locales C and en_US, mutt does not crash, but with en_US.UTF-8 it crashes:

LC_ALL=en_US.UTF-8 ./mutt -F /dev/null \
 -e 'color body brightblue default "[[:space:]][^[:space:]]+\\*"' \
 -e 'push <display-message>' -f crash.mbox > /dev/null

I can reproduce the crash with the released 1.8.3 and with todays hg tip 952e4fcf1e2b (default branch) compiled with

./configure --enable-debug  --with-regex && make

The backtrace is the following:

$ LC_ALL=en_US.UTF-8 gdb -q ./mutt
Reading symbols from ./mutt...done.
(gdb) r -F /dev/null \
 -e 'color body brightblue default "[[:space:]][^[:space:]]+\\*"' \
 -e 'push <display-message>' -f crash.mbox > /dev/null
Starting program: /home/thorsten/git/mutt/mutt -F /dev/null  -e 'color body brightblue default "[[:space:]][^[:space:]]+\\*"'  -e 'push <display-message>' -f crash.mbox > /dev/null
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
                                                    0x0000000000481815 in re_match_2_internal (bufp=bufp@entry=0x7fffffffb010, string1=<optimized out>, string1@entry=0x0, size1=size1@entry=0, 
    string2=string2@entry=0x94cf70 "(equal_c SAT (some rr (and (some rr (and (some rr (and (all rr (or (all rr (or (not p3) (or (not p2) (or (all rr (or (some rr (and p6 (and (some rr (and *BOTTOM* (and (not p3) (and p2 (and p4 (and p4 "..., size2=size2@entry=1827888, pos=pos@entry=8, regs=0x7fffffffaff0, 
    stop=1827888) at regex.c:4652
4652	          PUSH_FAILURE_POINT (p + mcnt, d, -2);
(gdb) bt
#0  0x0000000000481815 in re_match_2_internal (bufp=bufp@entry=0x7fffffffb010, string1=<optimized out>, string1@entry=0x0, size1=size1@entry=0, 
    string2=string2@entry=0x94cf70 "(equal_c SAT (some rr (and (some rr (and (some rr (and (all rr (or (all rr (or (not p3) (or (not p2) (or (all rr (or (some rr (and p6 (and (some rr (and *BOTTOM* (and (not p3) (and p2 (and p4 (and p4 "..., size2=size2@entry=1827888, pos=pos@entry=8, regs=0x7fffffffaff0, 
    stop=1827888) at regex.c:4652
#1  0x0000000000486626 in re_search_2 (bufp=bufp@entry=0x7fffffffb010, string1=string1@entry=0x0, size1=size1@entry=0, 
    string2=string2@entry=0x94cf70 "(equal_c SAT (some rr (and (some rr (and (some rr (and (all rr (or (all rr (or (not p3) (or (not p2) (or (all rr (or (some rr (and p6 (and (some rr (and *BOTTOM* (and (not p3) (and p2 (and p4 (and p4 "..., size2=size2@entry=1827888, startpos=<optimized out>, 
    startpos@entry=0, range=1827880, regs=0x7fffffffaff0, stop=1827888) at regex.c:3586
#2  0x0000000000486b16 in re_search (regs=0x7fffffffaff0, range=<optimized out>, startpos=0, size=<optimized out>, 
    string=0x94cf70 "(equal_c SAT (some rr (and (some rr (and (some rr (and (all rr (or (all rr (or (not p3) (or (not p2) (or (all rr (or (some rr (and p6 (and (some rr (and *BOTTOM* (and (not p3) (and p2 (and p4 (and p4 "..., bufp=0x7fffffffb010) at regex.c:3457
#3  regexec (preg=preg@entry=0x785e30, 
    string=string@entry=0x94cf70 "(equal_c SAT (some rr (and (some rr (and (some rr (and (all rr (or (all rr (or (not p3) (or (not p2) (or (all rr (or (some rr (and p6 (and (some rr (and *BOTTOM* (and (not p3) (and p2 (and p4 (and p4 "..., nmatch=nmatch@entry=1, pmatch=pmatch@entry=0x7fffffffb130, 
    eflags=eflags@entry=0) at regex.c:5675
#4  0x0000000000446e56 in resolve_types (q_classify=2, force_redraw=0x7fffffffb8c0, q_level=0x7fffffffb8cc, QuoteList=0x7fffffffb8d0, 
    last=<optimized out>, n=37, lineInfo=<optimized out>, raw=<optimized out>, 
    buf=0x94cf70 "(equal_c SAT (some rr (and (some rr (and (some rr (and (all rr (or (all rr (or (not p3) (or (not p2) (or (all rr (or (some rr (and p6 (and (some rr (and *BOTTOM* (and (not p3) (and p2 (and p4 (and p4 "...) at pager.c:879
#5  display_line (f=0x78cbe0, last_pos=last_pos@entry=0x7fffffffb8d8, lineInfo=lineInfo@entry=0x7fffffffb978, n=37, last=last@entry=0x7fffffffb8b4, 
    max=max@entry=0x7fffffffb8b0, flags=66, QuoteList=0x7fffffffb8d0, q_level=0x7fffffffb8cc, force_redraw=0x7fffffffb8c0, SearchRE=0x7fffffffb910, 
    pager_window=0x78d860) at pager.c:1369
#6  0x000000000044778a in pager_menu_redraw (pager_menu=0x78d880) at pager.c:1807
#7  0x00000000004481e1 in mutt_pager (banner=banner@entry=0x0, fname=fname@entry=0x7fffffffbea0 "/tmp/mutt-faui8thorsten-1000-28734-7744702671431236879", 
    flags=flags@entry=66, extra=extra@entry=0x7fffffffbe70) at pager.c:1991
#8  0x0000000000412359 in mutt_display_message (cur=0x78a9f0) at commands.c:214
#9  0x000000000041d373 in mutt_index_menu () at curs_main.c:1337
#10 0x0000000000405323 in main (argc=<optimized out>, argv=0x7fffffffd728, environ=<optimized out>) at main.c:1252
(gdb) 

You can find the core.28734 file attached.

This bug sounds related to https://dev.mutt.org/trac/ticket/3850, however this is on archlinux and I have the configuration option --with-regex.

#3954 fixed conflict in generated variable mutt-dev antonio@…
Description

Hi, this small patch fixes a problem which appears when generating a variable with txt2c.sh

More details in http://bugs.debian.org/749483

#3953 fixed Spelling errors in manpages mutt-dev antonio@…
Description

Hi, would you mind integrating the two attached patches which will fix the spelling errors in manpages?

thanks!

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