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| author | Kevin Hilman <khilman@linaro.org> | 2013-12-20 08:30:50 -0800 |
|---|---|---|
| committer | Kevin Hilman <khilman@linaro.org> | 2013-12-20 08:30:50 -0800 |
| commit | cd15c51d6c2f577f896471a058f33a95f164dba2 (patch) | |
| tree | 9d42b8ea581ca35bdf75467b8bbbab21e7056ff9 /kernel/futex.c | |
| parent | 5b8314a98888b12159d0b1b14982b8dd2d94e3f5 (diff) | |
| parent | 130f769e81fc472beb2211320777e26050e3fa15 (diff) | |
Merge tag 'omap-for-v3.13/display-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
I accidentally removed some mux code for omap4 that I thought was
dead code as omap4 has been booting with device tree only since
v3.10. Turns out I also removed some display related mux code,
so let's revert that except for the dead code parts.
* tag 'omap-for-v3.13/display-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (439 commits)
Revert "ARM: OMAP2+: Remove legacy mux code for display.c"
+Linux 3.13-rc4
Diffstat (limited to 'kernel/futex.c')
| -rw-r--r-- | kernel/futex.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/futex.c b/kernel/futex.c index 80ba086f021d..f6ff0191ecf7 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -251,6 +251,9 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw) return -EINVAL; address -= key->both.offset; + if (unlikely(!access_ok(rw, uaddr, sizeof(u32)))) + return -EFAULT; + /* * PROCESS_PRIVATE futexes are fast. * As the mm cannot disappear under us and the 'key' only needs @@ -259,8 +262,6 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw) * but access_ok() should be faster than find_vma() */ if (!fshared) { - if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))) - return -EFAULT; key->private.mm = mm; key->private.address = address; get_futex_key_refs(key); @@ -288,7 +289,7 @@ again: put_page(page); /* serialize against __split_huge_page_splitting() */ local_irq_disable(); - if (likely(__get_user_pages_fast(address, 1, 1, &page) == 1)) { + if (likely(__get_user_pages_fast(address, 1, !ro, &page) == 1)) { page_head = compound_head(page); /* * page_head is valid pointer but we must pin |