diff options
Diffstat (limited to 'kernel/futex_compat.c')
| -rw-r--r-- | kernel/futex_compat.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c index 00b572666cc..133d558db45 100644 --- a/kernel/futex_compat.c +++ b/kernel/futex_compat.c @@ -30,6 +30,15 @@ fetch_robust_entry(compat_uptr_t *uentry, struct robust_list __user **entry, return 0; } +static void __user *futex_uaddr(struct robust_list *entry, + compat_long_t futex_offset) +{ + compat_uptr_t base = ptr_to_compat(entry); + void __user *uaddr = compat_ptr(base + futex_offset); + + return uaddr; +} + /* * Walk curr->robust_list (very carefully, it's a userspace list!) * and mark any locks found there dead, and notify any waiters. @@ -76,11 +85,12 @@ void compat_exit_robust_list(struct task_struct *curr) * A pending lock might already be on the list, so * dont process it twice: */ - if (entry != pending) - if (handle_futex_death((void __user *)entry + futex_offset, - curr, pi)) - return; + if (entry != pending) { + void __user *uaddr = futex_uaddr(entry, futex_offset); + if (handle_futex_death(uaddr, curr, pi)) + return; + } if (rc) return; uentry = next_uentry; @@ -94,9 +104,11 @@ void compat_exit_robust_list(struct task_struct *curr) cond_resched(); } - if (pending) - handle_futex_death((void __user *)pending + futex_offset, - curr, pip); + if (pending) { + void __user *uaddr = futex_uaddr(pending, futex_offset); + + handle_futex_death(uaddr, curr, pip); + } } asmlinkage long @@ -155,7 +167,8 @@ asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val, int val2 = 0; int cmd = op & FUTEX_CMD_MASK; - if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI)) { + if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI || + cmd == FUTEX_WAIT_BITSET)) { if (get_compat_timespec(&ts, utime)) return -EFAULT; if (!timespec_valid(&ts)) |