Description of problem: I asked xsane to display one page from a multi-page project. That page was modified behind xsane's back using gimp. The page never show, and xsane get stuck. I killed it with SIGABRT to get a trace. Version-Release number of selected component: xsane-0.998-12.fc17 Additional info: libreport version: 2.0.14 abrt_version: 2.0.13 backtrace_rating: 4 cmdline: xsane crash_function: read kernel: 3.6.2-4.fc17.x86_64 truncated backtrace: :Thread no. 1 (10 frames) : #0 read at ../sysdeps/unix/syscall-template.S:82 : #1 _IO_new_file_underflow at fileops.c:619 : #2 _IO_default_uflow at genops.c:440 : #3 _IO_getline_info at iogetline.c:74 : #4 _IO_fgets at iofgets.c:58 : #5 fgets at /usr/include/bits/stdio2.h:255 : #6 xsane_read_pnm_header at ../../src/xsane-save.c:444 : #7 xsane_viewer_read_image_header at ../../src/xsane-viewer.c:2117 : #8 xsane_viewer_new at ../../src/xsane-viewer.c:2871 : #9 xsane_multipage_show_callback at ../../src/xsane-multipage-project.c:801
Created attachment 631934 [details] File: core_backtrace
Created attachment 631935 [details] File: environ
Created attachment 631936 [details] File: backtrace
Created attachment 631937 [details] File: cgroup
Created attachment 631938 [details] File: limits
Created attachment 631939 [details] File: maps
Created attachment 631940 [details] File: dso_list
Created attachment 631941 [details] File: build_ids
Created attachment 631942 [details] File: var_log_messages
Created attachment 631943 [details] File: open_fds
Same thing, trying to see a page from a multi-page project. This page was modified by GIMP backtrace_rating: 4 Package: xsane-0.998-12.fc17 OS Release: Fedora release 17 (Beefy Miracle)
XSane's own PNM parser is not very robust and can only read PNM produced by XSane.
(In reply to comment #12) > XSane's own PNM parser is not very robust and can only read PNM produced by > XSane. When a valid PNM file is fed to XSane decoder, the decoder enter in infinite loop mode, trying to find XSane additional (optional) headers.
Created attachment 632076 [details] Fix XSane PNM decoder Here's a patch that improve the XSane PNM decoder: - be sure to read return codes not to enter in infinite loop - be resilient to malformed or unrecognized PNM file - report errors in debug mode
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