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| author | Alan Modra <amodra@gmail.com> | 2020-12-24 16:11:03 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2020-12-24 22:58:14 +1030 |
| commit | dccc31dee37b559219708c8d0accc7d512d51c1f (patch) | |
| tree | d8a715ea7756951b41d671733c521e668622e51f | |
| parent | de34d42812a0b978b278cd344abeaee7c71fa55c (diff) | |
| download | gdb-dccc31dee37b559219708c8d0accc7d512d51c1f.zip gdb-dccc31dee37b559219708c8d0accc7d512d51c1f.tar.gz gdb-dccc31dee37b559219708c8d0accc7d512d51c1f.tar.bz2 | |
asan: print_vms_time signed integer overflow
I really don't think anyone cares about underflow of vms time values,
but the potential segfault on a gmtime failure is worth fixing.
* readelf.c (INT64_MIN): Define if not already defined.
(print_vms_time): Catch 64-bit overflow when converting from
vms time to posix time. Don't segfault if gmtime returns NULL.
| -rw-r--r-- | binutils/ChangeLog | 6 | ||||
| -rw-r--r-- | binutils/readelf.c | 21 |
2 files changed, 21 insertions, 6 deletions
diff --git a/binutils/ChangeLog b/binutils/ChangeLog index 298c28c..3626fd8 100644 --- a/binutils/ChangeLog +++ b/binutils/ChangeLog @@ -1,3 +1,9 @@ +2020-12-24 Alan Modra <amodra@gmail.com> + + * readelf.c (INT64_MIN): Define if not already defined. + (print_vms_time): Catch 64-bit overflow when converting from + vms time to posix time. Don't segfault if gmtime returns NULL. + 2020-12-23 H.J. Lu <hongjiu.lu@intel.com> * NEWS: Mention LAM_U48 and LAM_U57 support. diff --git a/binutils/readelf.c b/binutils/readelf.c index 46fd87a..3e3ac2f7 100644 --- a/binutils/readelf.c +++ b/binutils/readelf.c @@ -9886,20 +9886,29 @@ dynamic_section_parisc_val (Elf_Internal_Dyn * entry) #define VMS_EPOCH_OFFSET 35067168000000000LL #define VMS_GRANULARITY_FACTOR 10000000 +#ifndef INT64_MIN +#define INT64_MIN (-9223372036854775807LL - 1) +#endif /* Display a VMS time in a human readable format. */ static void print_vms_time (bfd_int64_t vmstime) { - struct tm *tm; + struct tm *tm = NULL; time_t unxtime; - unxtime = (vmstime - VMS_EPOCH_OFFSET) / VMS_GRANULARITY_FACTOR; - tm = gmtime (&unxtime); - printf ("%04u-%02u-%02uT%02u:%02u:%02u", - tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, - tm->tm_hour, tm->tm_min, tm->tm_sec); + if (vmstime >= INT64_MIN + VMS_EPOCH_OFFSET) + { + vmstime = (vmstime - VMS_EPOCH_OFFSET) / VMS_GRANULARITY_FACTOR; + unxtime = vmstime; + if (unxtime == vmstime) + tm = gmtime (&unxtime); + } + if (tm != NULL) + printf ("%04u-%02u-%02uT%02u:%02u:%02u", + tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); } #endif /* BFD64 */ |