Bug#636286: eglibc: SIGSEGV in strcoll in UTF-8 locales with certain characters
Hi!
On 8/21/20 9:33 PM, John Paul Adrian Glaubitz wrote:
> Could you check whether this bugs still persists? It's probably been fixed
> long time ago, hasn't it?
Looks like the bug is no longer reproducible:
root@pacman:~# cat sfl.c
#include
#include
#include
#include
const char s1[] = { 0x20, 0xe0, 0xa6, 0xac, 0x00 };
const char s2[] = { 0x20, 0xe0, 0xa6, 0xad, 0x00 };
int
main(void)
{
int r;
if (setlocale(LC_ALL, "") == NULL)
err(4, "setlocale");
r = strcoll(s1, s2);
return (r < 0 ? 1 : r == 0 ? 2 : 3);
}
root@pacman:~# gcc -o sfl sfl.c
root@pacman:~# LC_ALL=C.UTF-8 ./sfl; echo $?
1
root@pacman:~#
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaub...@debian.org
`. `' Freie Universitaet Berlin - glaub...@physik.fu-berlin.de
`-GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
Bug#636286: eglibc: SIGSEGV in strcoll in UTF-8 locales with certain characters
User: debian-68klists.debian.org Usertags: m68k X-Debbugs-CC: debian-...@lists.debian.org Hi Thorsten! Could you check whether this bugs still persists? It's probably been fixed long time ago, hasn't it? Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaub...@debian.org `. `' Freie Universitaet Berlin - glaub...@physik.fu-berlin.de `-GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
Bug#636286: eglibc: SIGSEGV in strcoll in UTF-8 locales with certain characters
The locale files are invalid. Since I cannot reproduce that with the unmodified localedef program this must be due to some broken debian patches. Andreas. -- Andreas Schwab, sch...@linux-m68k.org GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 And now for something completely different. -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/m2pqkhoxsj@igel.home
Bug#636286: eglibc: SIGSEGV in strcoll in UTF-8 locales with certain characters
There is no testcase. Andreas. -- Andreas Schwab, sch...@linux-m68k.org GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 And now for something completely different. -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/m2pqknhgrt@igel.home
Bug#636286: eglibc: SIGSEGV in strcoll in UTF-8 locales with certain characters
Andreas Schwab dixit:
There is no testcase.
Meh, you know that when you say attach but forget to actually do it?
Thanks for spotting. Here it is.
bye,
//mirabilos
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‣ src:mksh (2 bugs: 0 RC, 0 IN, 2 MW, 0 FP)#include err.h
#include locale.h
#include stdlib.h
#include string.h
const char s1[] = { 0x20, 0xe0, 0xa6, 0xac, 0x00 };
const char s2[] = { 0x20, 0xe0, 0xa6, 0xad, 0x00 };
int
main(void)
{
int r;
if (setlocale(LC_ALL, ) == NULL)
err(4, setlocale);
r = strcoll(s1, s2);
return (r 0 ? 1 : r == 0 ? 2 : 3);
}
Bug#636286: eglibc: SIGSEGV in strcoll in UTF-8 locales with certain characters
Source: eglibc Version: 2.13-11 Severity: normal (Only normal severity because this doesn't happen on i386) root@aranym:~ # LC_ALL=C ./sfl; echo $? 1 root@aranym:~ # LC_ALL=CUT ./sfl; echo $? sfl: setlocale: No such file or directory 4 root@aranym:~ # LC_ALL=C.UTF-8 ./sfl; echo $? Segmentation fault 139 Works with no or a nonexistent locale, but not with a UTF-8 locale. The problem was found in the code of localechooser (a d-i component which runs sort over native language lists at build). Program received signal SIGSEGV, Segmentation fault. 0xc0094940 in findidx (s1=0x8556 ব, s2=0x855b ভ, l=0xc0145990) at ../locale/weight.h:126 126 return indirect[-i + offset]; (gdb) bt #0 0xc0094940 in findidx (s1=0x8556 ব, s2=0x855b ভ, l=0xc0145990) at ../locale/weight.h:126 #1 __strcoll_l (s1=0x8556 ব, s2=0x855b ভ, l=0xc0145990) at strcoll_l.c:213 #2 0xc008f960 in strcoll (s1=0x8556 ব, s2=0x855b ভ) at strcoll.c:37 #3 0x848e in main () at sfl.c:16 (gdb) print indirect $1 = value optimized out (gdb) print i $2 = value optimized out (gdb) print offset $3 = value optimized out I’ve got libc6-dbg installed, but it doesn’t seem to pick that up, even with LD_LIBRARY_PATH=/usr/lib/debug/lib/m68k-linux-gnu set. It does however load the symbols: Reading symbols from /lib/m68k-linux-gnu/libc.so.6...Reading symbols from /usr/lib/debug/lib/m68k-linux-gnu/libc-2.13.so...done. I had to manually unpack and quilt push -a the source to get this far, though. How am I supposed to use the libc6-dbg package then? The error does NOT occur if the test programme is linked statically. By preventing inlining and handcompiling strcoll_l.c with a slightly adjusted (duplocale and __strcoll_l using) programme I got this: 0x8796 in findidx (cpp=0xefbc0728) at ../locale/weight.h:126 126 return indirect[-i + offset]; (gdb) print cpp $1 = (const unsigned char **) 0xefbc0728 (gdb) print *cpp $2 = (const unsigned char *) 0x8000107c \246\254 (gdb) x/4xb *cpp 0x8000107c s1+2: 0xa60xac0x000x20 (gdb) print indirect Cannot access memory at address 0xcda56b30 (gdb) print i $3 = -1130053888 (gdb) print offset $4 = value optimized out Sorry, can’t debug this further. https://wiki.debian.org/Aranym/Quick has an easy way to get a VM image for testing. -- System Information: Debian Release: wheezy/sid Architecture: m68k Kernel: Linux 3.0.0-1-atari Locale: LANG=C, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/mksh-static -- To UNSUBSCRIBE, email to debian-glibc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110801235636.31812.58475.report...@aranym.mirbsd.org
