On Mon, Aug 17, 2026 at 09:37:30PM +0100, Stuart Henderson wrote: > On 2026/08/17 18:56, Mikolaj Kucharski wrote: > > Hi all. > > > > I see consisent segmentation fault with `zbarimg -q --raw sample.png` > > command. I don't have usable core at present, so don't have any more > > info, but I am asking do you see the same? I took few random QR codes > > from the Internet and they all dump the core with above command. > > > > I was using over the years zbarimg many times, so I didn't see this > > before. I see this on two separate machines. > > I see it here too, also with other image formats, and with zbar compiled > with any of base llvm 22, ports llvm 21, ports gcc 16, on amd64 and > aarch64. Also same if I use packages from just before the ImageMagick > update. > > Found a slightly older laptop and updated to 2026-05-15-0105 > packages from ftp.hostserver.de archive, and zbar from there works. > > Stepping forward the zbar package from 2026-05-30-0105 works, > updating just zbar to the package from 2026-06-01-0105 without > touching any other package it starts segfaulting. > > The big thing that is likely to be in this window is LLVM 22. > > Here's a backtrace from one of the times it crashed. > > $ egdb zbarimg > GNU gdb (GDB) 17.2 > Copyright (C) 2025 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> > This is free software: you are free to change and redistribute it. > There is NO WARRANTY, to the extent permitted by law. > Type "show copying" and "show warranty" for details. > This GDB was configured as "x86_64-unknown-openbsd8.0". > Type "show configuration" for configuration details. > For bug reporting instructions, please see: > <https://www.gnu.org/software/gdb/bugs/>. > Find the GDB manual and other documentation resources online at: > <http://www.gnu.org/software/gdb/documentation/>. > > For help, type "help". > Type "apropos word" to search for commands related to "word"... > Reading symbols from zbarimg... > Reading symbols from /usr/local/bin/.debug/zbarimg.dbg... > (gdb) set args --verbose=999 somefile.png > (gdb) r > Starting program: /usr/local/bin/zbarimg --verbose=999 somefile.png > _zbar_process_image: processing: Y800(30303859) 324x234 @0x2e14426f000 > _zbar_scan_image: img_x+: 0000,0000 @0x2e14426f000 > _zbar_scan_image: img_x-: 0323,0001 @0x2e14426f287 > > Program received signal SIGSEGV, Segmentation fault. > _zbar_scan_image (iscn=0x2e17de0dd80, img=0x2e0d0cfa310) at img_scanner.c:964 > 964 uint8_t d = *p; > (gdb) bt > #0 _zbar_scan_image (iscn=0x2e17de0dd80, img=0x2e0d0cfa310) at > img_scanner.c:964 > #1 0x000002e136700ae9 in zbar_scan_image (iscn=0x2e0d0d06880, img=0x0) at > img_scanner.c:1128 > #2 0x000002e1366fa5f1 in _zbar_process_image (proc=0x2e0d0d2b480, > img=0x2e0d0cfa540) at processor.c:84 > #3 0x000002e1366fc50c in zbar_process_image (proc=0x2e0d0d2b480, > img=0x2e0d0cfa540) at processor.c:707 > #4 0x000002de9426d5a6 in scan_image (filename=0x7743e50f5b7d "somefile.png") > at zbarimg/zbarimg.c:209 > #5 0x000002de9426ccf8 in main (argc=3, argv=0x7743e50f5908) at > zbarimg/zbarimg.c:448 > (gdb) frame 2 > #2 0x000002e1366fa5f1 in _zbar_process_image (proc=0x2e0d0d2b480, > img=0x2e0d0cfa540) at processor.c:84 > 