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Commit c89fdf52 authored by Chen Jun's avatar Chen Jun Committed by Yang Yingliang
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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: default avatarChen Jun <chenjun102@huawei.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarRichard Cochran <richardcochran@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210414030449.90692-1-chenjun102@huawei.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
parent 3ebb34e5
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