posix-timers: Preserve return value in clock_adjtime32()
stable inclusion from linux-4.19.191 commit 1a852780d9d93378ae4f7d7d57213bc114c6873f -------------------------------- commit 2d036dfa5f10df9782f5278fc591d79d283c1fad upstream. The return value on success (>= 0) is overwritten by the return value of put_old_timex32(). That works correct in the fault case, but is wrong for the success case where put_old_timex32() returns 0. Just check the return value of put_old_timex32() and return -EFAULT in case it is not zero. [ tglx: Massage changelog ] Fixes: 3a4d44b6 ("ntp: Move adjtimex related compat syscalls to native counterparts") Signed-off-by:Chen Jun <chenjun102@huawei.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Reviewed-by:
Richard Cochran <richardcochran@gmail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210414030449.90692-1-chenjun102@huawei.com Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
Yang Yingliang <yangyingliang@huawei.com>
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