84 nsyms = zbar_scan_image(proc->scanner, tmp); > (gdb) list > 79 if (proc->syms) { > 80 zbar_symbol_set_ref(proc->syms, -1); > 81 proc->syms = NULL; > 82 } > 83 zbar_image_scanner_recycle_image(proc->scanner, img); > 84 nsyms = zbar_scan_image(proc->scanner, tmp); > 85 _zbar_image_swap_symbols(img, tmp); > 86 > 87 zbar_image_destroy(tmp); > 88 tmp = NULL; > (gdb) p tmp > $1 = (zbar_image_t *) 0x2e0d0cfa310 > (gdb) p *tmp > $2 = { > format = 808466521, > width = 324, > height = 234, > data = 0x2e14426f000, > datalen = 75816, > crop_x = 0, > crop_y = 0, > crop_w = 324, > crop_h = 234, > userdata = 0x0, > cleanup = 0x2e1366f8780 <cleanup_ref>, > refcnt = 1, > src = 0x0, > srcidx = -1, > next = 0x2e0d0cfa540, > seq = 0, > syms = 0x2e0d0d2ffc0 > } > (gdb) frame 3 > #3 0x000002e1366fc50c in zbar_process_image (proc=0x2e0d0d2b480, > img=0x2e0d0cfa540) at processor.c:707 > 707 rc = _zbar_process_image(proc, img); > (gdb) p img > $3 = (zbar_image_t *) 0x2e0d0cfa540 > (gdb) list > 702 rc = _zbar_processor_set_size(proc, zbar_image_get_width(img), > 703 zbar_image_get_height(img)); > 704 if (!rc) { > 705 zbar_image_scanner_enable_cache(proc->scanner, 0); > 706 zbar_image_scanner_request_dbus(proc->scanner, > proc->is_dbus_enabled); > 707 rc = _zbar_process_image(proc, img); > 708 if (proc->streaming) > 709 zbar_image_scanner_enable_cache(proc->scanner, 1); > 710 } > 711 > > On another machine which is closer to -current, recompiling zbar with > -O1 I still get SEGV, but with -O0 it works ok. > > Belatedly thought to check issues/PRs and found > https://github.com/mchehab/zbar/pull/329 which would explain it, > and tests concur. > > ok?
there are other (slightly different) PRs as well https://github.com/mchehab/zbar/pull/299 https://github.com/mchehab/zbar/pull/332 ok jsg@ > > Index: Makefile > =================================================================== > RCS file: /cvs/ports/graphics/zbar/Makefile,v > diff -u -p -r1.40 Makefile > --- Makefile 17 Aug 2026 19:36:49 -0000 1.40 > +++ Makefile 17 Aug 2026 20:36:57 -0000 > @@ -1,7 +1,7 @@ > COMMENT= ZBar barcode reader > > DISTNAME= zbar-0.23.93 > -REVISION= 2 > +REVISION= 3 > > SHARED_LIBS= zbar 0.1 \ > zbargtk 0.1 > Index: patches/patch-zbar_img_scanner_c > =================================================================== > RCS file: patches/patch-zbar_img_scanner_c > diff -N patches/patch-zbar_img_scanner_c > --- /dev/null 1 Jan 1970 00:00:00 -0000 > +++ patches/patch-zbar_img_scanner_c 17 Aug 2026 20:36:57 -0000 > @@ -0,0 +1,22 @@ > +https://github.com/mchehab/zbar/pull/329, plus pull in stddef.h > + > +Index: zbar/img_scanner.c > +--- zbar/img_scanner.c.orig > ++++ zbar/img_scanner.c > +@@ -33,6 +33,7 @@ > + #endif > + > + #include <assert.h> > ++#include <stddef.h> /* ptrdiff_t */ > + #include <stdlib.h> /* malloc, free */ > + #include <string.h> /* memcmp, memset, memcpy */ > + > +@@ -862,7 +863,7 @@ static void zbar_send_code_via_dbus(zbar_image_scanner > + do { \ > + x += (dx); \ > + y += (dy); \ > +- p += (dx) + ((uintptr_t)(dy)*w); \ > ++ p += (ptrdiff_t)(dx) + (intptr_t)(dy) * (intptr_t)w; \ > + } while (0); > + > + static void *_zbar_scan_image(zbar_image_scanner_t *iscn, zbar_image_t *img) > >
