primax: segfault
Subject:
segfault
From:
Peter Jay Salzman ####@####.####
Date:
30 Sep 2001 17:44:47 -0000
Message-Id: <20010930104418.A21670@dirac.org>
dear primax,
playing around with the driver resulted in a segfault:
# ./primax_scan -C 0 -S 600
Segmentation fault (core dumped)
here's the backtrace:
(gdb) bt
#0 0x401042b7 in malloc () from /lib/libc.so.6
#1 0x40103e44 in malloc () from /lib/libc.so.6
#2 0x4004e7fe in _TIFFmalloc () from /usr/lib/libtiff.so.3
#3 0x4004f31b in TIFFWriteRawTile () from /usr/lib/libtiff.so.3
#4 0x4004f42a in TIFFWriteCheck () from /usr/lib/libtiff.so.3
#5 0x4004ea6e in TIFFWriteScanline () from /usr/lib/libtiff.so.3
#6 0x80499ef in read_scan_data (image=0x804d8c0) at primax_scan.c:368
#7 0x804a0d5 in scan (image=0x804d8c0, mode=20) at primax_scan.c:625
#8 0x804a9ed in main (argc=5, argv=0xbffffa44) at primax_scan.c:942
here's the offending line:
(gdb) fr 6
#6 0x80499ef in read_scan_data (image=0x804d8c0) at primax_scan.c:368
368 TIFFWriteScanline(tiffile,tiffdata + read_ptr * total_width, y , 0);
variable info:
(gdb) ptype tiffile
type = struct tiff {
<incomplete type>
} *
(gdb) ptype tiffdata
type = unsigned char *
(gdb) ptype read_ptr
type = int
(gdb) ptype total_width
type = int
(gdb) ptype y
type = int
(gdb) print tiffile
$1 = (TIFF *) 0x807c4c0
(gdb) print tiffdata
$2 = (unsigned char *) 0x8072558 '\177' <repeats 200 times>...
(gdb) print read_ptr
$3 = 0
(gdb) print total_width
$4 = 1275
(gdb) print y
$5 = 0
if i can be of more help, let me know.
pete
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