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| author | Hungyu Lin <dennylin0707@gmail.com> | 2026-10-20 16:11:21 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@kernel.org> | 2026-10-25 22:43:19 +0100 |
| commit | 5b819071e4346256c4edbae5cc2095dff25694fc (patch) | |
| tree | 97a6461d655523808f51f979e09dd0dbae2cf1c0 /kernel | |
| parent | bd091346971c88fccd44afd2547d28366f824572 (diff) | |
| download | linux-5b819071e4346256c4edbae5cc2095dff25694fc.tar.gz linux-5b819071e4346256c4edbae5cc2095dff25694fc.zip | |
posix-timers: Accept NULL clock_getres() output in stubs
With CONFIG_POSIX_TIMERS disabled, clock_getres() returns -EFAULT for a
supported clock when the result pointer is NULL. POSIX permits a NULL
result pointer to suppress returning the clock resolution.
Only copy the result when a destination is provided, in both the native
and time32 stubs. This matches the full POSIX timer implementation and
preserves clock ID validation.
Fixes: baa73d9e478f ("posix-timers: Make them configurable")
Fixes: d822cdcce43f ("posix-timers: Move compat versions of clock_gettime/settime/getres")
Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20261020161121.85042-1-dennylin0707@gmail.com
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/posix-stubs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c index 9b6fcb8d85e7..5a27335a917e 100644 --- a/kernel/time/posix-stubs.c +++ b/kernel/time/posix-stubs.c @@ -83,7 +83,7 @@ SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock, struct __kernel_time case CLOCK_REALTIME: case CLOCK_MONOTONIC: case CLOCK_BOOTTIME: - if (put_timespec64(&rtn_tp, tp)) + if (tp && put_timespec64(&rtn_tp, tp)) return -EFAULT; return 0; default: @@ -166,7 +166,7 @@ SYSCALL_DEFINE2(clock_getres_time32, clockid_t, which_clock, case CLOCK_REALTIME: case CLOCK_MONOTONIC: case CLOCK_BOOTTIME: - if (put_old_timespec32(&rtn_tp, tp)) + if (tp && put_old_timespec32(&rtn_tp, tp)) return -EFAULT; return 0; default: |