Gents,
I have stumbled upon a very interesting issue...
my gallery runs well... very few server errors... but sometimes they do occur.... but today, one of the users uploaded an image... it shows under new photos, the thumb gets created, but when anyone attempts to view it, the error 500 occurs...
here is what the tech support from the provider gave me...
Hello,
I'm sorry, but the system appears to be segfaulting when trying to load that one image. I'm not certain why. It's possible there is a memory issue, if the image is unusually large in dimension (although it is not unusually large in file size). Here is the segfault in process execution trace:
time(NULL) = 1261997397
open("/home/.../data/media/4/2962016_large.jpeg", O_RDONLY) = 6
fstat64(6, {st_mode=S_IFREG|0666, st_size=109869, ...}) = 0
lseek(6, 0, SEEK_CUR) = 0
time(NULL) = 1261997397
stat64("/home/.../data/media/4/2962016_large.jpeg", {st_mode=S_IFREG|0666, st_size=109869, ...}) = 0
lseek(6, 0, SEEK_SET) = 0
read(6, "\377\330\377\340\0\20JFIF\0\1\2\1\0`\0`\0\0\377\341+\235Exif\0\0II"..., 8192) = 8192
read(6, "sj\223\v\270-\21\227l~fIb;q\322\200=#\341E\375\315\226\250\326\27O\30\16\236b"..., 8192) = 8192
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
Process 20152 detached
And the backtrace from the core dump:
#0 0x46cf47dc in memcpy () from /lib/libc.so.6
#1 0x08311953 in _estrndup (s=0xb4bb18e4 <Address 0xb4bb18e4 out of bounds>, length=3032160484) at /home/cpeasyapache/src/php-5.2.9/Zend/zend_alloc.c:2439
#2 0x0810d50a in exif_iif_add_tag (image_info=0xbfd804a4, section_index=147914252, name=0xbfd80014 "UndefinedTag:0x000D", tag=13, format=7, length=3072,
value=0xb4bb18e4, tsrm_ls=0x8865730) at /home/cpeasyapache/src/php-5.2.9/ext/exif/exif.c:1723
#3 0x0810e427 in exif_process_IFD_TAG (ImageInfo=0xbfd804a4, dir_entry=0x8d0d518 "\r", offset_base=0xb4bb1568 <Address 0xb4bb1568 out of bounds>,
IFDlength=11157, displacement=30, section_index=13, ReadNextIFD=0, tag_table=0x847d440, tsrm_ls=0x8865730)
at /home/cpeasyapache/src/php-5.2.9/ext/exif/exif.c:3120
#4 0x0810f30e in exif_process_IFD_TAG (ImageInfo=0xbfd804a4, dir_entry=<value optimized out>, offset_base=0xb4bb1568 <Address 0xb4bb1568 out of bounds>,
IFDlength=11157, displacement=30, section_index=7, ReadNextIFD=1, tag_table=0x847ca20, tsrm_ls=0x8865730)
at /home/cpeasyapache/src/php-5.2.9/ext/exif/exif.c:2807
#5 0x0810e007 in exif_process_IFD_in_JPEG (ImageInfo=0xbfd804a4, dir_start=<value optimized out>, offset_base=0x8d0d26c "II*", IFDlength=11157,
displacement=30, section_index=7, tsrm_ls=0x8865730) at /home/cpeasyapache/src/php-5.2.9/ext/exif/exif.c:3148
#6 0x0810f120 in exif_process_IFD_TAG (ImageInfo=0xbfd804a4, dir_entry=<value optimized out>, offset_base=0x8d0d26c "II*", IFDlength=11157,
displacement=30, section_index=3, ReadNextIFD=1, tag_table=0x847ca20, tsrm_ls=0x8865730) at /home/cpeasyapache/src/php-5.2.9/ext/exif/exif.c:3111
#7 0x0810e007 in exif_process_IFD_in_JPEG (ImageInfo=0xbfd804a4, dir_start=<value optimized out>, offset_base=0x8d0d26c "II*", IFDlength=11157,
displacement=30, section_index=3, tsrm_ls=0x8865730) at /home/cpeasyapache/src/php-5.2.9/ext/exif/exif.c:3148
#8 0x08110d04 in exif_read_file (ImageInfo=0xbfd804a4, FileName=<value optimized out>, read_thumbnail=0, read_all=0, tsrm_ls=0x8865730)
at /home/cpeasyapache/src/php-5.2.9/ext/exif/exif.c:3225
#9 0x08111fa6 in zif_exif_read_data (ht=2, return_value=0x8b20714, return_value_ptr=0x0, this_ptr=0x0, return_value_used=1, tsrm_ls=0x8865730)
at /home/cpeasyapache/src/php-5.2.9/ext/exif/exif.c:3972
Unfortunately, at this time there is nothing we can do to assist in getting this picture viewable. I have attempted to increase memory - although we were already at the maximum allotment for our shared servers - temporarily, and that did not make a difference. If this file is unusually large in dimension, you may wish to scale it down before uploading it to the site.
Cheers,
Linux Systems Administration
this happens with ONLY ONE picture so far... other pics show well with no problems.... strange....
