Commit Graph

2 Commits

Author SHA1 Message Date
Florian Weimer
5f40e4b1ba Linux: Fix UTC offset setting in settimeofday for __TIMESIZE != 64
The time argument is NULL in this case, and attempt to convert it
leads to a null pointer dereference.

This fixes commit d2e3b697da
("y2038: linux: Provide __settimeofday64 implementation").

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2020-06-30 21:20:20 +02:00
Lukasz Majewski
d2e3b697da y2038: linux: Provide __settimeofday64 implementation
This patch provides new __settimeofday64 explicit 64 bit function for setting
64 bit time in the kernel (by internally calling __clock_settime64).
Moreover, a 32 bit version - __settimeofday has been refactored to internally
use __settimeofday64.

The __settimeofday is now supposed to be used on systems still supporting 32
bit time (__TIMESIZE != 64) - hence the necessary conversion of struct
timeval to 64 bit struct __timespec64.

Internally the settimeofday uses __settimeofday64. This patch is necessary
for having architectures with __WORDSIZE == 32 Y2038 safe.

Build tests:
./src/scripts/build-many-glibcs.py glibcs

Run-time tests:
- Run specific tests on ARM/x86 32bit systems (qemu):
  https://github.com/lmajewski/meta-y2038 and run tests:
  https://github.com/lmajewski/y2038-tests/commits/master

Above tests were performed with Y2038 redirection applied as well as without
to test proper usage of both __settimeofday64 and __settimeofday.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2020-02-07 17:55:08 +01:00