| Summary: | strptime truncate 64bit pointer to 32bit | ||
|---|---|---|---|
| Product: | glibc | Reporter: | hxnhxn |
| Component: | libc | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED INVALID | ||
| Severity: | normal | CC: | bugdal, drepper.fsp, neleai |
| Priority: | P2 | Flags: | fweimer:
security-
|
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Last reconfirmed: | ||
Cannot replicate on x86-64. Test program returns: 7fffffffe633 7fffffffe620 q which has upper bytes nonzero. Next time try compiling with -Werror=implicit-function-declaration. You may also want to file a bug report with GCC requesting that this be made default, since use of implicit function declarations is always an error and is a constraint violation. |
under 64-bit enviroment, when input an 64-bit pointer as arg1 to strptime, e.g, a char[] array, it will return a pointer with higher 4 bytes set to zero. for example: char timestr[655] = "2011-11-27T23:06:23qi/ning"; struct tm t; char * ret = strptime(timestr, "%FT%H:%M:%S", &t); printf("%llx %llx\n", ret, timestr); printf("%c\n", *ret);