Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1210038592 (LWP 2240)]
0xb7e6e5b4 in memset () from /lib/tls/libc.so.6
(gdb) backtrace
#0 0xb7e6e5b4 in memset () from /lib/tls/libc.so.6
#1 0xb7f4c28e in ct_status_alloc_slot (num=0xbffaed24) at status.c:144
#2 0x0804a5ac in main (argc=5, argv=Cannot access memory at address 0x5
) at ifdhandler.c:119
openct/src/ct/status.c:
ct_map_status:
55: addr = mmap(NULL, *size, prot, MAP_SHARED, fd, 0);
!!! *size == 0
ct_status_alloc_slot:
108: info = (ct_info_t *) ct_map_status(O_RDWR, &size);
109: if (info == NULL)
110: return NULL;
!!! Linux-2.6.x: info == -1 // (info == MAP_FAILED)
!!! Linux-2.4.x: info == NULL
143: memset(&info[*num], 0, sizeof(ct_info_t));
!!! SIGSEGV
http://www.opengroup.org/onlinepubs/000095399/functions/mmap.html :
RETURN VALUE
Upon successful completion, the mmap() function shall return the
address at which the mapping was placed ( pa); otherwise, it shall
return a value of MAP_FAILED and set errno to indicate the error.
linux/mm/mmap.c: do_mmap_pgoff:
Linux-2.4.36:
414: if (!len)
415: return addr;
http://git.kernel.org/?p=linux/kernel/git/wtarreau/linux-2.4.git;a=blob;f=mm/mmap.c;h=536510a249374f4b1cc0753a0dfb4cb44c741eff;hb=89daf14f822d33ecb1ea5681fd968bd6a46cfc8c#l415
Linux-2.6.25:
917: if (!len)
918: return -EINVAL;
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=mm/mmap.c;h=a32d28ce31cda697aff68fdc6c939560096e3a50;hb=4b119e21d0c66c22e8ca03df05d9de623d0eb50f#l918
diff -u -r openct-0.6.14/src/ct/status.c new/openct-0.6.14/src/ct/status.c
--- openct-0.6.14/src/ct/status.c 2007-05-26 01:11:46.000000000 +0400
+++ new/openct-0.6.14/src/ct/status.c 2007-11-08 14:54:54.000000000 +0300
@@ -53,6 +53,8 @@
prot |= PROT_WRITE;
addr = mmap(NULL, *size, prot, MAP_SHARED, fd, 0);
+ if (addr == MAP_FAILED)
+ addr = NULL;
done:close(fd);
return addr;
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