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| author | Linus Torvalds | 2015-01-26 02:47:34 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2015-01-26 02:47:34 +0100 |
| commit | b73f0c8f4ba810cd753031d18f4fab83bd9ac58f (patch) | |
| tree | 672a387d9ae5844a8ffbcab3c7e7c8a3f285ab17 /kernel/time | |
| parent | Merge tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff) | |
| parent | Merge branch 'fortglx/3.19-stable/time' of https://git.linaro.org/people/john... (diff) | |
| download | kernel-qcow2-linux-b73f0c8f4ba810cd753031d18f4fab83bd9ac58f.tar.gz kernel-qcow2-linux-b73f0c8f4ba810cd753031d18f4fab83bd9ac58f.tar.xz kernel-qcow2-linux-b73f0c8f4ba810cd753031d18f4fab83bd9ac58f.zip | |
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"A set of small fixes:
- regression fix for exynos_mct clocksource
- trivial build fix for kona clocksource
- functional one liner fix for the sh_tmu clocksource
- two validation fixes to prevent (root only) data corruption in the
kernel via settimeofday and adjtimex. Tagged for stable"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: adjtimex: Validate the ADJ_FREQUENCY values
time: settimeofday: Validate the values of tv from user
clocksource: sh_tmu: Set cpu_possible_mask to fix SMP broadcast
clocksource: kona: fix __iomem annotation
clocksource: exynos_mct: Fix bitmask regression for exynos4_mct_write
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/ntp.c | 7 | ||||
| -rw-r--r-- | kernel/time/time.c | 4 |
2 files changed, 11 insertions, 0 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index 87a346fd6d61..28bf91c60a0b 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -633,6 +633,13 @@ int ntp_validate_timex(struct timex *txc) if ((txc->modes & ADJ_SETOFFSET) && (!capable(CAP_SYS_TIME))) return -EPERM; + if (txc->modes & ADJ_FREQUENCY) { + if (LONG_MIN / PPM_SCALE > txc->freq) + return -EINVAL; + if (LONG_MAX / PPM_SCALE < txc->freq) + return -EINVAL; + } + return 0; } diff --git a/kernel/time/time.c b/kernel/time/time.c index 6390517e77d4..2c85b7724af4 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -196,6 +196,10 @@ SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv, if (tv) { if (copy_from_user(&user_tv, tv, sizeof(*tv))) return -EFAULT; + + if (!timeval_valid(&user_tv)) + return -EINVAL; + new_ts.tv_sec = user_tv.tv_sec; new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; } |